Treeview DoubleClick问题 [英] Treeview DoubleClick Problem

问题描述

你好，

我在双击树视图时遇到问题.我想避免双击树视图的+/-时双击树视图.请任何人告诉我，如何避免这种情况?

Hello,

I have a problem on Double click of tree view. I want to avoid double click of tree view when double click on +/- of tree view. please anyone tell me, How to avoid this?


thanks in advance.

推荐答案

您无法避免双击:用户单击所需的次数. :-)

—SA

You cannot avoid double click: the user clicks as many time as she/he wants. :-)

—SA

您不能双击树节点的+/-.单击即可展开和折叠节点.我试图抑制双击，但正如SAKryukov所说，不可能做到这一点.这是因为事件BeforeExpand在事件MouseDoubleClick之前得到处理，否则我们可以通过在BeforeExpand 事件中设置e.Cancel = true来取消节点的扩展.
这是我尝试过的方法:

You cannot doubleclick on the +/- of the treenodes. The nodes expand and collapse on a single click. I tried suppressing the doubleclick but as SAKryukov says, its not possible to do that. Its because the event BeforeExpand gets handled before the event MouseDoubleClick, otherwise we could have cancelled the expansion of nodes by setting the e.Cancel = true in the BeforeExpand event.
Here is how I tried:

private bool isDoubleClick = false;

void treeView1_MouseDoubleClick(object sender, MouseEventArgs e)
{
 isDoubleClick = true;
}

//But this event is called before MouseDoubleClick so isDoubleClick will be false.
void treeView1_BeforeExpand(object sender, TreeViewCancelEventArgs e)
{
 if (isDoubleClick == true)
  {
   e.Cancel = true;
  }
}

这篇关于Treeview DoubleClick问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！