实现了添加设备的功能，并写了Object对象的扩展CopyTo方法，实现了数据表的创建。

ViewModels/DevicesViewModel.cs

@@ -1,4 +1,10 @@
-using CommunityToolkit.Mvvm.Input;
+using System.Windows;
+using CommunityToolkit.Mvvm.Input;
+using PMSWPF.Data.Entities;
+using PMSWPF.Data.Repositories;
+using PMSWPF.Excptions;
+using PMSWPF.Extensions;
+using PMSWPF.Helper;
 using PMSWPF.Models;
 using PMSWPF.Services;
 using PMSWPF.ViewModels.Dialogs;
@@ -9,17 +15,36 @@ namespace PMSWPF.ViewModels;
 public partial class DevicesViewModel : ViewModelBase
 {
     private readonly IDeviceDialogService _deviceDialogService;
+    private readonly DevicesRepositories _devicesRepositories;
 
-    public DevicesViewModel(IDeviceDialogService deviceDialogService)
+    public DevicesViewModel(IDeviceDialogService deviceDialogService,DevicesRepositories devicesRepositories)
     {
         _deviceDialogService = deviceDialogService;
+        _devicesRepositories = devicesRepositories;
     }
 
 
     [RelayCommand]
     public async void AddDevice()
     {
-        Device device = new Device();
-        await _deviceDialogService.ShowAddDeviceDialog(device);
+        try
+        {
+            Device device = new Device();
+            await _deviceDialogService.ShowAddDeviceDialog(device);
+            DbDevice dbDevice = new DbDevice();
+            device.CopyTo<DbDevice>(dbDevice);
+            await _devicesRepositories.Add(dbDevice);
+        }
+        catch (DbExistException e)
+        {
+            Console.WriteLine(e);
+            MessageBox.Show(e.Message);
+
+        }
+        catch (Exception e)
+        {
+            Console.WriteLine(e);
+            MessageBox.Show(e.Message);
+        }
     }
 }