急啊！help me !怎么让treeview在页面上显示(treeview + oracle)
这是我的。CS代码：
protected void Page_Load(object sender, EventArgs e)
  {
  TreeView TreeView1 = new TreeView();
  TreeView1.Nodes.Clear();
  OracleConnection myConnection = new OracleConnection(Page_SQL_CONN_Entity);
  myConnection.Open();
  OracleCommand MySelectOrc = new OracleCommand("select action_column_id,action_column_name from sys_action_column order by action_column_id",myConnection);
  OracleDataReader oda = MySelectOrc.ExecuteReader();
  while (oda.Read())
  {
  TreeNode tn1 = new TreeNode();
  tn1.Text = oda[0].ToString();
  //tn1.Target = "NodeEdit";//链接目标
  //tn1.NavigateUrl = "MODULEEdit.asp?MODULEID=" + oda[0].ToString();//链接地址
  OracleCommand MySelectOrc1 = new OracleCommand("select action_column_id,action_column_name from sys_action_column where action_column_name='" + oda[0].ToString() + "' order by action_column_id", myConnection);
  OracleDataReader oda1 = MySelectOrc1.ExecuteReader();
  while(oda1.Read())
  {
  TreeNode tn2=new TreeNode();
  tn2.Text=oda1[1].ToString();
  //tn2.Target = "NodeEdit";
  //tn2.NavigateUrl = "TASKTYPEEdit.asp?TASKTYPEID=" + oda1[0].ToString();
  OracleCommand MySelectOrc2 = new OracleCommand("select id,action_name from action_column_id where action_name='" + oda1[0].ToString() + "' order by action_column_id", myConnection);
  OracleDataReader oda2 = MySelectOrc2.ExecuteReader();
  oda2.Close();
  tn1.ChildNodes.Add(tn2);
  }
  oda1.Close();
  TreeView1.Nodes.Add(tn1);
  }
  oda.Close();
  myConnection.Close();
  }

请各位大虾多多帮忙

------解决方案--------------------
没说清楚
不明白楼主想要解决什么?

------解决方案--------------------
tn1.Text = oda[0].ToString(); 
tn2.Text=oda1[1].ToString(); 
都有值吗?

------解决方案--------------------
另外 tn1.ChildNodes.Add(tn2); 
改成: tn1.Nodes.Add(tn2)试试.
------解决方案--------------------
http://www.lokcore.com/avrilxu/article.asp?id=3
有两篇，看看吧
------解决方案--------------------
顶住啊，路过而已