definitely commit

MotorPlant/MotorPlant.sln

@@ -3,15 +3,19 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.7.34031.279
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MotorPlantView", "MotorPlantView\MotorPlantView.csproj", "{254164C1-CDF8-4F3C-8564-8C8987B7BFA1}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MotorPlantView", "MotorPlantView\MotorPlantView.csproj", "{254164C1-CDF8-4F3C-8564-8C8987B7BFA1}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MotorPlantDataModels", "MotorPlantDataModels\MotorPlantDataModels.csproj", "{F9D3BBA7-D038-4F69-911E-0A25407E4716}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MotorPlantDataModels", "MotorPlantDataModels\MotorPlantDataModels.csproj", "{F9D3BBA7-D038-4F69-911E-0A25407E4716}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MotorPlantContracts", "MotorPlantContracts\MotorPlantContracts.csproj", "{B2784391-936D-471E-BB99-215CB345B1CD}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MotorPlantContracts", "MotorPlantContracts\MotorPlantContracts.csproj", "{B2784391-936D-471E-BB99-215CB345B1CD}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MotorPlantListImplement", "MotorPlantListImplement\MotorPlantListImplement.csproj", "{0694ECF1-AEF8-4033-A0BF-EAA22A733F31}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MotorPlantListImplement", "MotorPlantListImplement\MotorPlantListImplement.csproj", "{0694ECF1-AEF8-4033-A0BF-EAA22A733F31}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MotorPlantBusinessLogic", "MotorPlantBusinessLogic\MotorPlantBusinessLogic.csproj", "{75003AA5-9D46-45B6-9EF0-BAF16E2790EA}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MotorPlantBusinessLogic", "MotorPlantBusinessLogic\MotorPlantBusinessLogic.csproj", "{75003AA5-9D46-45B6-9EF0-BAF16E2790EA}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MotorPlantFileImplement", "MotorPlantFileImplement\MotorPlantFileImplement.csproj", "{183138D6-8EC0-46FD-9B1B-03DBCFEDD7F4}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MotorPlantDatabaseImplement", "MotorPlantDatabaseImplement\MotorPlantDatabaseImplement.csproj", "{30979D82-B5E7-470E-8083-1207FE9ADA5C}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -39,6 +43,14 @@ Global
 		{75003AA5-9D46-45B6-9EF0-BAF16E2790EA}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{75003AA5-9D46-45B6-9EF0-BAF16E2790EA}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{75003AA5-9D46-45B6-9EF0-BAF16E2790EA}.Release|Any CPU.Build.0 = Release|Any CPU
+		{183138D6-8EC0-46FD-9B1B-03DBCFEDD7F4}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{183138D6-8EC0-46FD-9B1B-03DBCFEDD7F4}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{183138D6-8EC0-46FD-9B1B-03DBCFEDD7F4}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{183138D6-8EC0-46FD-9B1B-03DBCFEDD7F4}.Release|Any CPU.Build.0 = Release|Any CPU
+		{30979D82-B5E7-470E-8083-1207FE9ADA5C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{30979D82-B5E7-470E-8083-1207FE9ADA5C}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{30979D82-B5E7-470E-8083-1207FE9ADA5C}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{30979D82-B5E7-470E-8083-1207FE9ADA5C}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

MotorPlant/MotorPlantBusinessLogic/MotorPlantBusinessLogic.csproj

@@ -8,6 +8,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="8.0.0" />
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="7.0.11" />
   </ItemGroup>
 
   <ItemGroup>

MotorPlant/MotorPlantContracts/MotorPlantContracts.csproj

@@ -6,6 +6,10 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="7.0.11" />
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\MotorPlantDataModels\MotorPlantDataModels.csproj" />
   </ItemGroup>

MotorPlant/MotorPlantDataModels/MotorPlantDataModels.csproj

@@ -6,4 +6,8 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="7.0.11" />
+  </ItemGroup>
+
 </Project>

MotorPlant/MotorPlantDatabaseImplement/Implements/ComponentStorage.cs

@@ -0,0 +1,71 @@
+using MotorPlantContracts.BindingModels;
+using MotorPlantContracts.SearchModels;
+using MotorPlantContracts.StoragesContracts;
+using MotorPlantContracts.ViewModels;
+using MotorPlantDatabaseImplement.Models;
+
+namespace MotorPlantDatabaseImplement.Implements
+{
+    public class ComponentStorage : IComponentStorage
+    {
+        public List<ComponentViewModel> GetFullList()
+        {
+            using var context = new MotorPlantDatabase();
+            return context.Components.Select(x => x.GetViewModel).ToList();
+        }
+        public List<ComponentViewModel> GetFilteredList(ComponentSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.ComponentName))
+            {
+                return new();
+            }
+            using var context = new MotorPlantDatabase();
+            return context.Components.Where(x => x.ComponentName.Contains(model.ComponentName)).Select(x => x.GetViewModel).ToList();
+        }
+        public ComponentViewModel? GetElement(ComponentSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.ComponentName) && !model.Id.HasValue)
+            {
+                return null;
+            }
+            using var context = new MotorPlantDatabase();
+            return context.Components.FirstOrDefault(x => (!string.IsNullOrEmpty(model.ComponentName) && x.ComponentName == model.ComponentName) || (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
+        }
+        public ComponentViewModel? Insert(ComponentBindingModel model)
+        {
+            var newComponent = Component.Create(model);
+            if (newComponent == null)
+            {
+                return null;
+            }
+            using var context = new MotorPlantDatabase();
+            context.Components.Add(newComponent);
+            context.SaveChanges();
+            return newComponent.GetViewModel;
+        }
+        public ComponentViewModel? Update(ComponentBindingModel model)
+        {
+            using var context = new MotorPlantDatabase();
+            var component = context.Components.FirstOrDefault(x => x.Id == model.Id);
+            if (component == null)
+            {
+                return null;
+            }
+            component.Update(model);
+            context.SaveChanges();
+            return component.GetViewModel;
+        }
+        public ComponentViewModel? Delete(ComponentBindingModel model)
+        {
+            using var context = new MotorPlantDatabase();
+            var element = context.Components.FirstOrDefault(rec => rec.Id == model.Id);
+            if (element == null)
+            {
+                return null;
+            }
+            context.Components.Remove(element);
+            context.SaveChanges();
+            return element.GetViewModel;
+        }
+    }
+}

