刪除listobox所有項目

你好我試圖刪除列表中的所有元素：這是我的簡單列表框：刪除listobox所有項目

<ListBox Margin="0,0,-12,0" ItemsSource="{Binding Items}" Name="listbox" > 
       <ListBox.ItemTemplate> 
        <DataTemplate> 
         <StackPanel Orientation="Horizontal" Margin="0,0,0,17" > 


          <!--Replace rectangle with image--> 
          <Image Source="{Binding Img}" /> 
          <StackPanel Width="311"> 
           <TextBlock Text="{Binding Pos}" 
          </StackPanel> 
         </StackPanel> 
        </DataTemplate> 
       </ListBox.ItemTemplate> 
</ListBox>

但是，當我試圖刪除列表框中的所有元素的錯誤是：

A first chance exception of type 'System.InvalidOperationException' occurred in  System.Windows.dll 
System.InvalidOperationException: Operation not supported on read-only collection. 
    at System.Windows.Controls.ItemCollection.ClearImpl() 
    at System.Windows.PresentationFrameworkCollection`1.Clear() 
    at aaaaa.MainPage.Button_Click(Object sender, RoutedEventArgs e) 
    at System.Windows.Controls.Primitives.ButtonBase.OnClick() 
    at System.Windows.Controls.Button.OnClick() 
    at  System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e) 
    at System.Windows.Controls.Control.OnMouseLeftButtonUp(Control ctrl, EventArgs e) 
    at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, String eventName) 

private void Button_Click(object sender, RoutedEventArgs e) 
    { 
     try 
     { 
      listbox.Items.Clear(); 
     } 
     catch (Exception ss) { 
      Debug.WriteLine(ss.ToString()); 
     } 
    }

謝謝！

來源

2011-06-11 trickui

如果將其指定爲Binding，則無法清除Items集合。您應該清除綁定收集。不要忘記，你的源集合應實現INotifyCollectionChanged

來源

2011-06-11 09:45:25 Snowbear

感謝您的回答你的綁定！有沒有任何教程？ – trickui 2011-06-11 11:36:51

@trckui，我不能推薦任何。只是一種體驗。 *失敗更好*。 – Snowbear 2011-06-11 21:26:02

你應該這樣做使用的ObservableCollection

// this should be level member instance or something like that just to keep a reference to it. 
ObservableCollection<YourClass> itemsSource = new ObservableCollection<YourClass>(); 
// ... Fill you items collection 
listBox.ItemsSource = itemsSource; 

// if you need to clear your list, just use this code 
itemsSouce.Clear();

來源

2011-06-11 19:01:16 Waleed

刪除listobox所有項目

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