WPF listbox複製到剪貼板

Question

我想複製一個標準的WPF列表框選擇項目（顯示）文本到CTRL + C上的剪貼板。有沒有簡單的方法來實現這一點。如果這是適用於所有列表框的東西int他的應用程序..這將是偉大的。

在此先感謝。

Answer 1

正如你在WPF是如此，你可以嘗試附加的行爲
首先，你需要這樣一類：

public static class ListBoxBehaviour 
{ 
    public static readonly DependencyProperty AutoCopyProperty = DependencyProperty.RegisterAttached("AutoCopy", 
     typeof(bool), typeof(ListBoxBehaviour), new UIPropertyMetadata(AutoCopyChanged)); 

    public static bool GetAutoCopy(DependencyObject obj_) 
    { 
     return (bool) obj_.GetValue(AutoCopyProperty); 
    } 

    public static void SetAutoCopy(DependencyObject obj_, bool value_) 
    { 
     obj_.SetValue(AutoCopyProperty, value_); 
    } 

    private static void AutoCopyChanged(DependencyObject obj_, DependencyPropertyChangedEventArgs e_) 
    { 
     var listBox = obj_ as ListBox; 
     if (listBox != null) 
     { 
      if ((bool)e_.NewValue) 
      { 
       ExecutedRoutedEventHandler handler = 
        (sender_, arg_) => 
        { 
         if (listBox.SelectedItem != null) 
         { 
          //Copy what ever your want here 
          Clipboard.SetDataObject(listBox.SelectedItem.ToString()); 
         } 
        }; 

       var command = new RoutedCommand("Copy", typeof (ListBox)); 
       command.InputGestures.Add(new KeyGesture(Key.C, ModifierKeys.Control, "Copy")); 
       listBox.CommandBindings.Add(new CommandBinding(command, handler)); 
      } 
     } 
    } 
} 

然後，你必須在XAML這樣

<ListBox sample:ListBoxBehaviour.AutoCopy="True"> 
    <ListBox.Items> 
    <ListBoxItem Content="a"/> 
    <ListBoxItem Content="b"/> 
    </ListBox.Items> 
</ListBox> 

更新：對於最簡單的情況，您可以通過以下方式訪問文本：

private static string GetListBoxItemText(ListBox listBox_, object item_) 
{ 
    var listBoxItem = listBox_.ItemContainerGenerator.ContainerFromItem(item_) 
        as ListBoxItem; 
    if (listBoxItem != null) 
    { 
    var textBlock = FindChild<TextBlock>(listBoxItem); 
    if (textBlock != null) 
    { 
     return textBlock.Text; 
    } 
    } 
    return null; 
} 

GetListBoxItemText(myListbox, myListbox.SelectedItem) 
FindChild<T> is a function to find a child of type T of a DependencyObject 

但就像ListBoxItem可以綁定到對象一樣，ItemTemplate也可以不同，所以你不能依賴它在真實的項目中。