MotorPlant/MotorPlantDatabaseImplement/Implements/EngineStorage.cs

@@ -0,0 +1,89 @@
+using Microsoft.EntityFrameworkCore;
+using MotorPlantContracts.BindingModels;
+using MotorPlantContracts.SearchModels;
+using MotorPlantContracts.StoragesContracts;
+using MotorPlantContracts.ViewModels;
+using MotorPlantDatabaseImplement.Models;
+
+namespace MotorPlantDatabaseImplement.Implements
+{
+    public class EngineStorage : IEngineStorage
+    {
+        public List<EngineViewModel> GetFullList()
+        {
+            using var context = new MotorPlantDatabase();
+            return context.Engines.Include(x => x.Components).ThenInclude(x => x.Component).ToList().Select(x => x.GetViewModel).ToList();
+        }
+        public List<EngineViewModel> GetFilteredList(EngineSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.EngineName))
+            {
+                return new();
+            }
+            using var context = new MotorPlantDatabase();
+            return context.Engines.Include(x => x.Components).ThenInclude(x => x.Component).Where(x => x.EngineName.Contains(model.EngineName)).ToList().Select(x => x.GetViewModel).ToList();
+
+        }
+        public EngineViewModel? GetElement(EngineSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.EngineName) &&
+            !model.Id.HasValue)
+            {
+                return null;
+            }
+            using var context = new MotorPlantDatabase();
+            return context.Engines.Include(x => x.Components).ThenInclude(x => x.Component)
+                .FirstOrDefault(x => (!string.IsNullOrEmpty(model.EngineName) && x.EngineName == model.EngineName) || (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
+        }
+        public EngineViewModel? Insert(EngineBindingModel model)
+        {
+            using var context = new MotorPlantDatabase();
+            var newEngine = Engine.Create(context, model);
+            if (newEngine == null)
+            {
+                return null;
+            }
+            context.Engines.Add(newEngine);
+            context.SaveChanges();
+            return newEngine.GetViewModel;
+        }
+        public EngineViewModel? Update(EngineBindingModel model)
+        {
+            using var context = new MotorPlantDatabase();
+            using var transaction = context.Database.BeginTransaction();
+            try
+            {
+                var engine = context.Engines.FirstOrDefault(rec =>
+                rec.Id == model.Id);
+                if (engine == null)
+                {
+                    return null;
+                }
+                engine.Update(model);
+                context.SaveChanges();
+                engine.UpdateComponents(context, model);
+                transaction.Commit();
+                return engine.GetViewModel;
+            }
+            catch
+            {
+                transaction.Rollback();
+                throw;
+            }
+        }
+        public EngineViewModel? Delete(EngineBindingModel model)
+        {
+            using var context = new MotorPlantDatabase();
+            var element = context.Engines
+            .Include(x => x.Components)
+            .FirstOrDefault(rec => rec.Id == model.Id);
+            if (element != null)
+            {
+                context.Engines.Remove(element);
+                context.SaveChanges();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+    }
+}

MotorPlant/MotorPlantDatabaseImplement/Implements/OrderStorage.cs

@@ -0,0 +1,88 @@
+using Microsoft.EntityFrameworkCore;
+using MotorPlantContracts.BindingModels;
+using MotorPlantContracts.SearchModels;
+using MotorPlantContracts.StoragesContracts;
+using MotorPlantContracts.ViewModels;
+using MotorPlantDatabaseImplement.Models;
+
+
+namespace MotorPlantDatabaseImplement.Implements
+{
+    public class OrderStorage : IOrderStorage
+    {
+        public List<OrderViewModel> GetFullList()
+        {
+            using var context = new MotorPlantDatabase();
+            return context.Orders.Include(x => x.Engine).Select(x => x.GetViewModel).ToList();
+        }
+        public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
+        {
+            if (!model.Id.HasValue)
+            {
+                return new();
+            }
+            using var context = new MotorPlantDatabase();
+            return context.Orders
+                    .Include(x => x.Engine)
+                    .Where(x => x.Id == model.Id)
+                    .Select(x => x.GetViewModel)
+                    .ToList();
+        }
+        public OrderViewModel? GetElement(OrderSearchModel model)
+        {
+            if (!model.Id.HasValue)
+            {
+                return null;
+            }
+            using var context = new MotorPlantDatabase();
+            return context.Orders.Include(x => x.Engine)
+                .FirstOrDefault(x => x.Id == model.Id)?.GetViewModel;
+        }
+        public OrderViewModel? Insert(OrderBindingModel model)
+        {
+            var newOrder = Order.Create(model);
+            if (newOrder == null)
+            {
+                return null;
+            }
+            using var context = new MotorPlantDatabase();
+            context.Orders.Add(newOrder);
+            context.SaveChanges();
+            return context.Orders
+                      .Include(x => x.Engine)
+                      .FirstOrDefault(x => x.Id == newOrder.Id)
+                      ?.GetViewModel;
+        }
+        public OrderViewModel? Update(OrderBindingModel model)
+        {
+            using var context = new MotorPlantDatabase();
+            var order = context.Orders.FirstOrDefault(x => x.Id == model.Id);
+            if (order == null)
+            {
+                return null;
+            }
+            order.Update(model);
+            context.SaveChanges();
+            return context.Orders
+                         .Include(x => x.Engine)
+                         .FirstOrDefault(x => x.Id == model.Id)
+                         ?.GetViewModel;
+        }
+        public OrderViewModel? Delete(OrderBindingModel model)
+        {
+            using var context = new MotorPlantDatabase();
+            var element = context.Orders.FirstOrDefault(rec => rec.Id == model.Id);
+            if (element != null)
+            {
+                var deletedElement = context.Orders
+                                           .Include(x => x.Engine)
+                                           .FirstOrDefault(x => x.Id == model.Id)
+                                           ?.GetViewModel;
+                context.Orders.Remove(element);
+                context.SaveChanges();
+                return deletedElement;
+            }
+            return null;
+        }
+    }
+}

