[原创]动态的给TREEVIEW加载节点

数据表的设置：
CREATE TABLE NODETABLE
(
 Node int NOT NULL IDENTITY (1, 1),
 ParentNode int NOT NULL,
 NodeDesc nvarchar(50) NOT NULL
)

把NODETABLE数据加载到DataTable

public void getTreeView(int parentnode,TreeNodeCollection node)
  {
    DataTable  dt = new DataTable();
　//此行插入把加载的DataTable数据赋给dt;
    dv = dt.DefaultView;
   dv.RowFilter = "ParentNode = "+parentnode;
   try
   {
    foreach(DataRowView drv in dv)
    {
     TreeNode tNode = node.Add(drv["NodeDesc"].ToString());
     getTreeView((int)drv["Node"],tNode.Nodes,ppo);
    }
   }
   finally
   {
    dt.Dispose();
   }
  }