<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script src="js/Jquery1.7.js" type="text/javascript"></script>
<script type="text/javascript">
$(function () {
$('#txtUserName').blur(function () {
$.ajax({
type: "post",contentType: "application/json",url: "WebService1.asmx/ValidateUser",data: "{username:'" + $('#txtUserName').val() + "'}",success: function (result) {
$('#spinfo').text(result.d);
}
})
})
})
</script>
</head>
<body>
<div>
用户名<input type="text" id="txtUserName" /><span id="spinfo"></span><br />
密码<input type="text" id="txtPwd" />
</div>
</body>
</html>
WebService1.asmx
[WebMethod]
public string ValidateUser(string username)
{
if (username == "onlifes")
{
return "用户名已被占用，请选择其他";
}
else
{
return "可以使用，请继续";
}
}
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script src="js/Jquery1.7.js" type="text/javascript"></script>
<script type="text/javascript">
$(function () {
$('#Button1').click(function () {
var username = $('#txtUserName').val();
var pwd = $('#txtPwd').val();
$.ajax({
type: "post",url: "WebService1.asmx/Login",data: "{username:'" + username + "',pwd:'" + pwd + "'}",success: function (bukeyi) {
if (bukeyi.d == 'true') {
window.location = 'HTMLPage2.htm';
}
else {
$('#divinfo').text("用户名或密码错误");
}
}
})
})
})
</script>
</head>
<body>
用户名<input id="txtUserName" type="text" /><br />
密码<input id="txtPwd" type="text" /><br />
<input id="Button1" type="button" value="登录" /><br />
<div id="divinfo"></div>
</body>
</html>
WebService1.asmx
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
namespace WebAjax
{
/// <summary>
/// WebService1 的摘要说明
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolBoxItem(false)]
// 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消对下行的注释。
[System.Web.Script.Services.ScriptService]
public class WebService1 : System.Web.Services.WebService
{
[WebMethod]
public string HelloWorld()
{
return "Hello World";
}
[WebMethod]
public string Login(string username,string pwd)
{
if (username == "admin" && pwd == "888888")
{
return "true";
}
else
{
return "false";
}
}
}
}
原文链接：https://www.f2er.com/ajax/166367.html