MotorPlant/MotorPlantDatabaseImplement/Migrations/20240403225731_InitMigration.Designer.cs

@@ -0,0 +1,171 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using MotorPlantDatabaseImplement;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace MotorPlantDatabaseImplement.Migrations
+{
+    [DbContext(typeof(MotorPlantDatabase))]
+    [Migration("20240403225731_InitMigration")]
+    partial class InitMigration
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "7.0.16")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("MotorPlantDatabaseImplement.Models.Component", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("ComponentName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("Cost")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Components");
+                });
+
+            modelBuilder.Entity("MotorPlantDatabaseImplement.Models.Engine", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("EngineName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Engines");
+                });
+
+            modelBuilder.Entity("MotorPlantDatabaseImplement.Models.EngineComponent", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("ComponentId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("Count")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("EngineId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ComponentId");
+
+                    b.HasIndex("EngineId");
+
+                    b.ToTable("EngineComponents");
+                });
+
+            modelBuilder.Entity("MotorPlantDatabaseImplement.Models.Order", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("Count")
+                        .HasColumnType("integer");
+
+                    b.Property<DateTime>("DateCreate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<DateTime?>("DateImplement")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<int>("EngineId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("Status")
+                        .HasColumnType("integer");
+
+                    b.Property<double>("Sum")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("EngineId");
+
+                    b.ToTable("Orders");
+                });
+
+            modelBuilder.Entity("MotorPlantDatabaseImplement.Models.EngineComponent", b =>
+                {
+                    b.HasOne("MotorPlantDatabaseImplement.Models.Component", "Component")
+                        .WithMany("EngineComponents")
+                        .HasForeignKey("ComponentId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("MotorPlantDatabaseImplement.Models.Engine", "Engine")
+                        .WithMany("Components")
+                        .HasForeignKey("EngineId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Component");
+
+                    b.Navigation("Engine");
+                });
+
+            modelBuilder.Entity("MotorPlantDatabaseImplement.Models.Order", b =>
+                {
+                    b.HasOne("MotorPlantDatabaseImplement.Models.Engine", "Engine")
+                        .WithMany("Orders")
+                        .HasForeignKey("EngineId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Engine");
+                });
+
+            modelBuilder.Entity("MotorPlantDatabaseImplement.Models.Component", b =>
+                {
+                    b.Navigation("EngineComponents");
+                });
+
+            modelBuilder.Entity("MotorPlantDatabaseImplement.Models.Engine", b =>
+                {
+                    b.Navigation("Components");
+
+                    b.Navigation("Orders");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

MotorPlant/MotorPlantDatabaseImplement/Migrations/20240403225731_InitMigration.cs

@@ -0,0 +1,126 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace MotorPlantDatabaseImplement.Migrations
+{
+    /// <inheritdoc />
+    public partial class InitMigration : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "Components",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    ComponentName = table.Column<string>(type: "text", nullable: false),
+                    Cost = table.Column<double>(type: "double precision", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Components", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Engines",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    EngineName = table.Column<string>(type: "text", nullable: false),
+                    Price = table.Column<double>(type: "double precision", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Engines", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "EngineComponents",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    EngineId = table.Column<int>(type: "integer", nullable: false),
+                    ComponentId = table.Column<int>(type: "integer", nullable: false),
+                    Count = table.Column<int>(type: "integer", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_EngineComponents", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_EngineComponents_Components_ComponentId",
+                        column: x => x.ComponentId,
+                        principalTable: "Components",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_EngineComponents_Engines_EngineId",
+                        column: x => x.EngineId,
+                        principalTable: "Engines",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Orders",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    EngineId = table.Column<int>(type: "integer", nullable: false),
+                    Count = table.Column<int>(type: "integer", nullable: false),
+                    Sum = table.Column<double>(type: "double precision", nullable: false),
+                    Status = table.Column<int>(type: "integer", nullable: false),
+                    DateCreate = table.Column<DateTime>(type: "timestamp without time zone", nullable: false),
+                    DateImplement = table.Column<DateTime>(type: "timestamp without time zone", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Orders", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Orders_Engines_EngineId",
+                        column: x => x.EngineId,
+                        principalTable: "Engines",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_EngineComponents_ComponentId",
+                table: "EngineComponents",
+                column: "ComponentId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_EngineComponents_EngineId",
+                table: "EngineComponents",
+                column: "EngineId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Orders_EngineId",
+                table: "Orders",
+                column: "EngineId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "EngineComponents");
+
+            migrationBuilder.DropTable(
+                name: "Orders");
+
+            migrationBuilder.DropTable(
+                name: "Components");
+
+            migrationBuilder.DropTable(
+                name: "Engines");
+        }
+    }
+}

MotorPlant/MotorPlantDatabaseImplement/Migrations/MotorPlantDatabaseModelSnapshot.cs

