public void ProcessRequest(HttpContext context)
 {
     String associate_id = context.Session["associate_id"].ToString();
     int item_id=Convert.ToInt32(context.Request.QueryString["item_id"]);
     CGamificationBO BO = new CGamificationBO();
     BO.BuyItem(associate_id,item_id);
     context.Response.ContentType = "text/plain";
     context.Response.Write("200");
 }