重构项目，将项目拆分（临时提交）

DMS.WPF/Services/NavgatorServices.cs

@@ -0,0 +1,68 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Messaging;
+using DMS.Helper;
+using DMS.Message;
+using DMS.ViewModels;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging;
+using DMS.Core.Enums;
+
+namespace DMS.Services;
+
+public partial class NavgatorServices : ObservableRecipient, IRecipient<NavgatorMessage>
+{
+    // [ObservableProperty]
+    private ViewModelBase currentViewModel;
+
+    public NavgatorServices()
+    {
+        IsActive = true;
+    }
+
+    // partial void OnCurrentViewModelChanging(ViewModelBase viewModel)
+    // {
+    //     viewModel?.OnLoading();
+    // }
+    //
+    // partial void OnCurrentViewModelChanged(ViewModelBase viewModel)
+    // {
+    //     OnViewModelChanged?.Invoke();
+    //     viewModel?.OnLoaded();
+    // }
+
+    public ViewModelBase CurrentViewModel
+    {
+        get => currentViewModel;
+        set { currentViewModel = value; }
+    }
+
+
+    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)
+        {
+            NotificationHelper.ShowError($"切换视图时发生了错误：{e.Message}", e);
+        }
+    }
+
+    public event Action OnViewModelChanged;
+}