1 feat: 为MqttServerDetailView添加取消关联功能

2
   3 - 在MqttServerDetailView的DataGrid右键菜单中添加"取消关联"选项
   4 - 实现UnassignAlias命令，允许用户从MQTT服务器取消关联变量
   5 - 使用确认对话框以防止误操作
   6 - 集成现有的删除API来实际移除变量与MQTT服务器的关联
   7 - 更新UI以提供用户反馈
   8
   9 此功能允许用户通过右键菜单轻松取消MQTT服务器与变量的关联。

DMS.WPF/Services/MqttAliasDataService.cs

@@ -133,21 +133,23 @@ public class MqttAliasDataService : IMqttAliasDataService
     public async Task<bool> DeleteMqttAlias(MqttAliasItem mqttAlias)
     {
         // 从数据库和内存中删除MQTT别名
-        var result = await _mqttAliasManagementService.UpdateAsync(new MqttAlias 
-        { 
-            Id = mqttAlias.Id, 
-            VariableId = mqttAlias.VariableId, 
-            MqttServerId = mqttAlias.MqttServerId,
-            Alias = null // Setting alias to null effectively removes the alias
-        });
+        var result = await _mqttAliasManagementService.DeleteAsync(mqttAlias.Id);
 
-        if (result > 0)
+        if (result )
         {
-            // 从界面删除MQTT别名
-            _dataStorageService.MqttAliases.Remove(mqttAlias.Id);
+            
+            if (_dataStorageService.MqttServers.TryGetValue(mqttAlias.MqttServerId, out var mqttServerItem))
+            {
+                mqttServerItem.VariableAliases.Remove(mqttAlias);
+            }
+            if (_dataStorageService.Variables.TryGetValue(mqttAlias.VariableId, out var variableItem))
+            {
+                variableItem.MqttAliases.Remove(mqttAlias);
+            }
+            _dataStorageService.MqttAliases.Remove(mqttAlias.Id, out _);
         }
 
-        return result > 0;
+        return result;
     }
     
     /// <summary>

DMS.WPF/ViewModels/MqttServerDetailViewModel.cs

@@ -24,6 +24,7 @@ namespace DMS.WPF.ViewModels
         private readonly INotificationService _notificationService;
         private readonly IEventService _eventService;
         private readonly IMqttManagementService _mqttManagementService;
+        private readonly IMqttAliasDataService _mqttAliasDataService;
         private readonly IWPFDataService _wpfDataService;
         private readonly IDataStorageService _dataStorageService;
         private readonly INavigationService _navigationService;
@@ -58,6 +59,7 @@ namespace DMS.WPF.ViewModels
                                          INotificationService notificationService,
                                          IEventService eventService,
                                          IMqttManagementService mqttManagementService,
+                                         IMqttAliasDataService mqttAliasDataService,
                                          IWPFDataService wpfDataService,
                                          IDataStorageService dataStorageService,
                                          INavigationService navigationService)
@@ -67,6 +69,7 @@ namespace DMS.WPF.ViewModels
             _notificationService = notificationService;
             this._eventService = eventService;
             _mqttManagementService = mqttManagementService;
+            this._mqttAliasDataService = mqttAliasDataService;
             this._wpfDataService = wpfDataService;
             this._dataStorageService = dataStorageService;
             _navigationService = navigationService;
@@ -259,6 +262,59 @@ namespace DMS.WPF.ViewModels
                 _notificationService.ShowError($"修改发送名称时发生错误：{e.Message}");
             }
         }
+
+        /// <summary>
+        /// 取消关联变量
+        /// </summary>
+        [RelayCommand]
+        private async Task UnassignAlias()
+        {
+            if (SelectedMqttAliaes.Count == 0)
+            {
+                _notificationService.ShowError("请选择要取消关联的变量项。");
+                return;
+            }
+
+            try
+            {
+               var mqttAliasItems= SelectedMqttAliaes.Cast<MqttAliasItem>().ToList();
+                // 拼接要删除的变量名称，用于确认提示
+                var names = string.Join("、", mqttAliasItems.Select(v => v.Alias));
+
+                // 显示确认删除对话框
+                ConfirmDialogViewModel confirmDialogViewModel
+                    = new ConfirmDialogViewModel("取消关联", $"确认要取消关联变量：{names}与MQTT服务器的关联吗,取消后不可恢复，确认要取消吗？", "取消关联");
+                var isDel = await _dialogService.ShowDialogAsync(confirmDialogViewModel);
+
+                if (!isDel)
+                    return; // 如果用户取消删除，则返回
+
+                int successCount = 0;
+
+                foreach (var mqttAliasItem in mqttAliasItems)
+                {
+                    var deleteResult = await _mqttAliasDataService.DeleteMqttAlias(mqttAliasItem);
+                    if (deleteResult)
+                    {
+                        successCount++;
+                    }
+                }
+
+                if (successCount > 0)
+                {
+                    _notificationService.ShowSuccess($"成功取消关联：{successCount}个变量");
+                }
+                else
+                {
+                    _notificationService.ShowError("取消关联失败。");
+                }
+            }
+            catch (Exception e)
+            {
+                _logger.LogError(e, "取消关联变量时发生错误");
+                _notificationService.ShowError($"取消关联时发生错误：{e.Message}");
+            }
+        }
         
         public override Task OnNavigatedFromAsync(NavigationParameter parameter)
         {

DMS.WPF/Views/MqttServerDetailView.xaml

@@ -439,6 +439,9 @@
                                         Command="{Binding ModifyAliasCommand}"
                                         CommandParameter="{Binding RelativeSource={RelativeSource AncestorType=DataGrid}, Path=SelectedItems[0]}"
                                         Header="修改发送名称" />
+                                    <MenuItem
+                                        Command="{Binding UnassignAliasCommand}"
+                                        Header="取消关联" />
                                 </ContextMenu>
                             </DataGrid.ContextMenu>
                             <DataGrid.Columns>