webcombobox.aspx.cs

ASP C#代码实例 适合初学人士学习使用

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 ProgStudios.WebControls;
using System.IO;

namespace Example_12_17
{
	/// <summary>
	/// WebForm1 的摘要说明。
	/// </summary>
	public class WebComboBox : System.Web.UI.Page
	{
		protected ProgStudios.WebControls.ComboBox ComboBox1;
		protected System.Web.UI.WebControls.Label lblValue;
		protected System.Web.UI.WebControls.Label lblSelectedIndex;
		protected System.Web.UI.HtmlControls.HtmlInputCheckBox Checkbox1;
		protected System.Web.UI.HtmlControls.HtmlInputCheckBox Checkbox2;
		protected System.Web.UI.HtmlControls.HtmlGenericControl Msg;

		private DataSet ds;
		protected DataView dataView1;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			ComboBox1.AutoPostBack = Checkbox1.Checked;
			lblValue.Text = ComboBox1.Value;
			lblSelectedIndex.Text = ComboBox1.SelectedIndex.ToString();

			if(!this.IsPostBack) 
			{
				ds = new DataSet();
				FileStream fs = new FileStream(Server.MapPath("newdataset.xml"),FileMode.Open,FileAccess.Read);
				StreamReader reader = new StreamReader(fs);
				ds.ReadXml(reader);
				fs.Close();
				dataView1 = new DataView(ds.Tables[0]);
				ComboBox1.DataBind();
			}
		}

		#region Web 窗体设计器生成的代码
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{    
			this.ComboBox1.ServerChange += new System.EventHandler(this.ComboBox1_ServerChange);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void ComboBox1_ServerChange(object sender, System.EventArgs e)
		{
			Msg.InnerText = "OnServerChange 事件 Fired: ComboBox1 = " + ComboBox1.Value;
		}
	}
}