applycustomvalidator.aspx.cs

来自「asp.net专家200问(含源代码解决法案」· CS 代码 · 共 80 行

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;

namespace ApplyCustomValidator
{
	/// <summary>
	/// WebForm1 的摘要说明。
	/// </summary>
	public class WebForm1 : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label lblOutput;
		protected System.Web.UI.WebControls.TextBox Text1;
		protected System.Web.UI.WebControls.Button ValidatorBtn;
		protected System.Web.UI.WebControls.CustomValidator CustomValidator1;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
		}

		#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.CustomValidator1.ServerValidate += new System.Web.UI.WebControls.ServerValidateEventHandler(this.CustomValidator1_ServerValidate);
			this.ValidatorBtn.Click += new System.EventHandler(this.ValidatorBtn_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void CustomValidator1_ServerValidate(object source, System.Web.UI.WebControls.ServerValidateEventArgs args)
		{
			try 
			{
				int num = Int32.Parse(args.Value);
				if (num%2 == 0) 
				{
					args.IsValid = true;
					return;
				} 
			}
			catch (Exception) {}
			args.IsValid = false;
		}

		private void ValidatorBtn_Click(object sender, System.EventArgs e)
		{
			if (Page.IsValid)
			{
				lblOutput.Text = "页有效！";
            }
            else 
			{
				lblOutput.Text = "页无效！";
            }
		}
	}
}