refactor:完成重构设备的添加，删除，更新。

DMS.WPF/ViewModels/Dialogs/ImportExcelDialogViewModel.cs

@@ -9,10 +9,11 @@ using DMS.Core.Models;
 using DMS.WPF.Interfaces;
 using DMS.WPF.Services;
 using DMS.WPF.ItemViewModel;
+using System.Threading.Tasks;
 
 namespace DMS.WPF.ViewModels.Dialogs;
 
-public partial class ImportExcelDialogViewModel : DialogViewModelBase<List<Variable>>
+public partial class ImportExcelDialogViewModel : DialogViewModelBase<List<VariableItem>>
 {
     private readonly IMapper _mapper;
     private readonly IExcelService _excelService;
@@ -57,21 +58,21 @@ public partial class ImportExcelDialogViewModel : DialogViewModelBase<List<Varia
     }
     
     [RelayCommand]
-    private void ImportAll()
+    private async Task ImportAll()
     {
-         Close(Variables);
+        await Close(VariableItemViewModels.ToList());
     }
 
     [RelayCommand]
-    private void ImportSelected()
+    private async Task ImportSelected()
     {
         var selected = SelectedVariables.Cast<VariableItem>().ToList();
-        Close(_mapper.Map<List<Variable>>(selected));
+       await Close(selected);
     }
 
     [RelayCommand]
-    private void CancleButton()
+    private async Task CancleButton()
     {
-        Close(null);
+       await Close(null);
     }
 }