Переделал

Database/EmployeeRepository.cs

@@ -15,10 +15,10 @@ public class EmployeeRepository
         connection = new MySqlConnection(connect.Value.ConnectionString);
     }
 
-    public List<Employee> GetEmployees(Position position)
+    public List<Employee> GetEmployees()
     {
         List<Employee> result = new();
-        string sql = "select * from `employee` where position_id = " + position.Id;
+        string sql = "select e.id as eid, e.position_id as pid, e.name as ename, e.surname as esurname, p.name as pname from employee e join position p on e.position_id = p.id";
         try
         {
             connection.Open();
@@ -29,11 +29,20 @@ public class EmployeeRepository
                 {
                     result.Add(new Employee
                     {
+                        /*
                         Id = reader.GetInt32("id"),
                         Name = reader.GetString("name"),
                         Surname = reader.GetString("surname"),
-                        OnWork = reader.GetBoolean("on_work"),
                         PositionId = reader.GetInt32("position_id"),
+                        */
+                        Id = reader.GetInt32("eid"),
+                        Name = reader.GetString("ename"),
+                        Surname = reader.GetString("esurname"),
+                        Position = new Position()
+                        {
+                            Id = reader.GetInt32("pid"),
+                            Name = reader.GetString("name"),
+                        }
                     });
                 }
             }
@@ -57,7 +66,6 @@ public class EmployeeRepository
             {
                 command.Parameters.AddWithValue("@name", employee.Name);
                 command.Parameters.AddWithValue("@surname", employee.Surname);
-                command.Parameters.AddWithValue("@on_work", employee.OnWork);
                 command.Parameters.AddWithValue("@position_id", employee.PositionId);
                 command.ExecuteNonQuery();
             }
@@ -82,7 +90,6 @@ public class EmployeeRepository
             {
                 command.Parameters.AddWithValue("@name", employee.Name);
                 command.Parameters.AddWithValue("@surname", employee.Surname);
-                command.Parameters.AddWithValue("@on_work", employee.OnWork);
                 command.Parameters.AddWithValue("@position_id", employee.PositionId);
                 command.ExecuteNonQuery();
             }

Models/Employee.cs

@@ -5,6 +5,6 @@ public class Employee
     public int Id { get; set; }
     public string Name { get; set; }
     public string Surname { get; set; }
-    public bool OnWork { get; set; }
     public int PositionId { get; set; }
+    public Position Position { get; set; }
 }

ViewModels/MainWindowViewModel.cs

@@ -13,6 +13,7 @@ public partial class MainWindowViewModel : ViewModelBase
     private readonly OrderRepository _orderRepository;
     
     [ObservableProperty] List<Order> orders;
+    [ObservableProperty] List<Employee> employees;
 
     public MainWindowViewModel(IServiceProvider serviceProvider, EmployeeRepository employeeRepository, OrderRepository orderRepository)
     {
@@ -20,6 +21,7 @@ public partial class MainWindowViewModel : ViewModelBase
         _employeeRepository = employeeRepository;
         _orderRepository = orderRepository;
 
+        Employees = employeeRepository.GetEmployees();
         Orders = orderRepository.GetOrders();
     }
 }

Views/MainWindow.axaml

@@ -16,17 +16,24 @@
                                                 <DataGrid ItemsSource="{Binding Orders}" AutoGenerateColumns="False">
                                                         <DataGrid.Columns>
                                                                 <DataGridTextColumn Header="Дата заказа" Binding="{Binding OrderDate}"/>
-                                                                <DataGridTextColumn Header="ID клиента" Binding="{Binding ClientId}"/>
+                                                                <DataGridTextColumn Header="Имя клиента" Binding="{Binding Client.Name}"/>
-                                                                <DataGridTextColumn Header="ID скидки" Binding="{Binding DiscountId}"/>
+                                                                <DataGridTextColumn Header="Фамилия клиента" Binding="{Binding Client.Name}"/>
-                                                                <DataGridTextColumn Header="ID Сотрудника" Binding="{Binding EmployeeId}"/>
+                                                                <DataGridTextColumn Header="Название услуги" Binding="{Binding Service.Name}"/>
-                                                                <DataGridTextColumn Header="ID услуги" Binding="{Binding ServiceId}"/>
+                                                                <DataGridTextColumn Header="Имя сотрудника" Binding="{Binding Employee.Name}"/>
-                                                                <DataGridTextColumn Header="ID зоны" Binding="{Binding ZoneId}"/>
+                                                                <DataGridTextColumn Header="Фамилия сотрудника" Binding="{Binding Employee.Surname}"/>
+                                                                <DataGridTextColumn Header="Название зоны" Binding="{Binding Zone.Name}"/>
                                                                 <DataGridTextColumn Header="Окончательная цена" Binding="{Binding FinalPrice}"/>
                                                         </DataGrid.Columns>
                                                 </DataGrid>
                                         </TabItem>
                                         <TabItem Header="Сотрудники">
-                                                
+                                                <DataGrid ItemsSource="{Binding Employees}" AutoGenerateColumns="False">
+                                                        <DataGrid.Columns>
+                                                                <DataGridTextColumn Header="Имя сотрудника" Binding="{Binding Name}"/>
+                                                                <DataGridTextColumn Header="Фамилия сотрудника" Binding="{Binding Surname}"/>
+                                                                <DataGridTextColumn Header="Должность сотрудника" Binding="{Binding Position.Name}"/>
+                                                        </DataGrid.Columns>
+                                                </DataGrid>
                                         </TabItem>
                                 </TabControl>
                         </TabItem>

obj/Debug/net10.0/BathHouseManagmet.AssemblyInfo.cs

@@ -13,7 +13,7 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyCompanyAttribute("BathHouseManagmet")]
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+55e84ef57c6abfe4ef4f4ef588ea91f719ce8536")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+4e1ab770f1b973c62387290bf8e7c9407bc2cd2a")]
 [assembly: System.Reflection.AssemblyProductAttribute("BathHouseManagmet")]
 [assembly: System.Reflection.AssemblyTitleAttribute("BathHouseManagmet")]
 [assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]

obj/Debug/net10.0/BathHouseManagmet.AssemblyInfoInputs.cache

@@ -1 +1 @@
-af96d54e4de83c2d92c24c535a5ffbc3bfff4696e1e3b1ef13b37dfd8a84647a
+f47cb2fe8a4221890c3e523f6ef8a05ece1d4ec0d2150086183c9d3e4a5ddd93