defaultcs.aspx.cs

Telerik是很大的第三方软件制造商

using System;
using System.Data;
using System.Data.OleDb;
using System.Web.UI;
using System.IO;
using System.Web.UI.WebControls;
using Telerik.QuickStart;
using Telerik.WebControls;

namespace Telerik.ComboboxExamplesCS.MultiColumnCombo
{
	/// <summary>
	/// Summary description for _Default.
	/// </summary>
	public class DefaultCS: XhtmlPage
	{		
		protected System.Web.UI.WebControls.Button Button1;		
		protected System.Web.UI.WebControls.Label Label1;
		protected System.Web.UI.WebControls.Label Lable1;		
		protected Telerik.WebControls.RadComboBox RadComboBox1;	
		
		private void LoadSupervisors(string filter)
		{
			string mdbPath = Server.MapPath("~/Combobox/Data/NWind.mdb"); 
			OleDbConnection dbCon = new OleDbConnection ("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + mdbPath); 
			dbCon.Open();
			
			string sql = "SELECT * from Customers";
			if (filter != String.Empty)
			{
				sql += " WHERE CompanyName LIKE '" + filter.Replace("'","''") + "%'";
			}
			
			OleDbDataAdapter adapter = new OleDbDataAdapter(sql, dbCon);
			DataTable dt = new DataTable();
			adapter.Fill(dt);
			dbCon.Close();
			
			RadComboBox1.DataSource = dt;
			RadComboBox1.DataBind();
		}

		private void Page_Load(object sender, System.EventArgs e)
		{			
			if (!Page.IsPostBack)
			{
				LoadSupervisors(String.Empty);
			}
		}

		// Fixing the calendar control XHTML output.
		protected override void Render(HtmlTextWriter writer)
		{
			StringWriter stringWriter = new StringWriter();
			HtmlTextWriter newWriter = new HtmlTextWriter(stringWriter);
			base.Render(newWriter);
			string pageHtml = stringWriter.ToString();
			pageHtml = pageHtml.Replace("<td align=\"Center\"", "<td align=\"center\"");
			pageHtml = pageHtml.Replace("<td align=\"Right\"", "<td align=\"right\"");
			pageHtml = pageHtml.Replace("<td align=\"Left\"", "<td align=\"left\"");
			writer.Write(pageHtml);
		}

		#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);
		}
		
		///		Required method for Designer support - do not modify
		///		the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{				
			this.RadComboBox1.ItemsRequested += new Telerik.WebControls.RadComboBoxItemsRequestedEventHandler(this.RadComboBox1_ItemsRequested);
			this.RadComboBox1.ItemDataBound += new Telerik.WebControls.RadComboBoxItemDataBoundEventHandler(this.RadComboBox1_ItemDataBound);
			this.Button1.Click += new System.EventHandler(this.Button1_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void RadComboBox1_ItemsRequested(object o, Telerik.WebControls.RadComboBoxItemsRequestedEventArgs e)
		{		
			LoadSupervisors(e.Text);			
		}

		private void Button1_Click(object sender, System.EventArgs e)
		{
			Label1.Text = "You selected: <b>" + RadComboBox1.Text + "</b>";
		}

		private void RadComboBox1_ItemDataBound(object o, Telerik.WebControls.RadComboBoxItemDataBoundEventArgs e)
		{
			e.Item.Text = ((DataRowView) e.Item.DataItem)["CompanyName"].ToString();
		}

	}
}