Detailed explanation of jQuery's implementation of form form submission method based on ajax without refresh

Detailed explanation of jQuery's implementation of form form submission method based on ajax without refresh_jquery

WBOY

Release： 2016-05-16 15:27:00

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The example in this article describes how jQuery implements the form form submission method based on ajax without refreshing. Share it with everyone for your reference, the details are as follows:

First, create a new Login.html page:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
 <title>$.ajax()方法发送请求</title>
 <script type="text/javascript" src="js/jquery-1.4.1.js"></script>
 <style type="text/css">
  body
  {
   font-size: 13px;
  }
  .divFrame
  {
   width: 225px;
   border: solid 1px #666;
  }
  .divFrame .divTitle
  {
   padding: 5px;
   background-color: #eee;
   height: 23px;
  }
  .divFrame .divTitle span
  {
   float: left;
   padding: 2px;
   padding-top: 5px;
  }
  .divFrame .divContent
  {
   padding: 8px;
   text-align: center;
  }
  .divFrame .divContent .clsShow
  {
   font-size: 14px;
   line-height: 2.0em;
  }
  .divFrame .divContent .clsShow .clsError
  {
   font-size: 13px;
   border: solid 1px #cc3300;
   padding: 2px;
   display: none;
   margin-bottom: 5px;
   background-color: #ffe0a3;
  }
  .txt
  {
   border: #666 1px solid;
   padding: 2px;
   width: 150px;
   margin-right: 3px;
  }
  .btn
  {
   border: #666 1px solid;
   padding: 2px;
   width: 50px;
  }
 </style>
 <script type="text/javascript">
  $(function () {
   $("#txtName").focus();//输入焦点
   $("#txtName").keydown(function (event) {
    if (event.which == "13") {//回车键,移动光标到密码框
     $("#txtPass").focus();
    }
   });
   $("#txtPass").keydown(function (event) {
    if (event.which == "13") {//回车键，用.ajax提交表单
     $("#btnLogin").trigger("click");
    }
   });
   $("#btnLogin").click(function () { //“登录”按钮单击事件
    //获取用户名称
    var strTxtName = encodeURI($("#txtName").val());
    //获取输入密码
    var strTxtPass = encodeURI($("#txtPass").val());
    //开始发送数据
    $.ajax
    ({ //请求登录处理页
     url: "Login.aspx", //登录处理页
     dataType: "html",
     //传送请求数据
     data: { txtName: strTxtName, txtPass: strTxtPass },
     success: function (strValue) { //登录成功后返回的数据
      //根据返回值进行状态显示
      if (strValue == "True") {//注意是True,不是true
       $(".clsShow").html("操作提示，登录成功！" + strValue);
      }
      else {
       $("#divError").show().html("用户名或密码错误！" + strValue);
      }
     }
    })
   })
  })
 </script>
</head>
<body>
 <form id="frmUserLogin">
 <div class="divFrame">
  <div class="divTitle">
   <span>用户登录</span>
  </div>
  <div class="divContent">
   <div class="clsShow">
    <div id="divError" class="clsError">
    </div>
    <div>
     名称：<input id="txtName" type="text" class="txt" /></div>
    <div>
     密码：<input id="txtPass" type="password" class="txt" /></div>
    <div>
     <input id="btnLogin" type="button" value="登录" class="btn" /> &nbsp
     <input id="btnReset" type="reset" value="取消" class="btn" />
    </div>
   </div>
  </div>
 </div>
 </form>
</body>
</html>

Copy after login

Then, create a new Login.aspx to receive and process the data:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Login.aspx.cs" Inherits="JSDemo.Login" ResponseEncoding="gb2312"%>
<%
 string strName = System.Web.HttpUtility.UrlDecode(Request["txtName"]);
 string strPass = System.Web.HttpUtility.UrlDecode(Request["txtPass"]);
 bool login = false;
 if (strName == "admin" && strPass == "admin")
 {
  login = true;
 }
 Response.Write(login);
%>

Copy after login

Supplement: form submits a complete example using AJAX:

//将form转换为AJAX提交
 function ajaxSubmit(url,frm,fn){
  var dataPara=getFormJson(frm);
  $.ajax({
   url:url,
   type:"post",
   data:dataPara,
   async:false,
   dataType:'txt',
   success:fn
  });
 }
 //将form中的值转换为键值对
 function getFormJson(frm){
  var o={};
  var a=$(frm).serializeArray();
  $.each(a,function(){
   if(o[this.name]!==undefined){
    if(!o[this.name].push){
     o[this.name]=[o[this.name]];
    }
    o[this.name].push(this.value || '');
   }else{
    o[this.name]=this.value || '';
   }
  });
  return o;
 }
/*
 //前台调用方式
 function autoSubmitFun(){
   ajaxSubmit("autoSumitScoreAJAX.action",$('#formId'),function(){});
 }
*/

Copy after login

I hope this article will be helpful to everyone in jQuery programming.