修复了添加设备的一些问题

Services/DeviceDialogService.cs

@@ -1,4 +1,5 @@
-using PMSWPF.Models;
+using iNKORE.UI.WPF.Modern.Controls;
+using PMSWPF.Models;
 using PMSWPF.ViewModels.Dialogs;
 using PMSWPF.Views.Dialogs;
 
@@ -6,15 +7,24 @@ namespace PMSWPF.Services;
 
 public class DeviceDialogService : IDeviceDialogService
 {
-    public async Task<Device> ShowAddDeviceDialog(Device device)
+    public async Task<Device> ShowAddDeviceDialog()
     {
+        Device device = new Device();
         DeviceDialogViewModel ddvm = new DeviceDialogViewModel(device)
         {
             Title = "添加设备"
         };
 
         DeviceDialog dialog = new DeviceDialog(ddvm);
-        await dialog.ShowAsync();
+        var res=await dialog.ShowAsync();
+        if (res == ContentDialogResult.Primary)
+        {
             return device;
         }
+        else
+        {
+            return null;
+        }
+
+    }
 }

Services/IDeviceDialogService.cs

@@ -4,5 +4,5 @@ namespace PMSWPF.Services;
 
 public interface IDeviceDialogService
 {
-    Task<Device> ShowAddDeviceDialog(Device device);
+    Task<Device> ShowAddDeviceDialog();
 }

ViewModels/DevicesViewModel.cs

@@ -29,12 +29,16 @@ public partial class DevicesViewModel : ViewModelBase
     {
         try
         {
-            Device device = new Device();
-            await _deviceDialogService.ShowAddDeviceDialog(device);
+            
+          Device device=  await _deviceDialogService.ShowAddDeviceDialog();
+          if (device != null)
+          {
               DbDevice dbDevice = new DbDevice();
               device.CopyTo<DbDevice>(dbDevice);
               await _devicesRepositories.Add(dbDevice);
           }
+            
+        }
         catch (DbExistException e)
         {
             Console.WriteLine(e);