comboboxtest.aspx.cs

ASP中web自定义控件的使用源码及说明文档

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 Bestcomy.Web.UI.WebControls;

namespace WebControlTest
{
	/// <summary>
	/// 
	/// </summary>
	public class ComboBoxTest : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.DropDownList drop;
		protected System.Web.UI.WebControls.Button Button1;
		protected Bestcomy.Web.UI.WebControls.ComboBox ComboBox1;
		protected Bestcomy.Web.UI.WebControls.ComboBox ComboBox2;
		protected System.Web.UI.WebControls.Label note;
		protected Bestcomy.Web.UI.WebControls.ComboBox ComboBox3;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			if(!IsPostBack)
			{
				for(int i=1; i < 10; i++)
				{
					ComboItem item = new ComboItem("选择项"+i.ToString(),"Valule"+i.ToString());
					ComboBox1.Items.Add(item);
				}
				ComboBox1.Text = "Test";
//				ComboBox1.ReadOnly = true;

				DataTable dt = new DataTable();
				dt.Columns.Add("text", typeof(string));
				dt.Columns.Add("value", typeof(string));
				for(int i=1; i < 10; i++)
				{
					DataRow ndr = dt.NewRow();
					ndr["text"] = "Item" + i.ToString();
					ndr["value"] = "Value_" + i.ToString();
					dt.Rows.Add(ndr);
				}

				ComboBox3.DataSource = dt.DefaultView;
				ComboBox3.DataTextField = "text";
				ComboBox3.DataValueField = "value";
				ComboBox3.DataBind();
//				ComboBox3.Enabled = false;

				HtmlForm form = (HtmlForm)this.FindControl("ComboBoxTest");
				foreach(Control control in form.Controls)
				{
					if(control is ComboBox)
						drop.Items.Add(control.ID);
				}
			}
		}

		#region Web Form Designer generated code
		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.Button1.Click += new System.EventHandler(this.Button1_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void Button1_Click(object sender, System.EventArgs e)
		{	
			ComboBox1.Clear();			
			ComboBox cBox = (ComboBox)this.FindControl(drop.SelectedItem.Text);
		//	note.Text = string.Format("{0}'s selected value is <b>{1}</b> and text is <b>{2}</b>",cBox.ID,cBox.SelectedItem.Value,cBox.Text);
			note.Text = string.Format("{0}'s selectedIndex is {1} and text is {2}",cBox.ID,cBox.SelectedIndex,cBox.Text);
		}
	}
}