asp.net随机验证码（使用ashx）

ValidateCode.ashx

<%@ WebHandler Language="C#" Class="ValidateCode" %>
using System;
using System.Data;
using System.Web;
using System.Collections;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Drawing;

    public class ValidateCode : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            context.Response.Cache.SetCacheability(HttpCacheability.NoCache);//特别注意，如不加，单击验证图片＇看不清换一张＇，无效果．
            this.CreateCheckCodeImage(GenerateCheckCode(context),context);
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
        private string GenerateCheckCode(HttpContext context)
        {
            int number;
            char code;
            string checkCode = String.Empty;

            System.Random random = new Random();

            for (int i = 0; i < 6; i++)
            {
                number = random.Next();

补充：asp.net教程,.Net开发

上一个：asp.net利用RAR实现文件压缩解压缩
下一个：ASP.NET学习笔记(ASP.NET页面生命周期)