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//后台实例代码 ashx文件(可替换为从数据库中读取)
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
//context.Response.Write("Hello World");
string name = context.Request.Params["name"].ToString().Trim();
if ("china".Equals(name))
{
context.Response.Write("1");//1标志login success
}
else
{
context.Response.Write("0");//0标志login fail
}
}
//前台实例代码 aspx文件
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script src="js/jquery-1.4.2.js" type="text/javascript"></script>
<script type="text/javascript">
$(function() {
$("#test").live("click", function() {
//alert(0);
$.ajax({
type: 'POST',
url: 'Handler1.ashx',
data: { "name": $("#name").val() },
success: function(data) {
if (1 == data)
alert('login success');
else
alert('login fail');
}
});
});
});
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<input type="text" name="name" id="name" />
<input type="button" name="test" id="test" value="validate" />
</div>
</form>
</body>
</html>
<script language="javascript" type="text/javascript">
var xml;
function AJAX()
{
//考虑IE浏览器
xml = new ActiveXObject("Microsoft.XMLHTTP");
xml.open("get","ValidUser.aspx?userId="+document.getElementById("TextBox1").value,true);
xml.send(null);
xml.onreadystatechange = accp;
}
function accp()
{
if(xml.readyState==4)
{
if(xml.status == 200)
{
document.getElementById("Message").innerHTML = xml.ResponseText;
}
}
else
{
document.getElementById("Message").innerHTML = "正在读取数据。。。";
}
}
</script>
protected void Page_Load(object sender, EventArgs e)
{
string value;
string userName = Request.QueryString["userId"].ToString();
if (userName == "admin")
value = userName + "用户已经存在!";
else
value = userName + "用户不存在!";
Response.Write(value);
Response.Flush();
Response.Close();
}