defaultcs.aspx.cs

Telerik是很大的第三方软件制造商

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 System.Xml;
using Telerik.QuickStart;
using Telerik.WebControls;

namespace Telerik.TreeViewExamplesCSharp.LoadOnDemandXml
{
	/// <summary>
	/// Summary description for _Default.
	/// </summary>
	public class DefaultCS: XhtmlPage
	{
		protected Telerik.WebControls.RadTreeView RadTree1;
		
		private void Page_Load(object sender, System.EventArgs e)
		{
			if (!Page.IsPostBack)
			{				
				XmlDocument xmlDoc = new XmlDocument();
				xmlDoc.Load(Server.MapPath("~/TreeView/Data/LargeTree.xml"));
				Cache["XmlDocument"] = xmlDoc;

				foreach (XmlNode node in xmlDoc.SelectNodes("/Tree/Node"))
				{
					RadTreeNode treeNode = new RadTreeNode( node.Attributes["Text"].Value);
					treeNode.ExpandMode = ExpandMode.ServerSide;
					RadTree1.Nodes.Add(treeNode);
				}
			}
		}

		private void RadTree1_NodeExpand(object o, Telerik.WebControls.RadTreeNodeEventArgs e)
		{
			string nodeText = e.NodeClicked.Text;
			XmlDocument xmlDoc = (XmlDocument) Cache["XmlDocument"];
			
			e.NodeClicked.Nodes.Clear();
			XmlNode expandedNode = xmlDoc.SelectSingleNode("//Node[@Text='" + nodeText + "']");
			foreach (XmlNode node in expandedNode.ChildNodes)
			{
				RadTreeNode treeNode = new RadTreeNode(node.Attributes["Text"].Value);
				if (node.ChildNodes.Count > 0)
				{
					treeNode.ExpandMode = ExpandMode.ServerSide;
				}

				e.NodeClicked.Nodes.Add(treeNode);
			}

			e.NodeClicked.Expanded = true;
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			InitializeComponent();
			base.OnInit(e);
		}
		
		///		Required method for Designer support - do not modify
		///		the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.RadTree1.NodeExpand += new Telerik.WebControls.RadTreeView.RadTreeViewEventHandler(this.RadTree1_NodeExpand);
			this.Load += new System.EventHandler(this.Page_Load);
		}
		#endregion

	}
}