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WinFormsProject/AppView/AppView.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net6.0-windows</TargetFramework>
+    <Nullable>enable</Nullable>
+    <UseWindowsForms>true</UseWindowsForms>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="7.0.14">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\DateBaseImplement\DateBaseImplement.csproj" />
+  </ItemGroup>
+
+</Project>

WinFormsProject/AppView/Form1.Designer.cs

@@ -0,0 +1,39 @@
+namespace AppView
+{
+    partial class Form1
+    {
+        /// <summary>
+        ///  Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        ///  Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        ///  Required method for Designer support - do not modify
+        ///  the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            this.components = new System.ComponentModel.Container();
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.ClientSize = new System.Drawing.Size(800, 450);
+            this.Text = "Form1";
+        }
+
+        #endregion
+    }
+}

WinFormsProject/AppView/Form1.cs

@@ -0,0 +1,10 @@
+namespace AppView
+{
+    public partial class Form1 : Form
+    {
+        public Form1()
+        {
+            InitializeComponent();
+        }
+    }
+}

WinFormsProject/AppView/Form1.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

WinFormsProject/AppView/Program.cs

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+namespace AppView
+{
+    internal static class Program
+    {
+        /// <summary>
+        ///  The main entry point for the application.
+        /// </summary>
+        [STAThread]
+        static void Main()
+        {
+            // To customize application configuration such as set high DPI settings or default font,
+            // see https://aka.ms/applicationconfiguration.
+            ApplicationConfiguration.Initialize();
+            Application.Run(new Form1());
+        }
+    }
+}

WinFormsProject/Contracts/BindingModels/ProviderBindingModel.cs

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+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.BindingModels
+{
+    public class ProviderBindingModel : IProviderModel
+    {
+        public string Name { get; set; }
+        public string Type { get; set; }
+        public byte[] Logo { get; set; }
+        public string Number { get; set;  }
+
+        public int Id { get; set; }
+
+        public ProviderBindingModel() { }
+
+        public ProviderBindingModel(IProviderModel provider)
+        {
+            Id = provider.Id;
+        }
+    }
+}

WinFormsProject/Contracts/BindingModels/TypeBindingModel.cs

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+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.BindingModels
+{
+    public class TypeBindingModel : ITypeModel
+    {
+        public string Name { get; set; }
+        public int Id { get; set; }
+
+        public TypeBindingModel() { }
+
+        public TypeBindingModel(ITypeModel type)
+        {
+            Id = type.Id;
+        }
+    }
+}

WinFormsProject/Contracts/Contracts.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\DataModels\DataModels.csproj" />
+  </ItemGroup>
+
+</Project>

WinFormsProject/Contracts/SearchModels/ProviderSearchModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.SearchModels
+{
+    public class ProviderSearchModel
+    {
+        public int? Id { get; set; }
+    }
+}

WinFormsProject/Contracts/SearchModels/TypeSearchModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.SearchModels
+{
+    public class TypeSearchModel
+    {
+        public int? Id { get; set; }
+    }
+}

WinFormsProject/Contracts/StorageContracts/IProviderStorage.cs

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+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.StorageContracts
+{
+    public interface IProviderStorage
+    {
+        List<ProviderViewModel> GetFullList();
+        ProviderViewModel? GetElement(ProviderSearchModel model);
+        List<ProviderViewModel> GetFilteredList(ProviderSearchModel model);
+        ProviderViewModel? Insert(ProviderBindingModel model);
+        ProviderViewModel? Update(ProviderBindingModel model);
+        ProviderViewModel? Delete(ProviderBindingModel model);
+    }
+}

WinFormsProject/Contracts/StorageContracts/ITypeStorage.cs

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+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.StorageContracts
+{
+    public interface ITypeStorage
+    {
+        List<TypeViewModel> GetFullList();
+        TypeViewModel? GetElement(TypeSearchModel model);
+        TypeViewModel? Insert(TypeBindingModel model);
+        TypeViewModel? Update(TypeBindingModel model);
+        TypeViewModel? Delete(TypeBindingModel model);
+    }
+}

WinFormsProject/Contracts/ViewModels/ProviderViewModel.cs

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+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.ViewModels
+{
+    public class ProviderViewModel : IProviderModel
+    {
+        public string Name { get; set; }
+        public string Type { get; set; }
+        public byte[] Logo { get; set; }
+        public string Number { get; set; }
+        public int Id { get; set; }
+    }
+}

