求：C#动态邦定TreeView的代码

求：C#动态邦定TreeView的代码 --------------------编程问答--------------------   private void ShowForm()
        {
            treeView1.Nodes.Clear();
            System.Windows.Forms.TreeNode mNode = new TreeNode("全部");
            //mNode.ImageIndex =1;
            treeView1.Nodes.Add(mNode); 
            //假设DataSet 已经取得
            System.Windows.Forms.TreeNode nNode = new TreeNode("在职");
            treeView1.Nodes.Add(nNode);
            System.Windows.Forms.TreeNode pNode = new TreeNode("离职");
            treeView1 = new System.Windows.Forms.TreeView();
            treeView1.TopNode.Nodes.Add(nNode);
            treeView1.TopNode.Nodes.Add(pNode);
            treeView1.Select();
 SqlConnection con=  new SqlConnection("Server=.;database=JCOA_Data;uid=sa;pwd=sasa");
 string sql = "select iPersonId,vcName,vcNickname from JCOA_Con_OrgPersons";
 SqlDataAdapter com = new SqlDataAdapter(sql, con);
 DataSet ds = new DataSet();
 com.Fill(ds, "0");
            if (ds.Tables[0].Rows.Count <= 0)
            {
                return;
            }
            else
            {
                // add Add some childtreenodes
                foreach (DataRow dr in ds.Tables[0].Rows)
                {
                    System.Windows.Forms.TreeNode aNode = new TreeNode(dr["vcName"].ToString());
                    System.Windows.Forms.TreeNode bNode = new TreeNode(dr["vcName"].ToString());
                    treeView1.Nodes[0].Nodes[0].Nodes.Add(aNode);
                    treeView1.Nodes[0].Nodes[1].Nodes.Add(bNode);
                }
            }
        }

补充：.NET技术 ,  C#