protected void lBtnDeleteAll_Click(object sender, EventArgs e)
 {
     //删除全部数据
     using (var da = new t_wip_delivery_remark_sampleTableAdapter())
     {
         //执行删除
         da.DeleteAllData();
     }
     //重新绑定数据源
     lvWipDeliveryRemark.DataBind();
 }