asp.net+Ajax校验用户是否存在的实现代码

  需求:做一个ajax登录

  主要技术点:jquery ajax以及blur事件

  当用户名输入框失去焦点的时候就会触发blur事件,然后进行ajax请求,获得结果(true或者false),如果请求结果为true,就把用户名输入框图片替换成ok,并且输出文字:恭喜您, 这个帐号可以注册,否则就替换成图片no,并且输出文字:账号已存在

  源代码:

  前台:

  

复制代码 代码如下:

  <%@ Page Language="C#" MasterPageFile="~/Top_Down.master" AutoEventWireup="true" CodeFile="RegisterMember.aspx.cs"Inherits="Member_RegisterMember" Title="注册用户" %>

  <asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">

  <link href="../Admin/css/template.css" rel="stylesheet" type="text/css" />

  <link href="../Admin/css/validationEngine.jquery.css" rel="stylesheet" type="text/css" />

  <script src="../Admin/scripts/jquery-1.7.1.min.js" type="text/javascript"></script>

  <script src="../js/jquery.validationEngine.js" type="text/javascript"></script>

  <script src="../Admin/scripts/isValid.js" type="text/javascript"></script>

  <script src="../js/languages/jquery.validationEngine-zh_CN.js" type="text/javascript"></script>

  <script type="text/javascript">

  var IsCheck=false;

  $(function(){

  // binds form submission and fields to the validation engine

  $("#form1").validationEngine();

  //当鼠标失去焦点的时候验证

  $("#txtUserName").blur(function(){

  $.ajax({

  url:"Data/GetMemberInfo.ashx?method=CheckExistUserName",

  data:{"username":$("#txtUserName").val()},

  type:"post",

  success:function(text){

  $("#tdUser").empty();//清空内容

  var item;

  if(text=="True"){

  item='<img src="../images/ok.png"/>恭喜您,这个帐号可以注册!';

  IsCheck=true;

  }

  else

  item='<img src="../images/no.png"/>对不起,这个帐号已经有人注册了!';

  $("#tdUser").append(item);

  }

  });

  });

  });

  function CheckForm1()

  {

  if(IsCheck)

  {

  form1.submit();

  }

  else{

  alert("请验证用户名");

  }

  }

  </script>

  </asp:Content>

  <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">

  <form id="form1" action="Data/GetMemberInfo.ashx?method=SaveMemberInfo" method="post">

  <div class="content">

  <div class="left_side">

  <div class="logo_bottom"></div>

  </div>

  <div class="right_side zhuce">

  <div class="zhuce_title"><p class="hide">注册新用户</p></div>

  <div class="zhuce_p">

  <table width="578" class="zc_table1">

  <tr>

  <td width="93" class="zc_tar">用户名:</td>

  <td width="200" class="zc_tal"><input type="text" class="zc_input1 validate[required,custom[LoginName]] text-input"name="txtUserName" id="txtUserName"/><!--LoginName-->

  </td>

  <td width="269" class="zc_font" id="tdUser"></td>

  </tr>

  <tr>

  <td class="zc_tar">密码:</td>

  <td class="zc_tal"><input type="password" class="zc_input2 validate[required,custom[LoginPwd]] text-input" id="txtPwd"name="txtPwd"/></td>

  <td class="zc_font"></td>

  </tr>

  <tr>

  <td class="zc_tar">确认密码:</td>

  <td class="zc_tal"><input type="password" class="zc_input3 validate[required,equals[txtPwd] text-input" /></td>

  <td class="zc_font"></td>

  </tr>

  <tr>

  <td class="zc_tar">E-mail:</td>

  <td class="zc_tal"><input type="text" class="zc_input4 validate[required,custom[email] text-input" name="txtEmail"id="txtEmail"/></td>

  <td class="zc_font"></td>

  </tr>

  <tr>

  <td class="zc_tar">验证码:</td>

  <td class="zc_tal" colspan="2"><input type="text" class="zc_input5" name="txtCheckCode" id="txtCheckCode"/><imgsrc="../Admin/FileManage/VerifyChars.ashx" alt="验证码" /></td>

  </tr>

  <tr><td> </td></tr>

  <tr>

  <td colspan="3" align="center"><a href="javascript:CheckForm1()"><img src="../images/zhuce_sumbit.png" /></a></td>

  </tr>

  </table>

  </div>

  </div>

  </div>

  </form>

  </asp:Content>

  后台事件:

  

复制代码 代码如下:

  <%@ WebHandler Language="C#" Class="GetMemberInfo" %>

  using System;

  using System.Web;

  using Common;

  using czcraft.Model;

  using czcraft.BLL;

  using System.Web.SessionState;

  public class GetMemberInfo : IHttpHandler,IRequiresSessionState

  {

  // //记录日志

  private static readonly log4net.ILog logger =log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

  public void ProcessRequest(HttpContext context)

  {

  String methodName = context.Request["method"];

  if (!string.IsNullOrEmpty(methodName))

  CallMethod(methodName, context);

  }

  /// <summary>

  /// 根据业务需求调用不同的方法

  /// </summary>

  /// <param name="Method">方法</param>

  /// <param name="context">上下文</param>

  public void CallMethod(string Method, HttpContext context)

  {

  switch (Method)

  {

  case "CheckExistUserName":

  CheckExistUserName(context);

  break;

  //case "SearchMember":

  // SearchMember(context);

  // break;

  case "SaveMemberInfo":

  SaveMemberInfo(context);

  break;

  //case "RemoveMember":

  // RemoveMember(context);

  // break;

  //case "GetMember":

  // GetMember(context);

  // break;

  default:

  return;

  }

  }

  /// <summary>

  /// 验证帐号是否存在

  /// </summary>

  /// <param name="context"></param>

  public void CheckExistUserName(HttpContext context)

  {

  string username = context.Request["username"];

  if (Tools.IsValidInput(ref username, true))

  {

  context.Response.Write(new memberBLL().CheckExistUserName(username));

  }

  }

  /// <summary>

  /// 保存用户信息

  /// </summary>

  /// <param name="context"></param>

  public void SaveMemberInfo(HttpContext context)

  {

  try

  {

  //表单读取

  string txtUserName = context.Request["txtUserName"];

  string txtPwd = context.Request["txtPwd"];

  string txtEmail = context.Request["txtEmail"];

  string txtCheckCode = context.Request["txtCheckCode"];

  //验证码校验

  if (!txtCheckCode.Equals(context.Session["checkcode"].ToString()))

  {

  return;

  }

  //字符串sql注入检测

  if (Tools.IsValidInput(ref txtUserName, true) && Tools.IsValidInput(ref txtPwd, true) && Tools.IsValidInput(ref txtEmail, true))

  {

  member info = new member();

  info.username = txtUserName;

  info.password = txtPwd;

  info.Email = txtEmail;

  info.states = "0";

  if (new memberBLL().AddNew(info) > 0)

  {

  SMTP smtp = new SMTP(info.Email);

  string webpath = context.Request.Url.Scheme + "://" + context.Request.Url.Authority + "/Default.aspx";

  smtp.Activation(webpath, info.username);//发送激活邮件

  JScript.AlertAndRedirect("注册用户成功!!", "../Default.aspx");

  }

  else {

  JScript.AlertAndRedirect("注册用户失败!", "../Default.aspx");

  }

  }

  }

  catch (Exception ex)

  {

  logger.Error("错误!", ex);

  }

  }

  public bool IsReusable {

  get {

  return false;

  }

  }

  }