@@ -0,0 +1,168 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using MotorPlantDatabaseImplement;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace MotorPlantDatabaseImplement.Migrations
+{
+    [DbContext(typeof(MotorPlantDatabase))]
+    partial class MotorPlantDatabaseModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "7.0.16")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("MotorPlantDatabaseImplement.Models.Component", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("ComponentName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("Cost")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Components");
+                });
+
+            modelBuilder.Entity("MotorPlantDatabaseImplement.Models.Engine", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("EngineName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Engines");
+                });
+
+            modelBuilder.Entity("MotorPlantDatabaseImplement.Models.EngineComponent", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("ComponentId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("Count")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("EngineId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ComponentId");
+
+                    b.HasIndex("EngineId");
+
+                    b.ToTable("EngineComponents");
+                });
+
+            modelBuilder.Entity("MotorPlantDatabaseImplement.Models.Order", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("Count")
+                        .HasColumnType("integer");
+
+                    b.Property<DateTime>("DateCreate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<DateTime?>("DateImplement")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<int>("EngineId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("Status")
+                        .HasColumnType("integer");
+
+                    b.Property<double>("Sum")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("EngineId");
+
+                    b.ToTable("Orders");
+                });
+
+            modelBuilder.Entity("MotorPlantDatabaseImplement.Models.EngineComponent", b =>
+                {
+                    b.HasOne("MotorPlantDatabaseImplement.Models.Component", "Component")
+                        .WithMany("EngineComponents")
+                        .HasForeignKey("ComponentId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("MotorPlantDatabaseImplement.Models.Engine", "Engine")
+                        .WithMany("Components")
+                        .HasForeignKey("EngineId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Component");
+
+                    b.Navigation("Engine");
+                });
+
+            modelBuilder.Entity("MotorPlantDatabaseImplement.Models.Order", b =>
+                {
+                    b.HasOne("MotorPlantDatabaseImplement.Models.Engine", "Engine")
+                        .WithMany("Orders")
+                        .HasForeignKey("EngineId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Engine");
+                });
+
+            modelBuilder.Entity("MotorPlantDatabaseImplement.Models.Component", b =>
+                {
+                    b.Navigation("EngineComponents");
+                });
+
+            modelBuilder.Entity("MotorPlantDatabaseImplement.Models.Engine", b =>
+                {
+                    b.Navigation("Components");
+
+                    b.Navigation("Orders");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

MotorPlant/MotorPlantDatabaseImplement/Models/Component.cs

@@ -0,0 +1,56 @@
+using MotorPlantDataModels.Models;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.ComponentModel.DataAnnotations;
+using MotorPlantContracts.BindingModels;
+using MotorPlantContracts.ViewModels;
+
+namespace MotorPlantDatabaseImplement.Models
+{
+    public class Component : IComponentModel
+    {
+        public int Id { get; private set; }
+        [Required]
+        public string ComponentName { get; private set; } = string.Empty;
+        [Required]
+        public double Cost { get; set; }
+        [ForeignKey("ComponentId")]
+        public virtual List<EngineComponent> EngineComponents { get; set; } = new();
+        public static Component? Create(ComponentBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Component
+            {
+                Id = model.Id,
+                ComponentName = model.ComponentName,
+                Cost = model.Cost
+            };
+        }
+        public static Component Create(ComponentViewModel model)
+        {
+            return new Component
+            {
+                Id = model.Id,
+                ComponentName = model.ComponentName,
+                Cost = model.Cost
+            };
+        }
+        public void Update(ComponentBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            ComponentName = model.ComponentName;
+            Cost = model.Cost;
+        }
+        public ComponentViewModel GetViewModel => new()
+        {
+            Id = Id,
+            ComponentName = ComponentName,
+            Cost = Cost
+        };
+    }
+}

MotorPlant/MotorPlantDatabaseImplement/Models/Engine.cs

@@ -0,0 +1,87 @@
+using MotorPlantContracts.BindingModels;
+using MotorPlantContracts.ViewModels;
+using MotorPlantDataModels.Models;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace MotorPlantDatabaseImplement.Models
+{
+    public class Engine : IEngineModel
+    {
+        public int Id { get; set; }
+        [Required]
+        public string EngineName { get; set; } = string.Empty;
+        [Required]
+        public double Price { get; set; }
+        private Dictionary<int, (IComponentModel, int)>? _engineComponents = null;
+        [NotMapped]
+        public Dictionary<int, (IComponentModel, int)> EngineComponents
+        {
+            get
+            {
+                if (_engineComponents == null)
+                {
+                    _engineComponents = Components.ToDictionary(recDC => recDC.ComponentId, recDC => (recDC.Component as IComponentModel, recDC.Count));
+                }
+                return _engineComponents;
+            }
+        }
+        [ForeignKey("EngineId")]
+        public virtual List<EngineComponent> Components { get; set; } = new();
+        [ForeignKey("EngineId")]
+        public virtual List<Order> Orders { get; set; } = new();
+        public static Engine Create(MotorPlantDatabase context, EngineBindingModel model)
+        {
+            return new Engine()
+            {
+                Id = model.Id,
+                EngineName = model.EngineName,
+                Price = model.Price,
+                Components = model.EngineComponents.Select(x => new EngineComponent
+                {
+                    Component = context.Components.First(y => y.Id == x.Key),
+                    Count = x.Value.Item2
+                }).ToList()
+            };
+        }
+        public void Update(EngineBindingModel model)
+        {
+            EngineName = model.EngineName;
+            Price = model.Price;
+        }
+        public EngineViewModel GetViewModel => new()
+        {
+            Id = Id,
+            EngineName = EngineName,
+            Price = Price,
+            EngineComponents = EngineComponents
+        };
+        public void UpdateComponents(MotorPlantDatabase context, EngineBindingModel model)
+        {
+            var engineComponents = context.EngineComponents.Where(rec => rec.EngineId == model.Id).ToList();
+            if (engineComponents != null && engineComponents.Count > 0)
+            {
+                context.EngineComponents.RemoveRange(engineComponents.Where(rec => !model.EngineComponents.ContainsKey(rec.ComponentId)));
+                context.SaveChanges();
+                foreach (var updateComponent in engineComponents)
+                {
+                    updateComponent.Count = model.EngineComponents[updateComponent.ComponentId].Item2;
+                    model.EngineComponents.Remove(updateComponent.ComponentId);
+                }
+                context.SaveChanges();
+            }
+            var engine = context.Engines.First(x => x.Id == Id);
+            foreach (var pc in model.EngineComponents)
+            {
+                context.EngineComponents.Add(new EngineComponent
+                {
+                    Engine = engine,
+                    Component = context.Components.First(x => x.Id == pc.Key),
+                    Count = pc.Value.Item2
+                });
+                context.SaveChanges();
+            }
+            _engineComponents = null;
+        }
+    }
+}

