验证码接收
using System; using System.Collections.Generic; using System.Linq; using System.Web; using CZBK.ItcastProject.Common; namespace CZBK.ItcastProject.WebApp._2015_5_29 { /// <summary> /// ValidateImageCode 的摘要说明 /// </summary> public class ValidateImageCode : IHttpHandler { public void ProcessRequest(HttpContext context) { context.Response.ContentType = "text/plain"; ValidateCode validatecode = new ValidateCode(); string code= validatecode.CreateValidateCode(4); validatecode.CreateValidateGraphic(code, context); } public bool IsReusable { get { return false; } } } }
登录页面（实现验证码点击替换）
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title></title> <script type="text/javascript"> window.onload = function () { var validateCode = document.getElementById("validateCode"); validateCode.onclick = function () { document.getElementById("imgCode").src = "ValidateImageCode.ashx?d=" + new Date().getMilliseconds(); } } </script> </head> <body> <form method="post" action="UserLogin.ashx"> 用户名:<input type="text" name="txtName" /><br /> 密码:<input type="password" name="txtPwd" /><br /> 验证码:<input type="text" name="txtCode" /><img src="ValidateImageCode.ashx" id="imgCode" /> <a href="javascript:void(0)" id="validateCode">看不清</a><br /> <input type="submit" value="登录" /> </form> </body> </html>