WPF列表框复制到剪贴板 [英] WPF listbox copy to clipboard

问题描述

我试图复制一个标准的WPF列表框中选择的项目（显示）文本到剪贴板上的Ctrl + C。有没有简单的方法来实现这一目标。如果是的东西，所有的列表框作品诠释，他的应用程式..这将是巨大的。

I am trying to copy a standard WPF listbox selected Item (displayed) text to clipboard on CTRL+C. Is there any simple way to achieve this. If it is something that works for all the listboxes int he app.. that would be great.

先谢谢了。

推荐答案

正如你在WPF是如此，你可以尝试附加的行为

首先，你需要一个像这样的类：

As you're in WPF so you could try the attached behaviours
First you need a class like this:

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));
            }
        }
    }
}

< BR>
然后你的XAML这样

Then you have the XAML like this

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

更新：对于简单的情况下，您可以访问文本以下方式：

Updates: For the simplest case, you can access the text in the below way:

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中才能绑定对象，ItemTemplate中可能是不同的，所以你不能在实际项目依赖于它。

But just like the ListBoxItem could be bound to object, the ItemTemplate could be different as well, so you can't rely on it in real projects.

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