摘要：
1 前台代码: 2 <asp:TreeView ID="TreeView1" runat="server" ExpandDepth="0" OnTreeNodeExpanded="TreeView1_TreeNodeExpanded" ShowLines="True"> 3 要害是:OnTreeNodeExpanded="TreeView1_TreeNodeExpanded" 4 5 后台代码: 6 7 protected void TreeView1_TreeN 阅读全文