请问如何触发treeview的展开事件，在c#中怎么写，

Question

1.AutoPostBack设置为true;
2.选择treeview属性上面的事件图形按钮；
3.按住Ctrl，双击Expand后面的空白处；

Answer 1

Expand=true;
private void TreeView1_SelectedIndexChange(object sender, Microsoft.Web.UI.WebControls.TreeViewSelectEventArgs e)
{ if(this.TreeView1.SelectedNodeIndex!="0")
{
WhichTreeNodeID = System.Convert.ToInt32(this.TreeView1.GetNodeFromIndex(this.TreeView1.SelectedNodeIndex).ID);  
WhichTreeNodeText =   this.TreeView1.GetNodeFromIndex(this.TreeView1.SelectedNodeIndex).Text;
this.BindXmlFileData(WhichTreeNodeID); 
}
else
{

this.BindData();
}
}