实现了导航功能

ViewModels/DataTransformViewModel.cs

@@ -0,0 +1,6 @@
+namespace PMSWPF.ViewModels;
+
+public class DataTransformViewModel:ViewModelBase
+{
+    
+}

ViewModels/DevicesViewModel.cs

@@ -0,0 +1,6 @@
+namespace PMSWPF.ViewModels;
+
+public class DevicesViewModel:ViewModelBase
+{
+    
+}

ViewModels/HomeViewModel.cs

@@ -0,0 +1,6 @@
+namespace PMSWPF.ViewModels;
+
+public class HomeViewModel:ViewModelBase
+{
+    
+}

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:";

ViewModels/PlcListViewModel.cs

@@ -1,17 +0,0 @@
-using CommunityToolkit.Mvvm.ComponentModel;
-using PMSWPF.Data.Entities;
-using System.Collections.ObjectModel;
-
-namespace PMSWPF.ViewModels
-{
-    public partial class PlcListViewModel : ObservableRecipient
-    {
-        [ObservableProperty]
-        private ObservableCollection<PLC> plcList;
-        public PlcListViewModel()
-        {
-            plcList = new ObservableCollection<PLC>();
-        
-        }
-    }
-}

ViewModels/ViewModelBase.cs

@@ -0,0 +1,6 @@
+namespace PMSWPF.ViewModels;
+
+public class ViewModelBase
+{
+    
+}