private void ShowMsg(int msgId)
 {
     MessageBll mbll = new MessageBll();
     MessageModel model = mbll.GetModel(msgId);
     if (model != null)
     {
         lblContent.Text = model.Content;
         lblMsgId.Text = model.MsgId.ToString();
         lblSender.Text = model.SenderId;
         lblSendTime.Text = model.InsertTime.ToString("yyyy-MM-dd HH:mm");
         lblSubject.Text = model.Subject;
         mbll.SetIsReaded(model.MsgId);
     }
     else
     {
             Response.Write("消息不存在");
             Response.End();
     }
 }
 private string GetMessage(HttpContext context)
 {
     int msgId;
     string result = String.Empty;
     if (!int.TryParse(context.Request["msgId"],out msgId))
     {
         msgId = 0;
     }
     MessageBll mbll = new MessageBll();
     MessageModel model = mbll.GetModel(msgId);
     if (model != null &&  model.UserType==1
         && ((model.UserId == context.User.Identity.Name && model.MsgType==0)
         || (context.User.IsInRole(model.UserId) && model.MsgType==2)
         || model.MsgType==1))
     {
         JavaScriptSerializer jss = new JavaScriptSerializer();
         result = jss.Serialize(model);
         if (model.MsgType == 0)
             mbll.SetIsReaded(model.MsgId);
     }
     return result;
 }