private void messagesList_RowDeleting(object sender, GridViewDeleteEventArgs e)
        {
            long receiveMessageId = (long)messagesList.DataKeys[e.RowIndex].Value;

            if (NoticeHelper.DeleteReceivedMessage(receiveMessageId))
            {
                ShowMsg("删除成功", true);
                BindData();
            }
            else
            {
                ShowMsg("删除失败", true);
            }
        }