MotorPlant/MotorPlantDatabaseImplement/Models/EngineComponent.cs

@@ -0,0 +1,22 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace MotorPlantDatabaseImplement.Models
+{
+    public class EngineComponent
+    {
+        public int Id { get; set; }
+
+        [Required]
+        public int EngineId { get; set; }
+
+        [Required]
+        public int ComponentId { get; set; }
+
+        [Required]
+        public int Count { get; set; }
+
+        public virtual Component Component { get; set; } = new();
+
+        public virtual Engine Engine { get; set; } = new();
+    }
+}

MotorPlant/MotorPlantDatabaseImplement/Models/Order.cs

@@ -0,0 +1,72 @@
+using MotorPlantContracts.BindingModels;
+using MotorPlantContracts.ViewModels;
+using MotorPlantDataModels.Enums;
+using MotorPlantDataModels.Models;
+using System.ComponentModel.DataAnnotations;
+
+namespace MotorPlantDatabaseImplement.Models
+{
+    public class Order : IOrderModel
+    {
+        public int Id { get; private set; }
+
+        [Required]
+        public int EngineId { get; private set; }
+
+        [Required]
+        public int Count { get; private set; }
+
+        [Required]
+        public double Sum { get; private set; }
+
+        [Required]
+        public OrderStatus Status { get; private set; }
+
+        [Required]
+        public DateTime DateCreate { get; private set; } = DateTime.Now;
+
+        public DateTime? DateImplement { get; private set; }
+
+        public virtual Engine Engine { get; set; }
+
+        public static Order? Create(OrderBindingModel? model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Order()
+            {
+                Id = model.Id,
+                EngineId = model.EngineId,
+                Count = model.Count,
+                Sum = model.Sum,
+                Status = model.Status,
+                DateCreate = model.DateCreate,
+                DateImplement = model.DateImplement
+            };
+        }
+
+        public void Update(OrderBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            Status = model.Status;
+            DateImplement = model.DateImplement;
+        }
+
+        public OrderViewModel GetViewModel => new()
+        {
+            Id = Id,
+            EngineId = EngineId,
+            Count = Count,
+            Sum = Sum,
+            Status = Status,
+            DateCreate = DateCreate,
+            DateImplement = DateImplement,
+            EngineName = Engine.EngineName
+        };
+    }
+}

MotorPlant/MotorPlantDatabaseImplement/MotorPlantDatabase.cs

@@ -0,0 +1,23 @@
+using MotorPlantDatabaseImplement.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace MotorPlantDatabaseImplement
+{
+    public class MotorPlantDatabase : DbContext
+    {
+        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+        {
+            if (optionsBuilder.IsConfigured == false)
+            {
+                optionsBuilder.UseNpgsql(@"Host=localhost;Port=5432;Database=MotorPlant_db;Username=postgres;Password=admin");
+            }
+            base.OnConfiguring(optionsBuilder);
+            AppContext.SetSwitch("Npgsql.EnableLegacyTimestampBehavior", true);
+            AppContext.SetSwitch("Npgsql.DisableDateTimeInfinityConversions", true);
+        }
+        public virtual DbSet<Component> Components { get; set; }
+        public virtual DbSet<Engine> Engines { get; set; }
+        public virtual DbSet<EngineComponent> EngineComponents { get; set; }
+        public virtual DbSet<Order> Orders { get; set; }
+    }
+}

MotorPlant/MotorPlantDatabaseImplement/MotorPlantDatabaseImplement.csproj

@@ -0,0 +1,28 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="7.0.16" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="7.0.16" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="7.0.16">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="7.0.11" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\MotorPlantContracts\MotorPlantContracts.csproj" />
+    <ProjectReference Include="..\MotorPlantDataModels\MotorPlantDataModels.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Folder Include="Implements\" />
+  </ItemGroup>
+
+</Project>

MotorPlant/MotorPlantFileImplement/DataFileSingleton.cs

@@ -0,0 +1,61 @@
+using MotorPlantFileImplement.Models;
+using System.Xml.Linq;
+
+namespace MotorPlantFileImplement
+{
+    public class DataFileSingleton
+    {
+        private static DataFileSingleton? instance;
+
+        private readonly string ComponentFileName = "Component.xml";
+
+        private readonly string OrderFileName = "Order.xml";
+
+        private readonly string EngineFileName = "Engine.xml";
+
+        public List<Component> Components { get; private set; }
+
+        public List<Order> Orders { get; private set; }
+
+        public List<Engine> Engines { get; private set; }
+
+        public static DataFileSingleton GetInstance()
+        {
+            if (instance == null)
+            {
+                instance = new DataFileSingleton();
+            }
+            return instance;
+        }
+        public void SaveComponents() => SaveData(Components, ComponentFileName, "Components", x => x.GetXElement);
+
+        public void SaveEngines() => SaveData(Engines, EngineFileName, "Engines", x => x.GetXElement);
+
+        public void SaveOrders() => SaveData(Orders, OrderFileName, "Orders", x => x.GetXElement);
+
+        private DataFileSingleton()
+        {
+            Components = LoadData(ComponentFileName, "Component", x => Component.Create(x)!)!;
+            Engines = LoadData(EngineFileName, "Engine", x => Engine.Create(x)!)!;
+            Orders = LoadData(OrderFileName, "Order", x => Order.Create(x)!)!;
+        }
+
+        private static List<T>? LoadData<T>(string filename, string xmlNodeName, Func<XElement, T> selectFunction)
+        {
+            if (File.Exists(filename))
+            {
+                return
+               XDocument.Load(filename)?.Root?.Elements(xmlNodeName)?.Select(selectFunction)?.ToList();
+            }
+            return new List<T>();
+        }
+
+        private static void SaveData<T>(List<T> data, string filename, string xmlNodeName, Func<T, XElement> selectFunction)
+        {
+            if (data != null)
+            {
+                new XDocument(new XElement(xmlNodeName, data.Select(selectFunction).ToArray())).Save(filename);
+            }
+        }
+    }
+}

