实现了导航功能

ViewModels/MainViewModel.cs

@@ -3,15 +3,30 @@ using CommunityToolkit.Mvvm.Messaging;
 using PMSWPF.Data.Entities;
 using PMSWPF.Message;
 using System.Collections.ObjectModel;
+using PMSWPF.Services;
 
 namespace PMSWPF.ViewModels
 {
     partial class MainViewModel : ObservableRecipient, IRecipient<MyMessage>
     {
-       
-        public MainViewModel()
-        { 
+        private readonly NavgatorServices _navgatorServices;
+
+        [ObservableProperty]
+       private ViewModelBase currentViewModel;
+        public MainViewModel(NavgatorServices navgatorServices)
+        {
+            _navgatorServices = navgatorServices;
+            _navgatorServices.OnViewModelChanged += () =>
+            {
+                CurrentViewModel = _navgatorServices.CurrentViewModel;
+            };
             IsActive = true;
+            CurrentViewModel = new HomeViewModel();
+        }
+
+        public void NavgateTo<T>() where T : ViewModelBase
+        {
+            _navgatorServices.NavigateTo<T>();
         }
 
         string text = "Hello Count:";