[ASP.net]TreeView(1)(一次性递归所有节点)

数据库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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代码程序：

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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 的摘要说明。

 /// </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)

  {

   // 在此处放置用户代码以初始化页面

   if ( ! Page.IsPostBack )

   {

    objSqlControl = new SqlControl();

    TreeNode node = new TreeNode();

    objDataTable = objSqlControl.SelectData();  //取得所有数据得到DataTable

    this.CreateTree( tvList.Nodes,"0" ); //建立节点

   }

  }

  private void CreateTree( TreeNodeCollection node,string parent_id )

  {

   DataView dvList = new DataView( this.objDataTable );

   dvList.RowFilter = "PARENT_ID='" + parent_id + "'";  //过滤父节点

   TreeNode nodeTemp;

   foreach ( DataRowView dv in dvList )

   {

    nodeTemp = new TreeNode();

    nodeTemp.ID = dv["NODE_ID"].ToString();  //节点ID

    nodeTemp.Text = dv["NODE_NAME"].ToString();  //节点名称

    nodeTemp.NavigateUrl = dv["ADDRESS"].ToString();  //节点链接地址

    nodeTemp.ImageUrl = dv["IMAGE"].ToString();  //节点图片(未展开)

    nodeTemp.SelectedImageUrl = dv["IMAGE_EX"].ToString();  //节点图片(展开)

    nodeTemp.Target = "_parent";  //节点链接Target

    

    node.Add( nodeTemp );  //加入节点

    this.CreateTree( nodeTemp.Nodes,nodeTemp.ID );  //递归

   }

  }

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