public DataSet DsHoaDon()
{
return(db.ExecuteQueryDataSet("select * from HoaDon", CommandType.Text, null));
}
//lay thong tin Thiet bi
public DataSet DsPhieu()
{
return(db.ExecuteQueryDataSet("select * from Phieu", CommandType.Text, null));
}
//lay thong tin san pham
public DataSet DsKhachHang()
{
return(db.ExecuteQueryDataSet("execute LoadDsKH", CommandType.Text, null));
}
public DataSet _DsTBKH_()
{
return(db.ExecuteQueryDataSet("execute _DsTBKH_", CommandType.Text, null));
}