WinFormsProject/Contracts/ViewModels/TypeViewModel.cs

@@ -0,0 +1,15 @@
+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.ViewModels
+{
+    public class TypeViewModel : ITypeModel
+    {
+        public string Name { get; set; }
+        public int Id { get; set; }
+    }
+}

WinFormsProject/DataModels/DataModels.csproj

@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

WinFormsProject/DataModels/IId.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DataModels
+{
+    public interface IId
+    {
+        int Id { get; }
+    }
+}

WinFormsProject/DataModels/Models/IProviderModel.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DataModels.Models
+{
+    public interface IProviderModel : IId
+    {
+        string Name { get; set; }
+        string Type { get; set; }
+        byte[] Logo { get; set; }
+        string Number { get; set; }
+    }
+}

WinFormsProject/DataModels/Models/ITypeModel.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DataModels.Models
+{
+    public interface ITypeModel : IId
+    {
+        string Name { get; set; }
+    }
+}

WinFormsProject/DateBaseImplement/DBContext.cs

@@ -0,0 +1,24 @@
+using DateBaseImplement.Models;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DateBaseImplement
+{
+    public class DBContext : DbContext
+    {
+        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+        {
+            if (!optionsBuilder.IsConfigured)
+                optionsBuilder.UseNpgsql(@"Host=localhost;Port=5432;Database=COP;Username=postgres;Password=postgres");
+            base.OnConfiguring(optionsBuilder);
+        }
+
+        public virtual DbSet<Provider> Providers { get; set; }
+        public virtual DbSet<Models.Type> Types { get; set; }
+    }
+}

WinFormsProject/DateBaseImplement/DateBaseImplement.csproj

@@ -0,0 +1,22 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="7.0.14">
+      <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="..\Contracts\Contracts.csproj" />
+    <ProjectReference Include="..\DataModels\DataModels.csproj" />
+  </ItemGroup>
+
+</Project>

WinFormsProject/DateBaseImplement/Implements/ProviderStorage.cs

@@ -0,0 +1,73 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.StorageContracts;
+using Contracts.ViewModels;
+using DateBaseImplement.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DateBaseImplement.Implements
+{
+    public class ProviderStorage : IProviderStorage
+    {
+        public ProviderViewModel? Insert(ProviderBindingModel model)
+        {
+            var newProvider = Provider.Create(model);
+            if (newProvider == null) return null;
+
+            using var context = new DBContext();
+            context.Providers.Add(newProvider);
+            context.SaveChanges();
+            return newProvider.GetViewModel;
+        } 
+
+        public ProviderViewModel? Update(ProviderBindingModel model)
+        {
+            using var context = new DBContext();
+            var provider = context.Providers.FirstOrDefault(x => x.Id == model.Id);
+            if (provider == null) return null;
+            provider.Update(model);
+            context.SaveChanges();
+            return provider.GetViewModel;
+        }
+
+        public ProviderViewModel? Delete(ProviderBindingModel model)
+        {
+            using var context = new DBContext();
+            var element = context.Providers.FirstOrDefault(x => x.Id == model.Id);
+            if (element == null) return null;
+            context.Providers.Remove(element);
+            context.SaveChanges();
+            return element.GetViewModel;
+        }
+
+        public ProviderViewModel? GetElement(ProviderSearchModel model)
+        {
+            if (!model.Id.HasValue) return null;
+            using var context = new DBContext();
+            return context.Providers
+                .FirstOrDefault(x => model.Id.HasValue && x.Id == model.Id)?
+                .GetViewModel;
+        }
+
+        public List<ProviderViewModel> GetFullList()
+        {
+            using var context = new DBContext();
+            return context.Providers
+                .Select(x => x.GetViewModel)
+                .ToList();
+        }
+
+        public List<ProviderViewModel> GetFilteredList(ProviderSearchModel model)
+        {
+            using var context = new DBContext();
+            return context.Providers
+                .Where(x => model.Id.HasValue && x.Id == model.Id)
+                .Select(x => x.GetViewModel)
+                .ToList();
+        }
+    }
+}

