// kiem tra ton tai cua Hop dong co hay chua
public static bool kiemtraSoHopdongTontai(string sohopdong)
{
return(DAO_DMHopdong.kiemtraSoHopdongTontai(sohopdong));
}
// kiem tra ton tai cua Hop dong co hay chua
public static bool kiemtraSoHopdongTontai(string sohopdong)
{
return(DAO_DMHopdong.kiemtraSoHopdongTontai(sohopdong));
}