MotorPlant/MotorPlantFileImplement/Implements/ComponentStorage.cs

@@ -0,0 +1,72 @@
+using MotorPlantContracts.BindingModels;
+using MotorPlantContracts.SearchModels;
+using MotorPlantContracts.StoragesContracts;
+using MotorPlantContracts.ViewModels;
+using MotorPlantFileImplement.Models;
+
+namespace MotorPlantFileImplement.Implements
+{
+    public class ComponentStorage : IComponentStorage
+    {
+        private readonly DataFileSingleton source;
+        public ComponentStorage()
+        {
+            source = DataFileSingleton.GetInstance();
+        }
+        public List<ComponentViewModel> GetFullList()
+        {
+            return source.Components.Select(x => x.GetViewModel).ToList();
+        }
+        public List<ComponentViewModel> GetFilteredList(ComponentSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.ComponentName))
+            {
+                return new();
+            }
+            return source.Components.Where(x => x.ComponentName.Contains(model.ComponentName)).Select(x => x.GetViewModel).ToList();
+        }
+        public ComponentViewModel? GetElement(ComponentSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.ComponentName) && !model.Id.HasValue)
+            {
+                return null;
+            }
+            return source.Components.FirstOrDefault(x => (!string.IsNullOrEmpty(model.ComponentName) && x.ComponentName == model.ComponentName) ||
+            (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
+        }
+        public ComponentViewModel? Insert(ComponentBindingModel model)
+        {
+            model.Id = source.Components.Count > 0 ? source.Components.Max(x => x.Id) + 1 : 1;
+            var newComponent = Component.Create(model);
+            if (newComponent == null)
+            {
+                return null;
+            }
+            source.Components.Add(newComponent);
+            source.SaveComponents();
+            return newComponent.GetViewModel;
+        }
+        public ComponentViewModel? Update(ComponentBindingModel model)
+        {
+            var component = source.Components.FirstOrDefault(x => x.Id == model.Id);
+            if (component == null)
+            {
+                return null;
+            }
+            component.Update(model);
+            source.SaveComponents();
+            return component.GetViewModel;
+        }
+        public ComponentViewModel? Delete(ComponentBindingModel model)
+        {
+            var element = source.Components.FirstOrDefault(x => x.Id == model.Id);
+            if (element != null)
+            {
+                source.Components.Remove(element);
+                source.SaveComponents();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+    }
+}

MotorPlant/MotorPlantFileImplement/Implements/EngineStorage.cs

@@ -0,0 +1,78 @@
+using MotorPlantContracts.BindingModels;
+using MotorPlantContracts.SearchModels;
+using MotorPlantContracts.StoragesContracts;
+using MotorPlantContracts.ViewModels;
+using MotorPlantFileImplement.Models;
+
+namespace MotorPlantFileImplement.Implements
+{
+    public class EngineStorage : IEngineStorage
+    {
+        private readonly DataFileSingleton source;
+
+        public EngineStorage()
+        {
+            source = DataFileSingleton.GetInstance();
+        }
+
+        public EngineViewModel? GetElement(EngineSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.EngineName) && !model.Id.HasValue)
+            {
+                return null;
+            }
+            return source.Engines.FirstOrDefault(x => (!string.IsNullOrEmpty(model.EngineName) && x.EngineName == model.EngineName) || (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
+        }
+
+        public List<EngineViewModel> GetFilteredList(EngineSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.EngineName))
+            {
+                return new();
+            }
+            return source.Engines.Where(x => x.EngineName.Contains(model.EngineName)).Select(x => x.GetViewModel).ToList();
+        }
+
+        public List<EngineViewModel> GetFullList()
+        {
+            return source.Engines.Select(x => x.GetViewModel).ToList();
+        }
+
+        public EngineViewModel? Insert(EngineBindingModel model)
+        {
+            model.Id = source.Engines.Count > 0 ? source.Engines.Max(x => x.Id) + 1 : 1;
+            var newDoc = Engine.Create(model);
+            if (newDoc == null)
+            {
+                return null;
+            }
+            source.Engines.Add(newDoc);
+            source.SaveEngines();
+            return newDoc.GetViewModel;
+        }
+
+        public EngineViewModel? Update(EngineBindingModel model)
+        {
+            var document = source.Engines.FirstOrDefault(x => x.Id == model.Id);
+            if (document == null)
+            {
+                return null;
+            }
+            document.Update(model);
+            source.SaveEngines();
+            return document.GetViewModel;
+        }
+
+        public EngineViewModel? Delete(EngineBindingModel model)
+        {
+            var document = source.Engines.FirstOrDefault(x => x.Id == model.Id);
+            if (document == null)
+            {
+                return null;
+            }
+            document.Update(model);
+            source.SaveEngines();
+            return document.GetViewModel;
+        }
+    }
+}