WinFormsProject/DateBaseImplement/Implements/TypeStorage.cs

@@ -0,0 +1,62 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.StorageContracts;
+using Contracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DateBaseImplement.Implements
+{
+    public class TypeStorage : ITypeStorage
+    {
+        public TypeViewModel? Insert(TypeBindingModel model)
+        {
+            var newType = Models.Type.Create(model);
+            if (newType == null) return null;
+            using var context = new DBContext();
+            context.Types.Add(newType);
+            context.SaveChanges();
+            return newType.GetViewModel;
+        }
+
+        public TypeViewModel? Update(TypeBindingModel model)
+        {
+            using var context = new DBContext();
+            var type = context.Types.FirstOrDefault(x => x.Id == model.Id);
+            if (type == null) return null;
+            type.Update(model);
+            context.SaveChanges();
+            return type.GetViewModel;
+        }
+
+        public TypeViewModel? Delete(TypeBindingModel model)
+        {
+            using var context = new DBContext();
+            var type = context.Types.FirstOrDefault(x => x.Id == model.Id);
+            if (type == null) return null;
+            context.Types.Remove(type);
+            context.SaveChanges();
+            return type.GetViewModel;
+        }
+
+        public TypeViewModel? GetElement(TypeSearchModel model)
+        {
+            if (!model.Id.HasValue) return null;
+            using var context = new DBContext();
+            return context.Types
+                .FirstOrDefault(x => model.Id.HasValue && x.Id == model.Id)
+                ?.GetViewModel;
+        }
+
+        public List<TypeViewModel> GetFullList()
+        {
+            using var context = new DBContext();
+            return context.Types
+                .Select(x => x.GetViewModel)
+                .ToList();
+        }
+    }
+}

WinFormsProject/DateBaseImplement/Migrations/20231115184705_initMigration.Designer.cs

@@ -0,0 +1,75 @@
+// <auto-generated />
+using DateBaseImplement;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace DateBaseImplement.Migrations
+{
+    [DbContext(typeof(DBContext))]
+    [Migration("20231115184705_initMigration")]
+    partial class initMigration
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "7.0.14")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("DateBaseImplement.Models.Provider", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<byte[]>("Logo")
+                        .IsRequired()
+                        .HasColumnType("bytea");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Number")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Type")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Providers");
+                });
+
+            modelBuilder.Entity("DateBaseImplement.Models.Type", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Types");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

WinFormsProject/DateBaseImplement/Migrations/20231115184705_initMigration.cs

@@ -0,0 +1,54 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace DateBaseImplement.Migrations
+{
+    /// <inheritdoc />
+    public partial class initMigration : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "Providers",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    Name = table.Column<string>(type: "text", nullable: false),
+                    Logo = table.Column<byte[]>(type: "bytea", nullable: false),
+                    Type = table.Column<string>(type: "text", nullable: false),
+                    Number = table.Column<string>(type: "text", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Providers", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Types",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    Name = table.Column<string>(type: "text", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Types", x => x.Id);
+                });
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "Providers");
+
+            migrationBuilder.DropTable(
+                name: "Types");
+        }
+    }
+}

WinFormsProject/DateBaseImplement/Migrations/DBContextModelSnapshot.cs

@@ -0,0 +1,72 @@
+// <auto-generated />
+using DateBaseImplement;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace DateBaseImplement.Migrations
+{
+    [DbContext(typeof(DBContext))]
+    partial class DBContextModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "7.0.14")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("DateBaseImplement.Models.Provider", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<byte[]>("Logo")
+                        .IsRequired()
+                        .HasColumnType("bytea");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Number")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Type")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Providers");
+                });
+
+            modelBuilder.Entity("DateBaseImplement.Models.Type", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Types");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

WinFormsProject/DateBaseImplement/Models/Provider.cs

@@ -0,0 +1,62 @@
+using Contracts.BindingModels;
+using Contracts.ViewModels;
+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DateBaseImplement.Models
+{
+    public class Provider : IProviderModel
+    {
+        public int Id { get; set; }
+
+        [Required]
+        public string Name { get; set; }
+
+        [Required]
+        public byte[] Logo { get; set; }
+
+        [Required]
+        public string Type { get; set; }
+
+        [Required]
+        public string Number { get; set; }
+
+        public static Provider? Create(ProviderBindingModel model)
+        {
+            if (model == null) return null;
+
+            return new Provider() 
+            {
+                Id = model.Id,
+                Name = model.Name,
+                Type = model.Type,
+                Logo = model.Logo,
+                Number = model.Number,
+            };
+        }
+
+        public void Update(ProviderBindingModel model)
+        {
+            if (model == null) return;
+
+            Name = model.Name;
+            Type = model.Type;
+            Logo = model.Logo;
+            Number = model.Number;
+        }
+
+        public ProviderViewModel GetViewModel => new()
+        {
+            Id = Id,
+            Name = Name,
+            Type = Type,
+            Logo = Logo,
+            Number = Number,
+        };
+    }
+}

