TreeView控件

public partial class WebForm1 : System.Web.UI.Page

{

        DataSet dsTreeView = new DataSet();



        protected void Page_Load(object sender, EventArgs e)

        {

            if (!IsPostBack)

            {

                GetTreeView();

                InitTree("", null);

                TreeView1.ExpandDepth = 0;//展开目录

                TreeView1.Nodes[0].Expanded = true;//默认只展开第2层目录

            }

        }



        private void InitTree(string parent_code, TreeNode parent_node)

        {

            DataView dv = dsTreeView.Tables[0].DefaultView;

            dv.RowFilter = "[parent_code] = '" + parent_code + "'";



            foreach (DataRowView Row in dv)

            {

                TreeNode node = new TreeNode();

                node.SelectAction = TreeNodeSelectAction.Expand;

                if (parent_node == null)//根节点

                {

                    node.Text = Row["area_name"].ToString();

                    node.Value = Row["area_code"].ToString();

                    this.TreeView1.Nodes.Add(node);

                    InitTree(Row["area_code"].ToString(), node);//递归

                }

                else

                {

                    node.Text = "<div onclick=\"javascript:SetView('" + Row["area_name"].ToString() + "')\">" + Row["area_name"].ToString() + "</div>";//绑定前台JS事件

                    node.Value = Row["area_code"].ToString();

                    parent_node.ChildNodes.Add(node);

                    InitTree(Row["area_code"].ToString(), node);//递归

                }

            }

        }



        /// <summary>

        /// 数据源

        /// </summary>

        private void GetTreeView()

        {

            SqlConnection sqlConn = new SqlConnection("server=.;database=test;uid=test;pwd=test");

            SqlDataAdapter adp = new SqlDataAdapter("select area_code,area_name,parent_code from tbl_all_AreaList where area_code<>parent_code", sqlConn);

            adp.Fill(dsTreeView);

        }



    }