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.Data.OleDb;
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 Telerik.WebControls;

namespace Telerik.MenuExamplesCSharp.Menu.Examples.Design.DataBinding
{
	/// <summary>
	/// Summary description for DefaultCS.
	/// </summary>
	public class DefaultCS : Telerik.QuickStart.XhtmlPage
	{
        protected System.Web.UI.WebControls.RadioButtonList RadioButtonList1;
        protected RadMenu Menu1;
        protected System.Web.UI.WebControls.Label Label1;
        protected string DefaultDSN = String.Empty;

        private DataSet GetMenuDataSource(string inputDSN)
        {
            OleDbConnection OldDbCon = new OleDbConnection(inputDSN);
            OldDbCon.Open();
            OleDbDataAdapter MenuDataAdaptor = new OleDbDataAdapter("SELECT Text,idtext,parentIdtext FROM Links", OldDbCon);
            DataSet MenuDataLoader = new DataSet();
            MenuDataAdaptor.Fill(MenuDataLoader);
            OldDbCon.Close();
            return MenuDataLoader; 
        }

        // The old DataBind method uses the GenerateMenu, which sets 
        // the data Source, and then cycles trough the dataset calling 
        // RecursivelyPopulate which sets recursively the control trees

        private void GenerateMenu(string inputDSN)
        {
            OleDbConnection OldDbCon = new OleDbConnection (inputDSN); 
            OldDbCon.Open();
            OleDbDataAdapter adapter = new OleDbDataAdapter("SELECT id,parentId,Text,idtext,parentIdtext FROM Links WHERE status=1", OldDbCon); 
            DataSet ds = new DataSet();
            adapter.Fill(ds);
            ds.Relations.Add("NodeRelation", ds.Tables[0].Columns["id"], ds.Tables[0].Columns["parentId"],false);
            MenuGroup MainGroup = new MenuGroup();
            MainGroup.Flow = PresentationDirection.Horizontal;
            Menu1.RootGroup = MainGroup;
            Menu1.ImagesBaseDir = "~/Menu/Examples/Programming/DataBinding/Images/";
            foreach(DataRow dbRow in ds.Tables[0].Rows)
            {
                if(dbRow.IsNull("parentId"))
                {
                    Telerik.WebControls.MenuItem item = new Telerik.WebControls.MenuItem();					
                    item.Text = dbRow["Text"].ToString();
                    MainGroup.AddItem(item);					
                    RecursivelyPopulate(dbRow, item);
                }
            }
            OldDbCon.Close();
        }

        private void RecursivelyPopulate(DataRow dbRow, Telerik.WebControls.MenuItem item)
        {
            MenuGroup CurrentGroup = new MenuGroup();
            foreach (DataRow childRow in dbRow.GetChildRows("NodeRelation"))
            {
                Telerik.WebControls.MenuItem childItem = new Telerik.WebControls.MenuItem();				
                childItem.Text = childRow["Text"].ToString();				
                CurrentGroup.AddItem(childItem);
                RecursivelyPopulate(childRow, childItem);
            }
            if (CurrentGroup.Items.Count > 0)
            {
                item.RightLogo = "arrow_right.gif";
                item.ChildGroup = CurrentGroup;
            }
        }
        private void processMainItems()
        {

            if (Menu1.RootGroup != null && Menu1.RootGroup.Items.Count > 0)
            {
                for (int i=0;i<Menu1.RootGroup.Items.Count;i++)
                {
                    Menu1.RootGroup.Items[i].CssClass = "MainItem";
                    Menu1.RootGroup.Items[i].CssClassOver = "MainItemOver";
                }
            }
        }

        private void MenuRealBind()
        {
            // here we set the Data source string (DSN) required by ADO.NET classes
            DefaultDSN = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("menudata.mdb");
            switch(Convert.ToInt32(RadioButtonList1.Items[RadioButtonList1.SelectedIndex].Value)) 
            {
                case 1:
                    // here we use the new Asp.NET DataBinding mechanism
                    Menu1.EnableGroupChildrenImage = true;
                    Menu1.DataFieldID = "idtext";//idtext
                    Menu1.DataFieldParentID = "parentIdtext";//parentIdtext
                    Menu1.DataSource = GetMenuDataSource(DefaultDSN).Tables[0].DefaultView;
                    Menu1.DataBind();

                    Menu1.RootGroup.Flow = PresentationDirection.Horizontal;
                    Label1.Text = "Menu is data-bound using Asp.NET DataBind() method";
                    break;
                case 2:
                    GenerateMenu(DefaultDSN);
                    Label1.Text = "Menu is data-bound using RecursivelyPopulate() method";
                    break;
                default:
                    GenerateMenu(DefaultDSN);
                    Label1.Text = "Menu is data-bound using RecursivelyPopulate() method";
                    break;
            }
        }

        private void RadioSwitch_Clicked(object sender, System.EventArgs e)
        {
            MenuRealBind();
            processMainItems();
        }

        private void Evnt_Test(object sender, MenuEntityInstantiatedEventArgs e)
        {
            if (e.Item != null)
            {
                //e.Item.Text = "test_change";
            }
            if (e.DataItem != null)
            {

            }
        }

		private void Page_Load(object sender, System.EventArgs e)
		{
            if (!Page.IsPostBack)
            {
                MenuRealBind();
                processMainItems();
            }
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
            this.Menu1.ItemDataBound += new Telerik.WebControls.RadMenu.RadMenuItemInstantiatedEventHandler(this.Evnt_Test);
            this.RadioButtonList1.SelectedIndexChanged += new System.EventHandler(this.RadioSwitch_Clicked);
			this.Load += new System.EventHandler(this.Page_Load);
		}
		#endregion
	}
}