禁用Windows Phone工具箱中的MenuItem

Question

我想在contextMenu中禁用一些menuItem，但不是全部。

<tk:ContextMenuService.ContextMenu> 
          <tk:ContextMenu Name="optionMenu"> 

           <tk:MenuItem Header="Move to Favorite" Name="moveToFav" Click="moveToFav_Click" /> 
           <tk:MenuItem Header="Copy to Favorite" Name="copyToFav" Click="copyToFav_Click" /> 
           <tk:MenuItem Header="Set as Folder Front" Name="setFront" Click="setFront_Click" /> 
           <tk:MenuItem Header="Delete" Name="delete" Click="delete_Click" /> 
          </tk:ContextMenu> 
         </tk:ContextMenuService.ContextMenu> 

例如，我想禁用moveToFav，copyToFav菜單項，我嘗試

moveToFav.isEnabled = false; copyToFav.isEnable = false; 

但是因爲編譯器說moveToFav不會在當前的背景下存在它沒有工作。

任何幫助？

Answer 1

很好，我決定做以下

<tk:ContextMenuService.ContextMenu> 
          <tk:ContextMenu x:Name="optionMenu" > 

           <tk:MenuItem Header="Move to Favorite" x:Name="moveToFav" Click="moveToFav_Click" Loaded="moveToFav_Loaded" /> 
           <tk:MenuItem Header="Copy to Favorite" Name="copyToFav" Click="copyToFav_Click" Loaded="copyToFav_Loaded" /> 
           <tk:MenuItem Header="Set as Folder Front" Name="setFront" Click="setFront_Click" Loaded="setFront_Loaded" /> 
           <tk:MenuItem Header="Delete" Name="delete" Click="delete_Click" /> 
          </tk:ContextMenu> 
         </tk:ContextMenuService.ContextMenu> 

代碼：

private void moveToFav_Loaded(object sender, RoutedEventArgs e) 
    { 
     if (condition) 
      (sender as MenuItem).IsEnabled = false; 
    } 

    private void copyToFav_Loaded(object sender, RoutedEventArgs e) 
    { 
     if (condition) 
      (sender as MenuItem).IsEnabled = false; 
    } 

它並不完美，但它的作品