MotorPlant/MotorPlantFileImplement/Implements/OrderStorage.cs

@@ -0,0 +1,91 @@
+using MotorPlantContracts.BindingModels;
+using MotorPlantContracts.SearchModels;
+using MotorPlantContracts.StoragesContracts;
+using MotorPlantContracts.ViewModels;
+using MotorPlantFileImplement.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MotorPlantFileImplement.Implements
+{
+    public class OrderStorage : IOrderStorage
+    {
+        private readonly DataFileSingleton source;
+
+        public OrderStorage()
+        {
+            source = DataFileSingleton.GetInstance();
+        }
+
+        public OrderViewModel? GetElement(OrderSearchModel model)
+        {
+            if (!model.Id.HasValue)
+            {
+                return null;
+            }
+            return GetViewModel(source.Orders.FirstOrDefault(x => model.Id.HasValue && x.Id == model.Id));
+        }
+
+        public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
+        {
+            if (!model.Id.HasValue)
+            {
+                return new();
+            }
+            return source.Orders.Where(x => x.Id == model.Id).Select(x => GetViewModel(x)).ToList();
+        }
+
+        public List<OrderViewModel> GetFullList()
+        {
+            return source.Orders.Select(x => GetViewModel(x)).ToList();
+        }
+
+        public OrderViewModel? Insert(OrderBindingModel model)
+        {
+            model.Id = source.Orders.Count > 0 ? source.Orders.Max(x => x.Id) + 1 : 1;
+            var newOrder = Order.Create(model);
+            if (newOrder == null)
+            {
+                return null;
+            }
+            source.Orders.Add(newOrder);
+            source.SaveOrders();
+            return GetViewModel(newOrder);
+        }
+
+        public OrderViewModel? Update(OrderBindingModel model)
+        {
+            var order = source.Orders.FirstOrDefault(x => x.Id == model.Id);
+            if (order == null)
+            {
+                return null;
+            }
+            order.Update(model);
+            source.SaveOrders();
+            return GetViewModel(order);
+        }
+
+        public OrderViewModel? Delete(OrderBindingModel model)
+        {
+            var order = source.Orders.FirstOrDefault(x => x.Id == model.Id);
+            if (order == null)
+            {
+                return null;
+            }
+            order.Update(model);
+            source.SaveOrders();
+            return GetViewModel(order);
+        }
+
+        private OrderViewModel GetViewModel(Order order)
+        {
+            var viewModel = order.GetViewModel;
+            var engine = source.Engines.FirstOrDefault(x => x.Id == order.EngineId);
+            viewModel.EngineName = engine?.EngineName;
+            return viewModel;
+        }
+    }
+}

MotorPlant/MotorPlantFileImplement/Models/Component.cs

@@ -0,0 +1,59 @@
+using MotorPlantContracts.BindingModels;
+using MotorPlantContracts.ViewModels;
+using MotorPlantDataModels.Models;
+using System.Xml.Linq;
+
+namespace MotorPlantFileImplement.Models
+{
+    public class Component : IComponentModel
+    {
+        public int Id { get; private set; }
+        public string ComponentName { get; private set; } = string.Empty;
+        public double Cost { get; set; }
+        public static Component? Create(ComponentBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Component()
+            {
+                Id = model.Id,
+                ComponentName = model.ComponentName,
+                Cost = model.Cost
+            };
+        }
+        public static Component? Create(XElement element)
+        {
+            if (element == null)
+            {
+                return null;
+            }
+            return new Component()
+            {
+                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
+                ComponentName = element.Element("ComponentName")!.Value,
+                Cost = Convert.ToDouble(element.Element("Cost")!.Value)
+            };
+        }
+        public void Update(ComponentBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            ComponentName = model.ComponentName;
+            Cost = model.Cost;
+        }
+        public ComponentViewModel GetViewModel => new()
+        {
+            Id = Id,
+            ComponentName = ComponentName,
+            Cost = Cost
+        };
+        public XElement GetXElement => new("Component",
+            new XAttribute("Id", Id),
+            new XElement("ComponentName", ComponentName),
+            new XElement("Cost", Cost.ToString()));
+    }
+}

MotorPlant/MotorPlantFileImplement/Models/Engine.cs

@@ -0,0 +1,91 @@
+using MotorPlantContracts.BindingModels;
+using MotorPlantContracts.ViewModels;
+using MotorPlantDataModels.Models;
+using System.Xml.Linq;
+
+namespace MotorPlantFileImplement.Models
+{
+    public class Engine : IEngineModel
+    {
+         public int Id { get; private set; }
+        public string EngineName { get; private set; } = string.Empty;
+        public double Price { get; private set; }
+        public Dictionary<int, int> Components { get; private set; } = new();
+        private Dictionary<int, (IComponentModel, int)>? _EngineComponents = null;
+        public Dictionary<int, (IComponentModel, int)> EngineComponents
+        {
+            get
+            {
+                if (_EngineComponents == null)
+                {
+                    var source = DataFileSingleton.GetInstance();
+                    _EngineComponents = Components.ToDictionary(x => x.Key, y =>
+                    ((source.Components.FirstOrDefault(z => z.Id == y.Key) as IComponentModel)!,
+                    y.Value));
+                }
+                return _EngineComponents;
+            }
+        }
+        public static Engine? Create(EngineBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Engine()
+            {
+                Id = model.Id,
+                EngineName = model.EngineName,
+                Price = model.Price,
+                Components = model.EngineComponents.ToDictionary(x => x.Key, x
+               => x.Value.Item2)
+            };
+        }
+        public static Engine? Create(XElement element)
+        {
+            if (element == null)
+            {
+                return null;
+            }
+            return new Engine()
+            {
+                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
+                EngineName = element.Element("EngineName")!.Value,
+                Price = Convert.ToDouble(element.Element("Price")!.Value),
+                Components =
+           element.Element("EngineComponents")!.Elements("EngineComponent")
+            .ToDictionary(x =>
+           Convert.ToInt32(x.Element("Key")?.Value), x =>
+           Convert.ToInt32(x.Element("Value")?.Value))
+            };
+        }
+        public void Update(EngineBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            EngineName = model.EngineName;
+            Price = model.Price;
+            Components = model.EngineComponents.ToDictionary(x => x.Key, x =>
+           x.Value.Item2);
+            _EngineComponents = null;
+        }
+        public EngineViewModel GetViewModel => new()
+        {
+            Id = Id,
+            EngineName = EngineName,
+            Price = Price,
+            EngineComponents = EngineComponents
+        };
+        public XElement GetXElement => new("Engine",
+            new XAttribute("Id", Id),
+            new XElement("EngineName", EngineName),
+            new XElement("Price", Price.ToString()),
+            new XElement("EngineComponents", Components.Select(x => new XElement("EngineComponent", 
+                                                                            new XElement("Key", x.Key), 
+                                                                            new XElement("Value", x.Value)))
+
+                                                                .ToArray()));
+    }
+}

