如何屏蔽控件的默认行为(例如TreeView对MouseDoubleClick的响应）？

Question

         

如题，想对TreeView的MouseDoubleClick事件进行自定义的操作，比如双击后展开所有子级TreeViewItem，想到的方法是自定义一个TreeView，继承TreeView并重写OnMouseDoubleClick过程：如下

Public Class MyTreeView
    Inherits TreeView

    Protected Overrides Sub OnMouseDoubleClick(e As MouseButtonEventArgs)
        'MyBase.OnMouseDoubleClick(e)
         MsgBox("bingo")
    End Sub

End Class

原本以为注释掉MyBase.OnMouseDoubleClick(e)后就不会引发TreeView双击后的默认行为（展开当前TreeViewItem），但是发现无论注释 与否这个默认行为一直存在，求解？
     BTW：WPF应用程序。

   

Answer 1

    自己顶一下，求达人解答。

Answer 2

楼主 你好，可以这样操作，

XAML:

<TreeView DockPanel.Dock="Left" TreeViewItem.PreviewMouseDoubleClick="TreeViewItem_PreviewMouseDoubleClick">
    <TreeViewItem Header="Node Level 1" IsExpanded="True" >
        <TreeViewItem Header="Node Level 2.1" >
            <TreeViewItem Header="MyItem" />
        </TreeViewItem>
        <TreeViewItem Header="Node Level 2.2">
            <TreeViewItem Header="MyItem" />
        </TreeViewItem>
    </TreeViewItem>
</TreeView>

C# Code:

private void TreeViewItem_PreviewMouseDoubleClick(object sender, MouseButtonEventArgs e)
{
    //this will suppress the event that is causing the nodes to expand/contract 
    e.Handled = true;
}

更多信息，请参考：http://stackoverflow.com/questions/6037883/how-to-disable-double-click-behaviour-in-a-wpf-treeview

希望能够帮到你！

谢谢！

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Answer 3

     不好意思，前两天有事现在才回复，先谢谢了，等我仔细实验下，有问题再来请教，再次感谢。