<script type="text/javascript" src="/js/jquery-1.4.js"></script>
<script type="text/javascript">
function jsonTest1()
{
$.ajax({
url:"Handler.ashx",
data:{"type":"ajax"},
datatype:"json",
type:"get",
success:function(data)
{
document.getElementById('div1').innerHTML=data;//因为mime类型是文本 所以返回回来的是json格式的字符串
}
});
}
function jsonTest2()
{
$.getJSON(
'Handler.ashx',
{'type': 'json','name':'qixuejia' }, //类型格式
function(data)
{
for(var i=0;i<data.length;i++)
{
alert(data[i]["UserId"])
}
}
);
}
</script>
<form id="form1" runat="server">
<div id="div1">
</div>
<input type="button" value="jQuery.ajax()" onclick="jsonTest1()"/>
<input type="button" value="jQuery.getJSON()" onclick="jsonTest2()"/>
</form>

public void ProcessRequest(HttpContext context)
{
if (context.Request.Params["type"].Equals("ajax"))
{
context.Response.ContentType = "text/plain";
}
else
{
context.Response.ContentType = "application/json";
}
GetInfo(context);
}
public bool IsReusable
{
get
{
return false;
}
}
public void GetInfo(HttpContext context)
{
System.Collections.Generic.List<UserInfo> listUser = UserInfoManage.GetUserInfoBySQL("Select Top 5 * From Userinfo");
IsoDateTimeConverter timeConverter = new IsoDateTimeConverter();
timeConverter.DateTimeFormat = "yyyy'-'MM'-'dd' 'HH':'mm':'ss";
string ResJsonStr = JsonConvert.SerializeObject(listUser, timeConverter);
context.Response.Write(ResJsonStr);
}