1         Endv.DataHelper myHelper = new Endv.DataHelper();
 2             DataSet ds = myHelper.GetDataSet("select * from Right");
 3 
 4             DataTable dt = ds.Tables[0];
 5 
 6             //1
 7             DataRow[] drParent = dt.Select(“PID = ‘0‘");
 8 
 9             foreach
 
 (DataRow dr in drParent)
10             {
11                 TreeNode Node = tree1.Nodes.Add(dr["Name"].ToString());
12                 Node.Tag = dr["ID"].ToString();
13                 //2
14                 DataRow[] drChild = dt.Select("F_PID = ‘" + dr["ID"].ToString() + "‘");
15                 foreach
 
 (DataRow dr1 in drChild)
16                 {
17                     TreeNode cNode = Node.Nodes.Add(dr1["Name"].ToString());
18                     cNode.Tag = dr1["ID"].ToString();
19                 }
20             }
21 
22             ds.Dispose();

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