GridView删除数据的有关问题

protected void gvTourInfo_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        Business busi = new Business();
        if (e.CommandName == "Delete")
        {
            int ID = Convert.ToInt32(e.CommandArgument);
            if (busi.DelectYudingInfo(ID) > 0)
            {
                Response.Write("<script> alert('你已删除成功！'); </script>");
            }
            else
            {
                Response.Write("<script> alert('删除失败！'); </script>");
            }
        }
        this.gvTourInfo.EditIndex = -1;
        BindData();
    }