完成保存修改后的变量,和离开视图时提示有变量没有保存

Data/Repositories/VarDataRepository.cs

@@ -87,6 +87,26 @@ public class VarDataRepository
         }
     }
     
+    /// <summary>
+    /// 更新VariableData
+    /// </summary>
+    /// <param name="variableData">VariableData实体</param>
+    /// <returns></returns>
+    public async Task<int> UpdateAsync(List<VariableData> variableDatas)
+    {
+        Stopwatch stopwatch = new Stopwatch();
+        stopwatch.Start();
+        using (var _db = DbContext.GetInstance())
+        {
+            var dbVarDatas = variableDatas.Select(vd=>vd.CopyTo<DbVariableData>());
+            var result = await _db.Updateable(dbVarDatas.ToList()).ExecuteCommandAsync();
+           
+            stopwatch.Stop();
+            Logger.Info($"更新VariableData  {variableDatas.Count()}个 耗时：{stopwatch.ElapsedMilliseconds}ms");
+            return result;
+        }
+    }
+
     /// <summary>
     /// 根据ID删除VariableData
     /// </summary>

Models/VariableData.cs

@@ -22,7 +22,8 @@ public partial class VariableData : ObservableObject
     /// <summary>
     /// 数据转换规则或表达式。
     /// </summary>
-    public string Converstion { get; set; } = String.Empty;
+    [ObservableProperty]
+    private string converstion  = String.Empty;
 
     /// <summary>
     /// 数据类型，例如Int、Float、String等。
@@ -32,12 +33,14 @@ public partial class VariableData : ObservableObject
     /// <summary>
     /// 变量当前原始数据值。
     /// </summary>
-    public string DataValue { get; set; } = String.Empty;
+    [ObservableProperty]
+    private string dataValue  = String.Empty;
 
     /// <summary>
     /// 变量描述。
     /// </summary>
-    public string Description { get; set; } = String.Empty;
+    [ObservableProperty]
+    private string description = String.Empty;
 
     /// <summary>
     /// 变量唯一标识符。
@@ -47,7 +50,8 @@ public partial class VariableData : ObservableObject
     /// <summary>
     /// 变量经过转换或格式化后的显示值。
     /// </summary>
-    public string DisplayValue { get; set; } = String.Empty;
+    [ObservableProperty]
+    private string displayValue  = String.Empty;
 
     /// <summary>
     /// 指示是否需要对变量进行报警监测。
@@ -83,7 +87,8 @@ public partial class VariableData : ObservableObject
     /// <summary>
     /// 变量名称。
     /// </summary>
-    public string Name { get; set; }
+    [ObservableProperty]
+    private string name;
 
     /// <summary>
     /// 节点ID，用于标识变量在设备或系统中的唯一路径。
@@ -108,7 +113,8 @@ public partial class VariableData : ObservableObject
     /// <summary>
     /// 变量数据最后更新时间。
     /// </summary>
-    public DateTime UpdateTime { get; set; } = DateTime.Now;
+   [ObservableProperty]
+    private DateTime updateTime  = DateTime.Now;
 
     /// <summary>
     /// 最后更新变量数据的用户。

Services/NavgatorServices.cs

@@ -13,7 +13,8 @@ public partial class NavgatorServices : ObservableRecipient, IRecipient<Navgator
 {
     private readonly ILogger<NavgatorServices> _logger;
 
-    [ObservableProperty] private ViewModelBase currentViewModel;
+    // [ObservableProperty]
+    private ViewModelBase currentViewModel;
 
     public NavgatorServices(ILogger<NavgatorServices> logger)
     {
@@ -21,35 +22,44 @@ public partial class NavgatorServices : ObservableRecipient, IRecipient<Navgator
         IsActive = true;
     }
 
-    partial void OnCurrentViewModelChanging(ViewModelBase viewModel)
+    // partial void OnCurrentViewModelChanging(ViewModelBase viewModel)
-    {
-        viewModel?.OnLoading();
-    }
-
-    partial void OnCurrentViewModelChanged(ViewModelBase viewModel)
-    {
-        OnViewModelChanged?.Invoke();
-        viewModel?.OnLoaded();
-    }
-
-    // public ViewModelBase CurrentViewModel
     // {
-    //     get => currentViewModel;
+    //     viewModel?.OnLoading();
-    //     set
+    // }
+    //
+    // partial void OnCurrentViewModelChanged(ViewModelBase viewModel)
     // {
-    //         value?.OnLoading();
-    //         currentViewModel = value;
     //     OnViewModelChanged?.Invoke();
-    //         currentViewModel?.OnLoaded();
+    //     viewModel?.OnLoaded();
-    //     }
     // }
 
+    public ViewModelBase CurrentViewModel
+    {
+        get => currentViewModel;
+        set { currentViewModel = value; }
+    }
 
-    public void Receive(NavgatorMessage message)
+
+    public async void Receive(NavgatorMessage message)
     {
         try
         {
+            ViewModelBase nextViewModel = message.Value;
+            //如果OnExit返回False终止跳转
+
+            if (currentViewModel != null)
+            {
+                var isExit = await currentViewModel.OnExitAsync();
+                if (!isExit)
+                {
+                    return;
+                }
+            }
+
+            nextViewModel?.OnLoading();
             CurrentViewModel = message.Value;
+            OnViewModelChanged?.Invoke();
+            currentViewModel?.OnLoaded();
         }
         catch (Exception e)
         {

