diff --git a/ProjectCompanyFurniture/ProjectCompanyFurniture/Forms/FormInvoice.cs b/ProjectCompanyFurniture/ProjectCompanyFurniture/Forms/FormInvoice.cs
index ab54160..4433057 100644
--- a/ProjectCompanyFurniture/ProjectCompanyFurniture/Forms/FormInvoice.cs
+++ b/ProjectCompanyFurniture/ProjectCompanyFurniture/Forms/FormInvoice.cs
@@ -25,11 +25,11 @@ namespace ProjectCompanyFurniture.Forms
 
             comboBoxClient.DataSource = clientRepository.ReadClients();
             comboBoxClient.DisplayMember = "FirstName";
-            comboBoxClient.ValueMember = "Id";
+            comboBoxClient.ValueMember = "ID";
 
             ColumnProduct.DataSource = productRepository.ReadProducts();
             ColumnProduct.DisplayMember = "Name";
-            ColumnProduct.ValueMember = "Id";
+            ColumnProduct.ValueMember = "ID";
         }
 
         private void ButtonSave_Click(object sender, EventArgs e)
diff --git a/ProjectCompanyFurniture/ProjectCompanyFurniture/ProjectCompanyFurniture.csproj b/ProjectCompanyFurniture/ProjectCompanyFurniture/ProjectCompanyFurniture.csproj
index 36b824f..68c312c 100644
--- a/ProjectCompanyFurniture/ProjectCompanyFurniture/ProjectCompanyFurniture.csproj
+++ b/ProjectCompanyFurniture/ProjectCompanyFurniture/ProjectCompanyFurniture.csproj
@@ -45,6 +45,9 @@
   </ItemGroup>
 
   <ItemGroup>
+    <None Update="appsettings.json">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
     <None Update="Properties\Settings.settings">
       <Generator>SettingsSingleFileGenerator</Generator>
       <LastGenOutput>Settings.Designer.cs</LastGenOutput>
diff --git a/ProjectCompanyFurniture/ProjectCompanyFurniture/Repositories/Implementations/ConnectionString.cs b/ProjectCompanyFurniture/ProjectCompanyFurniture/Repositories/Implementations/ConnectionString.cs
index ccc3216..36ec3c1 100644
--- a/ProjectCompanyFurniture/ProjectCompanyFurniture/Repositories/Implementations/ConnectionString.cs
+++ b/ProjectCompanyFurniture/ProjectCompanyFurniture/Repositories/Implementations/ConnectionString.cs
@@ -6,7 +6,7 @@ using System.Threading.Tasks;
 
 namespace ProjectCompanyFurniture.Repositories.Implementations;
 
-public class ConnectionString : IConnectionString
+public class ConnectionString : IConnectionString 
 {
-    string IConnectionString.ConnectionString => "";
+    string IConnectionString.ConnectionString => "Driver={PostgreSQL};Server=localhost;Port=5432;Database=furnitureotp;Uid=postgres;Pwd=postgres";
 }
diff --git a/ProjectCompanyFurniture/ProjectCompanyFurniture/Repositories/Implementations/InvoiceRepository.cs b/ProjectCompanyFurniture/ProjectCompanyFurniture/Repositories/Implementations/InvoiceRepository.cs
index 2ca394b..451e062 100644
--- a/ProjectCompanyFurniture/ProjectCompanyFurniture/Repositories/Implementations/InvoiceRepository.cs
+++ b/ProjectCompanyFurniture/ProjectCompanyFurniture/Repositories/Implementations/InvoiceRepository.cs
@@ -1,7 +1,10 @@
-using Microsoft.Extensions.Logging;
+using Dapper;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
 using ProjectCompanyFurniture.Entities;
 using System;
 using System.Collections.Generic;
+using System.Data.SqlClient;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
@@ -21,14 +24,72 @@ public class InvoiceRepository : IInvoiceRepository
 
     public void CreateInvoice(Invoice invoice)
     {
+        _logger.LogInformation("Добавление объекта");
+        _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(invoice));
+        try
+        {
+            using var connection = new SqlConnection(_connectionString.ConnectionString);
+            connection.Open();
+            using var transaction = connection.BeginTransaction();
+            var queryInsert = @"INSERT INTO Invoices (ClientID, AvailabilityOfPromotionalCode, 
+                                                        DiscountPercentage, SellingPrice, Data)
+                                VALUES (@ClientID, @AvailabilityOfPromotionalCode, 
+                                                        @DiscountPercentage, @SellingPrice, @Data);
+                                SELECT MAX(Id) FROM FeedReplenishments";
+            var invoiceID = connection.QueryFirst<int>(queryInsert, invoice, transaction);
+            var querySubInsert = @"INSERT INTO InvoiceProducts (InvoiceId, ProductId, Count, SellingPrice)
+                                    VALUES (@InvoiceId, @ProductId, @Count, @SellingPrice)";
+            foreach (var elem in invoice.Products)
+            {
+                connection.Execute(querySubInsert, new
+                {
+                    invoiceID,
+                    elem.ProductID,
+                    elem.Count
+                }, transaction);
+            }
+            transaction.Commit();
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при добавлении объекта");
+            throw;
+        }
     }
 
     public void DeleteInvoice(int id)
     {
+        _logger.LogInformation("Удаление объекта");
+        _logger.LogDebug("Объект: {id}", id);
+        try
+        {
+            using var connection = new SqlConnection(_connectionString.ConnectionString);
+            var queryDelete = @"DELETE FROM Invoices
+                                WHERE ID=@id";
+            connection.Execute(queryDelete, new { id });
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при удалении объекта");
+            throw;
+        }
     }
 
     public IEnumerable<Invoice> ReadInvoices(DateTime? dateForm = null, DateTime? dateTo = null, int? clientId = null)
     {
-        return [];
+        _logger.LogInformation("Получение всех объектов");
+        try
+        {
+            using var connection = new SqlConnection(_connectionString.ConnectionString);
+            var querySelect = @"SELECT * FROM Invoices";
+            var invoices = connection.Query<Invoice>(querySelect);
+            _logger.LogDebug("Полученные объекты: {json}", JsonConvert.SerializeObject(invoices));
+            return invoices;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при чтении объектов");
+            throw;
+        }
     }
 }