封装一个TreeView

//封装一个TreeView封装一个TreeView
//本封装TreeView 适合 01 0101 010101无限递归
//引用控件时 this.TreeView1.DataSet=(DataSet),该DataSet必须包含 Code，Name，Url字段

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

//程序设计:陈文利 
//QQ:36055915 MSN：sinofishing@hotmail.com

namespace EastSoft.Web.Control
...{
       public class ETreeView:System.Web.UI.WebControls.TreeView
       ...{
           public ETreeView()
           ...{
           
           }       
           protected override void OnSelectedNodeChanged(EventArgs e)
           ...{
               string s = "";
               s = this.SelectedNode.Text.Remove(0, this.SelectedNode.Text.IndexOf("]", 0) + 1);
               m_SelectText = s;
               base.OnSelectedNodeChanged(e);
           }
           private string m_SelectText="";
           public string SelectText ...{ get ...{ return m_SelectText; } set ...{ m_SelectText = value; } }
      
           private DataSet ds;
           public DataSet DataSet ...{ get ...{return ds;}set ...{     ds = value;     RootNode((TreeNode)null); } }
           private int len = 2;
           public void RootNode(TreeNode pNode)
           ...{
               this.Nodes.Clear();
               if (ds == null)
                   return;
               DataView dvTree = new DataView(ds.Tables[0]);
               dvTree.RowFilter = "len(Code)=" + len.ToString();
               foreach (DataRowView Row in dvTree)
               ...{
                   TreeNode Node = new TreeNode();
                   Node.Value = Row["Code"].ToString();
                   Node.Text ="[" + Row["Code"].ToString() + "]"+     Row["Name"].ToString();
                   Node.NavigateUrl = Row["Url"].ToString();
                   this.Nodes.Add(Node);
                   AddNode(Node, len);
               }           

           }
           public void AddNode(TreeNode pNode, int len)
           ...{           
               len = len + 2;
               DataView dvTree = new DataView(ds.Tables[0]);
               dvTree.RowFilter = "len(Code)=" + len.ToString() + "and Code like '" + pNode.Value + "%'";
               foreach (DataRowView Row in dvTree)
               ...{
                   TreeNode Node = new TreeNode();
                   Node.Value = Row["Code"].ToString();
                   Node.Text = "[" + Row["Code"].ToString() + "]" + Row["Name"].ToString();
                   Node.NavigateUrl = Row["Url"].ToString();
                   pNode.ChildNodes.Add(Node);
                   AddNode(Node, len);
               }
           }
           private DataSet m_CheckedNodeDataSet = new DataSet();
           public DataSet CheckedNodeDataSet
           ...{
               get
               ...{
                   return m_CheckedNodeDataSet;
               }
               set
               ...{
                   m_CheckedNodeDataSet = value;
                   CheckedBoot();
               }
            
           }
           private void CheckedBoot()
           ...{
               foreach (DataRow dr in m_CheckedNodeDataSet.Tables[0].Rows)
               ...{

                   foreach (TreeNode chileTNT in this.Nodes)
                   ...{
                       if (chileTNT.Value == dr[0].ToString())
                       ...{
                           chileTNT.Checked = true;

                       }
                       SelectChileNotes(chileTNT.ChildNodes, dr[0].ToString());
                   }
               }
           }
           private void SelectChileNotes(TreeNodeCollection TNC, string select)
           ...{
               if (TNC.Count == 0) return;
               foreach (TreeNode chileTNT in TNC)
               ...{
                   if (chileTNT.Value == select)
                   ...{
                       chileTNT.Checked = true;
                       return;
                   }
                   SelectChileNotes(chileTNT.ChildNodes, select);
               }
           }
       }
}