diff --git a/Services/DeviceDialogService.cs b/Services/DeviceDialogService.cs
index 82d5282..e22eac1 100644
--- a/Services/DeviceDialogService.cs
+++ b/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();
-        return device;
+        var res=await dialog.ShowAsync();
+        if (res == ContentDialogResult.Primary)
+        {
+            return device;
+        }
+        else
+        {
+            return null;
+        }
+
     }
 }
\ No newline at end of file
diff --git a/Services/IDeviceDialogService.cs b/Services/IDeviceDialogService.cs
index 61a66b8..ad5a1a0 100644
--- a/Services/IDeviceDialogService.cs
+++ b/Services/IDeviceDialogService.cs
@@ -4,5 +4,5 @@ namespace PMSWPF.Services;
 
 public interface IDeviceDialogService
 {
-    Task<Device> ShowAddDeviceDialog(Device device);
+    Task<Device> ShowAddDeviceDialog();
 }
\ No newline at end of file
diff --git a/ViewModels/DevicesViewModel.cs b/ViewModels/DevicesViewModel.cs
index 78f6c23..1276ec8 100644
--- a/ViewModels/DevicesViewModel.cs
+++ b/ViewModels/DevicesViewModel.cs
@@ -29,11 +29,15 @@ public partial class DevicesViewModel : ViewModelBase
     {
         try
         {
-            Device device = new Device();
-            await _deviceDialogService.ShowAddDeviceDialog(device);
-            DbDevice dbDevice = new DbDevice();
-            device.CopyTo<DbDevice>(dbDevice);
-            await _devicesRepositories.Add(dbDevice);
+            
+          Device device=  await _deviceDialogService.ShowAddDeviceDialog();
+          if (device != null)
+          {
+              DbDevice dbDevice = new DbDevice();
+              device.CopyTo<DbDevice>(dbDevice);
+              await _devicesRepositories.Add(dbDevice);
+          }
+            
         }
         catch (DbExistException e)
         {