public BUS.Day DuLieuKV(int maday)
        {
            DataSet ds = day.LayDLMotDong(maday);

            BUS.Day dv = new BUS.Day();
            dv.Maday  = Convert.ToInt32(ds.Tables[0].Rows[0]["MaDay"]);
            dv.Makv   = ds.Tables[0].Rows[0]["MaKV"].ToString();
            dv.Tenday = ds.Tables[0].Rows[0]["TenDay"].ToString();
            return(dv);
        }