如果前往的页面与当前页面相同，则不添加新的页面到页面栈中

src/Downkyi.UI/ViewModels/Video/VideoDetailViewModel.cs

@@ -11,7 +11,7 @@ public partial class VideoDetailViewModel : ViewModelBase
     public const string Key = "VideoDetail";
 
     // 保存输入字符串，避免被用户修改
-    private string? input = null;
+    private string? _input = null;
 
     #region 页面属性申明
 
@@ -85,6 +85,12 @@ public partial class VideoDetailViewModel : ViewModelBase
     {
         base.OnNavigatedTo(parameter);
 
+        if (parameter!.ContainsKey("value"))
+        {
+            _input = (string)parameter["value"];
+            InputText = _input;
+        }
+       
     }
 
 }

src/Downkyi/ViewModels/MainWindowViewModel.cs

@@ -125,10 +125,15 @@ public partial class MainWindowViewModel : ViewModelBase
         var viewModel = SetContent(viewKey);
         if (viewModel == null) { return; }
 
+        // 如果前往的页面与当前页面相同，
+        // 则不添加新的页面到页面栈中
+        if (viewModel != Content)
+        {
+            _pages.Push(viewKey);
+        }
+
         viewModel.OnNavigatedTo(parameter);
         Content = viewModel;
-
-        _pages.Push(viewKey);
     }
 
     public void Backward(Dictionary<string, object>? parameter = null)