ViewModels/VariableTableViewModel.cs

@@ -63,6 +63,52 @@ partial class VariableTableViewModel : ViewModelBase
 
         IsLoadCompletion = true;
     }
+    /// <summary>
+    /// 退出当前实体时调用
+    /// </summary>
+    /// <returns></returns>
+    public override async Task<bool> OnExitAsync()
+    {
+        var modifiedDatas = DataVariables.Where(d => d.IsModified == true)
+                                         .ToList();
+        if (modifiedDatas.Count == 0)
+            return true;
+        var isExit = await _dialogService.ShowConfrimeDialog(
+            "数据未保存", $"你有{modifiedDatas.Count}个修改的变量没有保存，离开后这些数据就可能丢失了确认要离开吗？", "离开");
+        if (!isExit)
+        {
+            // 不保存数据，还原原来的数据
+            foreach (var modifiedData in modifiedDatas)
+            {
+                var oldData  = _originalDataVariables.First(od=>od.Id ==modifiedData.Id);
+                oldData.CopyTo( modifiedData);
+                modifiedData.IsModified = false;
+            }
+
+            return false;
+
+        }
+
+        return true;
+    }
+
+    /// <summary>
+    /// 保存修改过的变量数据
+    /// </summary>
+    [RelayCommand]
+    private async void SaveModifiedVarData()
+    {
+        var modifiedDatas = DataVariables.Where(d => d.IsModified == true)
+                                         .ToList();
+        ///更新数据库
+        await _varDataRepository.UpdateAsync(modifiedDatas);
+        // 还原修改状态
+        foreach (var modifiedData in modifiedDatas)
+        {
+            modifiedData.IsModified = false;
+        }
+        NotificationHelper.ShowMessage($"修改的{modifiedDatas.Count}变量保存成功.", NotificationType.Success);
+    }
 
     [RelayCommand]
     public async void EditVarData(VariableTable variableTable)
@@ -74,7 +120,6 @@ partial class VariableTableViewModel : ViewModelBase
             // // 如果用户取消或对话框未返回设备，则直接返回
             if (varData == null)
                 return;
-
             varData.VariableTableId = variableTable.Id;
             // 更新数据库
             await _varDataRepository.UpdateAsync(varData);
@@ -106,12 +151,14 @@ partial class VariableTableViewModel : ViewModelBase
                 return;
 
             varData.VariableTableId = variableTable.Id;
-            var addVarData = await _varDataRepository.AddAsync(varData);
+            // 更新数据库
-            DataVariables?.Add(addVarData);
+            await _varDataRepository.UpdateAsync(varData);
-            variableTable.DataVariables?.Add(addVarData);
+            // 更新当前页面的
-            var msg = addVarData.Id > 0 ? $"添加变量成功:{varData?.Name}" : $"添加变量成功:{varData.Name}";
+            var index = variableTable.DataVariables.IndexOf(SelectedVariableData);
-            var type = addVarData.Id > 0 ? NotificationType.Success : NotificationType.Error;
+            // 更新变量表中的
-            NotificationHelper.ShowMessage(msg, type);
+            if (index >= 0 && index < variableTable.DataVariables.Count)
+                variableTable.DataVariables[index] = varData;
+            NotificationHelper.ShowMessage($"添加变量成功:{varData?.Name}", NotificationType.Success);
         }
         catch (Exception e)
         {

ViewModels/ViewModelBase.cs

@@ -14,6 +14,11 @@ public abstract class ViewModelBase : ObservableObject
         
     }
     
+    public virtual async Task<bool> OnExitAsync()
+    {
+        return true;
+    }
+
 
 
 }

Views/Dialogs/ConfirmDialog.xaml

@@ -20,10 +20,11 @@
 
     </ui:ContentDialog.Resources>
 
-    <Grid Width="480"
+    <Grid Width="360"
           Margin="10">
         <TextBlock Margin="20"
-                   FontSize="18"
+                   FontSize="14"
+                   TextWrapping="Wrap"
                    FontWeight="Bold"
                    Text="{Binding Message}">
         </TextBlock>

Views/VariableTableView.xaml

@@ -61,6 +61,7 @@
                         <ui:FontIcon Icon="{x:Static ui:SegoeFluentIcons.Add}" />
                     </ui:AppBarButton.Icon>
                 </ui:AppBarButton>
+                
                 <ui:AppBarButton Command="{Binding EditVarDataCommand}"
                                  CommandParameter="{Binding VariableTable}"
                                  Label="编辑变量">
@@ -68,6 +69,13 @@
                         <ui:FontIcon Icon="{x:Static ui:SegoeFluentIcons.Edit}" />
                     </ui:AppBarButton.Icon>
 
+                </ui:AppBarButton>
+                <ui:AppBarButton  Command="{Binding SaveModifiedVarDataCommand}"
+                                 Label="保存变量">
+                    <ui:AppBarButton.Icon>
+                        <ui:FontIcon  Icon="{x:Static ui:SegoeFluentIcons.Save}" />
+                    </ui:AppBarButton.Icon>
+
                 </ui:AppBarButton>
                 <ui:AppBarButton x:Name="ShareButton"
                                  Label="Share">