WinFormsProject/DateBaseImplement/Models/Type.cs

@@ -0,0 +1,42 @@
+using Contracts.BindingModels;
+using Contracts.ViewModels;
+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DateBaseImplement.Models
+{
+    public class Type : ITypeModel
+    {
+        public int Id { get; set; }
+        [Required]
+        public string Name { get; set; }
+
+        public static Type? Create(TypeBindingModel model)
+        {
+            if (model == null) return null;
+
+            return new Type()
+            {
+                Name = model.Name,
+            };
+        }
+
+        public void Update(TypeBindingModel model)
+        {
+            if (model == null) return;
+            model.Name = Name;
+        }
+
+        public TypeViewModel GetViewModel => new()
+        {
+            Id = Id,
+            Name = Name,
+        };
+    }
+}

WinFormsProject/WinFormsProject.sln

@@ -3,9 +3,17 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.3.32819.101
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WinFormsProject", "WinFormsProject\WinFormsProject.csproj", "{1FC6ABE3-DF27-453A-B2EE-FA17C71C9CF0}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "WinFormsProject", "WinFormsProject\WinFormsProject.csproj", "{1FC6ABE3-DF27-453A-B2EE-FA17C71C9CF0}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WinFormsLibrary", "WinFormsLibrary\WinFormsLibrary.csproj", "{CF6B5601-DC60-48A2-8BDC-1CE32E3F6F15}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "WinFormsLibrary", "WinFormsLibrary\WinFormsLibrary.csproj", "{CF6B5601-DC60-48A2-8BDC-1CE32E3F6F15}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DataModels", "DataModels\DataModels.csproj", "{23F0E442-0283-4192-A17B-D13D0C01C10D}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Contracts", "Contracts\Contracts.csproj", "{6A196E6B-91D9-4873-9E5F-0D96D18A74F5}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DateBaseImplement", "DateBaseImplement\DateBaseImplement.csproj", "{F53D2EB4-F1EB-4C24-987C-CCC6BFC5FAD7}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AppView", "AppView\AppView.csproj", "{294B81DD-546F-40AD-9BCE-0F51F1D17D1A}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -21,6 +29,22 @@ Global
 		{CF6B5601-DC60-48A2-8BDC-1CE32E3F6F15}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{CF6B5601-DC60-48A2-8BDC-1CE32E3F6F15}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{CF6B5601-DC60-48A2-8BDC-1CE32E3F6F15}.Release|Any CPU.Build.0 = Release|Any CPU
+		{23F0E442-0283-4192-A17B-D13D0C01C10D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{23F0E442-0283-4192-A17B-D13D0C01C10D}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{23F0E442-0283-4192-A17B-D13D0C01C10D}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{23F0E442-0283-4192-A17B-D13D0C01C10D}.Release|Any CPU.Build.0 = Release|Any CPU
+		{6A196E6B-91D9-4873-9E5F-0D96D18A74F5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{6A196E6B-91D9-4873-9E5F-0D96D18A74F5}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{6A196E6B-91D9-4873-9E5F-0D96D18A74F5}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{6A196E6B-91D9-4873-9E5F-0D96D18A74F5}.Release|Any CPU.Build.0 = Release|Any CPU
+		{F53D2EB4-F1EB-4C24-987C-CCC6BFC5FAD7}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F53D2EB4-F1EB-4C24-987C-CCC6BFC5FAD7}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F53D2EB4-F1EB-4C24-987C-CCC6BFC5FAD7}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F53D2EB4-F1EB-4C24-987C-CCC6BFC5FAD7}.Release|Any CPU.Build.0 = Release|Any CPU
+		{294B81DD-546F-40AD-9BCE-0F51F1D17D1A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{294B81DD-546F-40AD-9BCE-0F51F1D17D1A}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{294B81DD-546F-40AD-9BCE-0F51F1D17D1A}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{294B81DD-546F-40AD-9BCE-0F51F1D17D1A}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE