使用tree实现无限级树形菜单

//使用tree实现无限级树形菜单

1. //使用tree实现无限级树形菜单（单张表）
2. SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["字符串"].ConnectionString);
3.         string cmdText = "SELECT * FROM CkType WHERE Flag='1'";//sql语句
4.         DataSet ds = new DataSet();
5.         protected void Page_Load(object sender, EventArgs e)
6.         {
7.             if (!Page.IsPostBack)
8.             {
9.                 con.Open();
10.                 SqlCommand myCommand = new SqlCommand(cmdText, con);
11.                 SqlDataAdapter dd = new SqlDataAdapter(myCommand);
12.                 dd.Fill(ds);
13.                 AddTree(-1, (TreeNode)null);//-1根据你根节点的父节点而定
14.             }
15.         }
16.         public void AddTree(int ParentID, TreeNode pNode)
17.         {
18.             DataView dvTree = new DataView(ds.Tables[0]);
19.             //过滤ParentID,得到当前的所有子节点   
20.             dvTree.RowFilter = "[Tpid]   =" + ParentID;
21.             foreach (DataRowView Row in dvTree)
22.             {
23.                 TreeNode Node = new TreeNode();
24.                 if (pNode == null)
25.                 {         //添加根节点   
26.                     Node.Text = Row["TypeName"].ToString();//名字
27.                     Node.Target = "mainFrame";
28.                     Node.NavigateUrl = "knowledge/kdshow.aspx?TID=" + Row["Tid"].ToString();
29.                     TreeView1.Nodes.Add(Node);//添加节点
30.                     Node.Expanded = true;//是否展开
31.                     AddTree(Int32.Parse(Row["Tid"].ToString()), Node); //再次递归   
32.                 }
33.                 else
34.                 {   //添加当前节点的子节点   
35.                     Node.Text = Row["TypeName"].ToString();
36.                     Node.Target = "mainFrame";
37.                     Node.ImageUrl = "~/SystemAdmin/knowledge/Images/folder_go.png";
38.                     Node.NavigateUrl = "knowledge/kdshow.aspx?TID=" + Row["Tid"].ToString();
39.                     pNode.ChildNodes.Add(Node);
40.                     Node.Expanded = false;
41.                     AddTree(Int32.Parse(Row["Tid"].ToString()), Node);           //再次递归   
42.                 }
43.             }
44.         }
45.  }