/// <reference path="jquery-1.10.2.js" />
$(function () {
???$("#btnLogin").click(function () {
???????var qq = $.trim($("#txtQQ").val());
???????var pwd = $.trim($("#txtPwd").val());
???????if (qq == "" || pwd == "") {
???????????alert("qq或密码不能为空");
???????} else {
???????????$.post("../ajax/Handler1.ashx", { "qq": qq, "pwd": pwd }, function (data) {
???????????????//switch (data) {
???????????????// ???case "1":
???????????????// ???????alert("登录成功");
???????????????// ???????break;
???????????????// ???case "2":
???????????????// ???????alert("QQ或者密码错误");
???????????????// ???????break;
???????????????// ???case "3":
???????????????// ???????alert("程序异常");
???????????????// ???????break;
??????????// }
???????????????var data=JSON.parse(data);
???????????????if(data.Success==true){
???????????????????alert(data.Msg);
???????????????}else{
???????????????????alert(data.Msg);
???????????????}
???????????});
???????};
???})
})
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="exercise_20180305.WebForm1" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
???<title></title>
???<script src="js/jquery-1.10.2.js"></script>
???<script src="js/WebForm1.js"></script>
</head>
<body>
???<form id="form1" runat="server">
???<div>
???<table>
???????<tr><td>QQ：</td><td><input type="text" id="txtQQ" /></td></tr>
???????<tr><td>密码：</td><td><input type="password" id="txtPwd" /></td></tr>
???????<tr><td><input type="button" value="登录" id="btnLogin" /></td></tr>
???</table>
???</div>
???</form>
</body>
</html>
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data.SqlClient;
using System.Linq;
using System.Web;
using System.Web.Script.Serialization;
using System.Collections;
namespace exercise_20180305.ajax
{
???public class ReturnMsg
???{
???????public bool Success { get; set; }
???????public string Msg { get; set; }
???????public int ReCount { get; set; }
???}
???/// <summary>
???/// Handler1 的摘要说明
???/// </summary>
???public class Handler1 : IHttpHandler
???{
???????string connStr = ConfigurationManager.ConnectionStrings["sq_ruanmou"].ToString();
???????SqlConnection con = null;
???????SqlCommand cmd = null;
???????
???????public void OpenDB()
???????{
???????????con = new SqlConnection(connStr);
???????????con.Open();
???????}
???????public void ProcessRequest(HttpContext context)
???????{
???????????ReturnMsg rmsg = new ReturnMsg();
???????????JavaScriptSerializer jss = new JavaScriptSerializer();
??????????// Dictionary<string,object> dic=new Dictionary<string,object>;
???????????try
???????????{
???????????????string qq = context.Request.Form["qq"];
???????????????string pwd = context.Request.Form["pwd"];
???????????????
???????????????string sql = "select count(*) from UserInfor where QQ=@QQ and Pwd=@Pwd";
???????????????SqlParameter[] para = new SqlParameter[]{
???????????????????????new SqlParameter("@QQ",qq),
???????????????????????new SqlParameter("@Pwd",pwd)
???????????????????};
???????????????OpenDB();
???????????????using (cmd = new SqlCommand(sql, con))
???????????????{
???????????????????foreach (var p in para)
???????????????????{
???????????????????????cmd.Parameters.Add(p);
???????????????????};
???????????????????int icount = Convert.ToInt32(cmd.ExecuteScalar().ToString());
???????????????????rmsg.ReCount = icount;
???????????????????if (icount > 0)
???????????????????{
???????????????????????rmsg.Success = true;
???????????????????????rmsg.Msg = "登录成功";
???????????????????????//dic.Add("Success":true）;
???????????????????????//dic.Add("Msg":"登录成功");
???????????????????}
???????????????????else
???????????????????{
???????????????????????rmsg.Success = false;
???????????????????????rmsg.Msg = "QQ或者密码错误";
???????????????????????//dic.Add("Success":false）;
???????????????????????//dic.Add("Msg":"QQ或者密码错误");
???????????????????}
???????????????}
???????????}
???????????catch (Exception ex)
???????????{
???????????????rmsg.Success = false;
???????????????rmsg.Msg = "程序异常";
???????????????//dic.Add("Success":false）;
???????????????//dic.Add("Msg":"程序异常");
???????????}
???????????context.Response.Write(jss.Serialize(rmsg));
???????????//context.Response.Write(jss.Serialize(dic));
???????}
???????public bool IsReusable
???????{
???????????get
???????????{
???????????????return false;
???????????}
???????}
???}
}
用ajax传JSON数据
原文地址：https://www.cnblogs.com/sunshinezjb/p/8538618.html