MotorPlant/MotorPlantFileImplement/Models/Order.cs

@@ -0,0 +1,88 @@
+using MotorPlantContracts.BindingModels;
+using MotorPlantContracts.ViewModels;
+using MotorPlantDataModels.Enums;
+using MotorPlantDataModels.Models;
+using System.Xml.Linq;
+
+namespace MotorPlantFileImplement.Models
+{
+    public class Order : IOrderModel
+    {
+        public int EngineId { get; private set; }
+        public int Count { get; private set; }
+        public double Sum { get; private set; }
+        public OrderStatus Status { get; private set; } = OrderStatus.Неизвестен;
+        public DateTime DateCreate { get; private set; } = DateTime.Now;
+        public DateTime? DateImplement { get; private set; }
+        public int Id { get; private set; }
+        public static Order? Create(OrderBindingModel? model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Order()
+            {
+                Id = model.Id,
+                EngineId = model.EngineId,
+                Count = model.Count,
+                Sum = model.Sum,
+                Status = model.Status,
+                DateCreate = model.DateCreate,
+                DateImplement = model.DateImplement
+            };
+        }
+        public static Order? Create(XElement element)
+        {
+            if (element == null)
+            {
+                return null;
+            }
+            var order = new Order()
+            {
+                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
+                EngineId = Convert.ToInt32(element.Element("EngineId")!.Value),
+                Count = Convert.ToInt32(element.Element("Count")!.Value),
+                Sum = Convert.ToDouble(element.Element("Sum")!.Value),
+                DateCreate = DateTime.ParseExact(element.Element("DateCreate")!.Value, "G", null),
+            };
+            DateTime.TryParse(element.Element("DateImplement")!.Value, out DateTime dateImpl);
+
+            order.DateImplement = dateImpl;
+
+            if (!Enum.TryParse(element.Element("Status")!.Value, out OrderStatus status))
+            {
+                return null;
+            }
+            order.Status = status;
+            return order;
+        }
+        public void Update(OrderBindingModel? model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            Status = model.Status;
+            DateImplement = model.DateImplement;
+        }
+        public OrderViewModel GetViewModel => new()
+        {
+            Id = Id,
+            EngineId = EngineId,
+            Count = Count,
+            Sum = Sum,
+            Status = Status,
+            DateCreate = DateCreate,
+            DateImplement = DateImplement
+        };
+        public XElement GetXElement => new("Order",
+          new XAttribute("Id", Id),
+          new XElement("EngineId", EngineId),
+          new XElement("Count", Count.ToString()),
+          new XElement("Sum", Sum.ToString()),
+          new XElement("Status", Status.ToString()),
+          new XElement("DateCreate", DateCreate.ToString()),
+          new XElement("DateImplement", DateImplement.ToString()));
+    }
+}

MotorPlant/MotorPlantFileImplement/MotorPlantFileImplement.csproj

@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="7.0.11" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\MotorPlantContracts\MotorPlantContracts.csproj" />
+    <ProjectReference Include="..\MotorPlantDataModels\MotorPlantDataModels.csproj" />
+  </ItemGroup>
+
+</Project>

MotorPlant/MotorPlantListImplement/Models/Order.cs

@@ -49,12 +49,7 @@ namespace MotorPlantListImplement.Models
             {
                 return;
             }
-            Id = model.Id;
-            EngineId = model.EngineId;
-            Count = model.Count;
-            Sum = model.Sum;
             Status = model.Status;
-            DateCreate = model.DateCreate;
             DateImplement = model.DateImplement;
         }
         public OrderViewModel GetViewModel => new()

MotorPlant/MotorPlantListImplement/MotorPlantListImplement.csproj

@@ -6,6 +6,10 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="7.0.11" />
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\MotorPlantContracts\MotorPlantContracts.csproj" />
     <ProjectReference Include="..\MotorPlantDataModels\MotorPlantDataModels.csproj" />

MotorPlant/MotorPlantView/MotorPlantView.csproj

@@ -19,15 +19,22 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="7.0.3">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
     <PackageReference Include="Microsoft.Extensions.Configuration" Version="8.0.0" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.0" />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="8.0.0" />
     <PackageReference Include="NLog.Extensions.Logging" Version="5.3.8" />
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="7.0.11" />
   </ItemGroup>
 
   <ItemGroup>
     <ProjectReference Include="..\MotorPlantBusinessLogic\MotorPlantBusinessLogic.csproj" />
     <ProjectReference Include="..\MotorPlantContracts\MotorPlantContracts.csproj" />
+    <ProjectReference Include="..\MotorPlantDatabaseImplement\MotorPlantDatabaseImplement.csproj" />
+    <ProjectReference Include="..\MotorPlantFileImplement\MotorPlantFileImplement.csproj" />
     <ProjectReference Include="..\MotorPlantListImplement\MotorPlantListImplement.csproj" />
   </ItemGroup>
 

MotorPlant/MotorPlantView/Program.cs

@@ -1,7 +1,7 @@
 using MotorPlantView.Forms;
 using MotorPlantContracts.BusinessLogicsContracts;
 using MotorPlantContracts.StoragesContracts;
-using MotorPlantListImplement.Implements;
+using MotorPlantDatabaseImplement.Implements;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
 using NLog.Extensions.Logging;