TreeView的selectionchange事件在设置选择为空的时候不触发

Question

如果选中的节点发生变化，会触发AfterSelect事件

但是如果用代码设置选择节点为空

treeView1.SelectedNode = null;

就不会触发

有什么事件可以捕捉到这个变化吗

Answer 1

AfterSelected是你改变了选择的节点之后才触发的事件，你把原先选中的节点赋值为null，并不意味你重新换了一个新选定的节点，因此不会触发该事件。

如果你希望点击空白处把选中节点置空，那么可以考虑：
1）弄一个ContextMenu（右键菜单）。
2）绑定到TreeView上，Click事件就是设置null的代码。

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Answer 2

看看这个帖子：http://stackoverflow.com/questions/1781458/what-event-can-i-use-when-setting-treeview-selectednode-null

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