ajax邮箱、用户名唯一性验证

    <script type="text/javascript">
        $(function () { 
            $("#txtEmail").blur(function () {
                $.ajax({
                    type: "post",
                    url: "reg.ashx?email=" + $.trim($("#txtEmail").val()) + "&d=" + (+new Date()),
                    success: function (data) {
                        var vCount = parseInt(data);
                        if (vCount == 0) {
                            alert("邮箱可以使用");
                        }
                        else {
                            alert("邮箱已经被占用");
                        }
                    }
                });
            });

            $("#checkpwd").blur(function () {
                return CheckPwd();
            });
        });

        function CheckPwd()
        {
            var bCheck = true;
            if ($.trim($("#pwd").val()) != $.trim($("#checkpwd").val()))
            {
                alert("两次密码输入不一致");
                bCheck = false;
            }
            return bCheck;
        }

    </script>

reg.ashx代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace WebT1.Ti.html2
{
    /// <summary>
    /// reg 的摘要说明
    /// </summary>
    public class reg : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            if (context.Request["email"] != null)
            {
                string strEmail = context.Request["email"];
                List<UserModel> lstUser = DataService.GetUserList();
                var v = lstUser.Where(p => p.Email == strEmail);
                int iCount = 0;
                if (v.Count() > 0)
                {
                    iCount = 1;
                }
                context.Response.ContentType = "text/plain";
                context.Response.Write(iCount.ToString());
            }
            
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }

    public class DataService
    {
        /// <summary>
        /// 模拟已注册用户数据
        /// </summary>
        public static List<UserModel> GetUserList()
        {
            var list = new List<UserModel>();
            list.Add(new UserModel() { Email = "t1@demo.com" });
            list.Add(new UserModel() { Email = "t2@demo.com" });
            list.Add(new UserModel() { Email = "t3@demo.com" });
            list.Add(new UserModel() { Email = "t4@demo.com" });
            list.Add(new UserModel() { Email = "t5@demo.com" });
            return list;
        }
    }

    public class UserModel
    {
        public string Email { get; set; }
    }
}