用AJAX为什么界面上没信息

处理程序:
public void ProcessRequest(HttpContext context)
{
// context.Response.ContentType = "text/plain";
// context.Response.Write("Hello World");
DataTable dt = DAL.RoomInfo.RoomInfos();
List room = new List();
foreach (DataRow dr in dt.Rows)
{
Model.Rooms u = new Model.Rooms();
u.Rid = Convert.ToInt16(dr["rid"]);
u.Rprice = dr["rprice"].ToString();
u.Rtype = dr["rtype"].ToString();
u.Toward = dr["toward"].ToString();

room.Add(u);
}
JavaScriptSerializer jv = new JavaScriptSerializer();
string s = jv.Serialize(jv);
context.Response.Write(s);
}
页面部分:
$(function () {
$.ajax({
type: "get",
url: "/Handler/GetRoomInfo.ashx",
dataType: "json",
success: function (data)
{
var s = "";
$.each(data, function (index,o) {
s+="",
s+=""+o.rid+"";
s+=""+o.rprice+"";
s+=""+o.rtype+"";
s += "" + o.toward + "";
s += "";
})
$("#RoomInfo tr:gt(0)").remove();
$("#RoomInfo").append(s);
}
})
})

用fiddler调试下，看你的服务器返回了什么状态，返回的json是否正确，还是反悔了什么错误状态。

增加下面3句alert看都执行没有。一个都没执行说明jquery没有正确导入，或者执行这个代码之前的代码报错了导致没执行，如果执行了ajaxSendEnd，没执行SUCCESS，那就是你动态页有问题

     $(function () {
        alert('ajaxSend')//////////
        $.ajax({
            type: "get",
            url: "/Handler/GetRoomInfo.ashx",
            dataType: "json",
            success: function (data) {
                alert('SUCCESS')//////////
                var s = "";
                $.each(data, function (index, o) {
                    s += "",
                    s += "" + o.rid + "";
                    s += "" + o.rprice + "";
                    s += "" + o.rtype + "";
                    s += "" + o.toward + "";
                    s += "";
                })
                $("#RoomInfo tr:gt(0)").remove();
                $("#RoomInfo").append(s);
            },error:function(xhr){alert(xhr.responseText)}//执行error看服务器返回什么内容
        })
        alert('ajaxSendEnd')////////
    })