protected void btnDelete_Click(object sender, EventArgs e)
        {
            string sellerNick = txtSellerName.Text.Trim();

            if (MsgBLL.DeleteMsgHisForReminder(sellerNick, txt_StartTime1.Value, txt_EndTime1.Value, drpSendType.SelectedValue))
            {
                Response.Write("<script language='javascript'>alert('删除成功!');</script>");
            }
            else
            {
                Response.Write("<script language='javascript'>alert('删除失败!');</script>");
            }
            //重新绑定
            MsgDataBind();
        }