this.TreeView1.DataSource = tv;
this.TreeView1.DataBind();
(tv是 TreeView tv = new TreeView();然后再里面加了节点）这样绑定有错误HierarchicalDataBoundControl only accepts data sources that implement IHierarchicalDataSource or IHierarchicalEnumerable.，谁解释下，谢谢！
------解决方案--------------------------------------------------------
this.TreeView1.DataSource是TreeView ？用一个TreeView绑定另外一个？TreeView 又不是数据源，这样不行啊