TreeView(一次性遞歸所有節點)

 TreeView(一次性遞歸所有節點)

數據庫Table
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int key                  int                   nvarchar(100)         nvarchar(100)      nvarchar(100)           nvarchar(100)
NODE_ID        PARENT_ID        NODE_NAME            ADDRESS        IMAGE_URL        SELECT_IMAGE_URL
1                    0                         node_1                     http://*              *.gif                      *.gif
2                    1                         node_1_1                  http://*              *.gif                     *.gif
3                    2                         node_1_1_1              http://*               *.gif                     *.gif
4                    0                         node_2                     http://*               *.gif                     *.gif
5                    4                         node_2_1                  http://*              *.gif                      *.gif
6                    5                         node_2_1_1              http://*               *.gif                     *.gif
7                    0                         node_3                     http://*               *gif                      *.gif
8                    7                         node_3_1                  http://*              *.gif                      *.gif

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代碼程序：

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using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using Components;
using Microsoft.Web.UI.WebControls;

namespace Register
{
 /// <summary>
 /// WebForm1 的摘要說明。
 /// </summary>
 public class WebForm1 : System.Web.UI.Page
 {
  protected Microsoft.Web.UI.WebControls.TreeView tvList;
  private SqlControl objSqlControl;
  private DataTable objDataTable;
 
  private void Page_Load(object sender, System.EventArgs e)
  {
   // 在此處放置用戶代碼以初始化頁面
   if ( ! Page.IsPostBack )
   {
    objSqlControl = new SqlControl();
    TreeNode node = new TreeNode();
    objDataTable = objSqlControl.SelectData();  //取得所有數據得到DataTable
    this.CreateTree( tvList.Nodes,"0" ); //建立節點
   }
  }

  private void CreateTree( TreeNodeCollection node,string parent_id )
  {
   DataView dvList = new DataView( this.objDataTable );
   dvList.RowFilter = "PARENT_ID='" + parent_id + "'";  //過濾父節點
   TreeNode nodeTemp;
   foreach ( DataRowView dv in dvList )
   {
    nodeTemp = new TreeNode();
    nodeTemp.ID = dv["NODE_ID"].ToString();  //節點ID
    nodeTemp.Text = dv["NODE_NAME"].ToString();  //節點名稱
    nodeTemp.NavigateUrl = dv["ADDRESS"].ToString();  //節點鏈接地址
    nodeTemp.ImageUrl = dv["IMAGE"].ToString();  //節點圖片(未展開)
    nodeTemp.SelectedImageUrl = dv["IMAGE_EX"].ToString();  //節點圖片(展開)
    nodeTemp.Target = "_parent";  //節點鏈接Target
    
    node.Add( nodeTemp );  //加入節點
    this.CreateTree( nodeTemp.Nodes,nodeTemp.ID );  //遞歸
   }
  }  

Trackback: http://tb.blog.csdn.net/TrackBack.aspx?PostId=1288602

****************************************************************************************************

  protected Microsoft.Web.UI.WebControls.TreeView TreeView1;
  DataSet ds=new DataSet();  //定義一個DataSet
  ConnSql connsql=new ConnSql();

 
  private void Page_Load(object sender, System.EventArgs e)
  {
   // 在此處放置用戶代碼以初始化頁面
   test();
  }

  #region Web 窗體設計器生成的代碼
  override protected void OnInit(EventArgs e)
  {
   //
   // CODEGEN: 該調用是 ASP.NET Web 窗體設計器所必需的。
   //
   InitializeComponent();
   base.OnInit(e);
  }
  
  /// <summary>
  /// 設計器支持所需的方法 - 不要使用代碼編輯器修改
  /// 此方法的內容。
  /// </summary>
  private void InitializeComponent()
  {   
   this.Load += new System.EventHandler(this.Page_Load);

  }
  #endregion
  public void test()
  {
  // string sql="select * from Members";
   string sql="select *,l.Level_Name from members m inner join member_Level l on m.Level_ID=l.Level_ID";

   ds=connsql.ExecutesqlDS(sql);
   

   //調用遞歸函數，完成樹形結構的生成
   AddTree(0, (TreeNode)null);

  }
  public void AddTree(int ParentID,TreeNode pNode)
  {
   TreeNode tn1=new TreeNode();
   DataView dvTree = new DataView(ds.Tables[0]);

   //過濾ParentID,得到當前的所有子節點
   dvTree.RowFilter =  "[User_ParentID] = " + ParentID;
  // dvTree.RowFilter =  "[User_ParentID] = " + ParentID;

   foreach(DataRowView Row in dvTree)
   {
    if(pNode == null)
    {    //添加根節點
    
     tn1.Text=Row["User_Account"].ToString()+'/'+Row["User_Name"].ToString()+'/'+Row["Level_Name"].ToString();
     TreeView1.Nodes.Add(tn1);
     tn1.Expanded=true;
     AddTree(Int32.Parse(Row["User_ID"].ToString()),tn1);    //再次遞歸
    }
    else
    {   //添加當前節點的子節點
     TreeNode tn2=new TreeNode();

     tn2.Text=Row["User_Account"].ToString()+'/'+Row["User_Name"].ToString()+'/'+Row["Level_Name"].ToString();
     pNode.Nodes.Add(tn2);
     tn1.Expanded=true;
     AddTree(Int32.Parse(Row["User_ID"].ToString()),tn2);    //再次遞歸
    }
   }
  }