jquery ajax post ashx

var data = {ClId:ClId,Title: Title,Subhead: Subhead,BeginTime: BeginTime,
EndTime:EndTime ,TelecastType:TelecastType,Teacherkey: Teacherkey ,AssistantTeacherKey: AssistantTeacherKey ,
StudentClientKey: StudentClientKey ,StudentWebKey:StudentWebKey ,
TelecastDateContent:TelecastDateContent ,TelecastDescription: TelecastDescription ,
TeacherId: TeacherId ,Status: Status ,ImgUrl: ImgUrl ,SDKID:SDKID ,
DelayModel:DelayModel }

$.ajax({
type: "POST",
url: "/Manage/usercenter/data/TelecastLessionInfo.ashx?action=update",
//url: "/Manage/usercenter/zhibo/update/save",
//contentType: "application/json",
//dataType: "json",
data: data,
success: function (result) {
alert("修改直播课堂成功！");
window.location.href = "/Manage/usercenter/zhibo/index";
},
error: function () {
alert("修改直播课堂失败！");
}
});

        public void ProcessRequest(HttpContext context)
        {
            string FilePath = System.Web.HttpContext.Current.Server.MapPath("~/") + "/log/zhibo/log_" + DateTime.Now.ToString("yyyy-MM-dd") + ".txt";
            WebTools.FileOper.FileStream fs = new WebTools.FileOper.FileStream(FilePath);
            context.Response.ContentType = "text/plain";
            HttpRequest request = context.Request;
            HttpResponse response = context.Response;

            try
            {
                string action = string.Empty;
                if (request.QueryString["action"] == null)
                {
                    response.Write("无法获取到action参数！");
                    fs.WriteFile("LuoBo-" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + "无法获取到KeTangSDKID参数！" + Environment.NewLine, Encoding.UTF8, true);
                    return;
                }
                action = request.QueryString["action"].ToString();
                string strResult = string.Empty;
                switch (action)
                {
                    case "single":
                        if (request.QueryString["ClId"] == null)
                        {
                            response.Write("无法获取到ClId参数！");
                            fs.WriteFile("LuoBo-" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + "无法获取到ClId参数！" + Environment.NewLine, Encoding.UTF8, true);
                            return;
                        }
                        int nClId = Convert.ToInt32(request.QueryString["ClId"]);
                        strResult = GetSingleTelecastLessionInfo(nClId);break;
                    case "list":
                        strResult = GetTelecastLessionInfoList(); break;
                    case "update":

                //        {
                //            ClId: ClId,Title: Title,Subhead: Subhead,BeginTime: BeginTime,
                //EndTime: EndTime ,TelecastType: TelecastType,Teacherkey: Teacherkey ,AssistantTeacherKey: AssistantTeacherKey ,
                //StudentClientKey: StudentClientKey ,StudentWebKey: StudentWebKey ,
                //TelecastDateContent: TelecastDateContent ,TelecastDescription: TelecastDescription ,
                //TeacherId: TeacherId ,Status: Status ,ImgUrl: ImgUrl ,SDKID: SDKID ,
                //DelayModel: DelayModel }

                        string strClId = request["ClId"];