【Vegas原创】更加快速的方法：HashTable遍历TreeView

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

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

{

DBAccess db = new DBAccess();

protected void Page_Load(object sender, EventArgs e)

{

if (!Page.IsPostBack)

{

hashTable();

}

}

public DataTable GetTreeTable()

{

DataTable dt = db.GetDataTable("select * from trvAdmin order by id");

return dt;

}

void hashTable()

{

DataTable dtregion = GetTreeTable();

Hashtable httree = new Hashtable();

foreach (DataRow myrow in dtregion.Rows)

{

TreeNode newnode = new TreeNode();

newnode.Value = myrow["ID"].ToString();

newnode.Text = myrow["TableName"].ToString();

newnode.Target = myrow["Target"].ToString();

newnode.NavigateUrl = myrow["url"].ToString();

newnode.ImageToolTip = myrow["ParentID"].ToString();

newnode.Expanded = bool.Parse(myrow["expanded"].ToString());

httree.Add(newnode.Value, newnode);

}

foreach (DataRow treerow in dtregion.Rows)

{

TreeNode newnode = (TreeNode)httree[treerow["ID"].ToString()];

TreeNode parentnode = (TreeNode)httree[newnode.ImageToolTip];

if (parentnode != null)

{

parentnode.ChildNodes.Add(newnode);

}

else

{

this.TreeView1.Nodes.Add(newnode);

}

}

}

}

数据库：

USE [Vegas]

GO

/****** 对象: Table [dbo].[trvadmin] 脚本日期: 04/17/2008 16:26:46 ******/

SET ANSI_NULLS ON

GO

SET QUOTED_IDENTIFIER ON

GO

CREATE TABLE [dbo].[trvadmin](

[id] [int] NULL,

[parentID] [int] NULL,

[tableName] [nvarchar](50) COLLATE Chinese_PRC_CI_AS NULL,

[url] [nvarchar](max) COLLATE Chinese_PRC_CI_AS NULL,

[target] [nvarchar](50) COLLATE Chinese_PRC_CI_AS NULL,

[expanded] [nvarchar](50) COLLATE Chinese_PRC_CI_AS NULL

) ON [PRIMARY]