ASP.NET - TreeView控件，只操作最后一级节点

效果：

使用母板页进行，左右页面进行跳转。

绑定TreeView控件：http://www.cnblogs.com/KTblog/p/4792302.html

主要功能：

• 点击节点的时候，只操作最后一级的节点，其他节点跳过不执行代码。

代码：

 using System;
 using System.Collections.Generic;
 using System.Data;
 using System.Data.SqlClient;
 using System.Web.UI.WebControls;

 namespace APManage
 {
     public partial class TreeView : System.Web.UI.Page
     {
         public string ConnString = @"server = HUANGFU-PC; database = DB_APManage; integrated security = true";
         public DataTable dt = null;
         public List<int> erjinode = new List<int>(); //存储非最后一级的节点

         /// <summary>
         /// 初始化事件
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         protected void Page_Load(object sender, EventArgs e)
         {
             if (!IsPostBack)
             {
                 dt = new DataTable();

                 GetMenuToDataTable("select * from Tb_APCategory", dt);
                 BindTree(dt, null, "");
             }
         }   

         /// <summary>
         /// 选择存储所有的非最后一级节点的ID
         /// </summary>
         public void SelectIsNotMainNode()
         {
             SqlConnection con = new SqlConnection(ConnString);
             con.Open();
             SqlCommand cmd = new SqlCommand("select ID from Tb_APCategory where ParentID = 1000", con);
             SqlDataReader sdr = cmd.ExecuteReader();
             while (sdr.Read())
             {
                 SqlConnection con_2 = new SqlConnection(ConnString);
                 con_2.Open();
                 SqlCommand cmd_2 = new SqlCommand("select ID from Tb_APCategory where ParentID = " + sdr["ID"].ToString() + "", con_2);
                 SqlDataReader sdr_2 = cmd_2.ExecuteReader();
                 while (sdr_2.Read())
                 {
                     erjinode.Add(Convert.ToInt32(sdr_2["ID"].ToString()));
                 }
                 erjinode.Add(Convert.ToInt32(sdr["ID"].ToString()));
             }
         }

         /// <summary>
         /// 鼠标点击节点事件
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         protected void TreeView1_SelectedNodeChanged(object sender, EventArgs e)
         {
             string node = this.TreeView1.SelectedNode.Value;//获得所选择节点的值，也就是表中的ID
             SelectIsNotMainNode();
             foreach (int item in erjinode)
             {
                 if (node == item.ToString())
                 {
                     ClientScript.RegisterStartupScript(this.GetType(), "msg", "<script>alert('不是最后一个节点！')</script>");
                     return;
                 }
             }
             ClientScript.RegisterStartupScript(this.GetType(), "msg", "<script>alert('"+node+"！')</script>");
         }

         #region 绑定TreeView控件

         /// <summary>
         /// 循环绑定TreView
         /// </summary>
         /// <param name="dtSource"></param>
         /// <param name="parentNode"></param>
         /// <param name="parentID"></param>
         private void BindTree(DataTable dtSource, TreeNode parentNode, string parentID)
         {
             DataRow[] rows = dtSource.Select(string.Format("ParentID={0}", parentID));
             foreach (DataRow row in rows)
             {
                 TreeNode node = new TreeNode();
                 node.Text = row["CategoryName"].ToString();
                 node.Value = row["ID"].ToString();
                 BindTree(dtSource, node, row["ID"].ToString());
                 if (parentNode == null)
                 {
                     this.TreeView1.Nodes.Add(node);
                 }
                 else
                 {
                     parentNode.ChildNodes.Add(node);
                 }
             }
         }

         /// <summary>
         /// 绑定DataTable
         /// </summary>
         /// <param name="query"></param>
         /// <param name="dt"></param>
         /// <returns></returns>
         private DataTable GetMenuToDataTable(string query, DataTable dt)
         {
             using (SqlConnection conn = new SqlConnection(ConnString))
             {
                 SqlCommand cmd = new SqlCommand(query, conn);
                 SqlDataAdapter ada = new SqlDataAdapter(cmd);
                 ada.Fill(dt);
             }
             return dt;
         }

         #endregion
     }
 }