public DAL_YeuCauSuaChua()
{
conn = new DBconnection();
}
public DAL_HoaDon()
{
conn = new DBconnection();
}
public DAL_ThietBiSuaChua()
{
conn = new DBconnection();
}
public DAL_NhanHieu()
{
conn = new DBconnection();
}
public DAL_KhachHang()
{
conn = new DBconnection();
}
public DAL_NhapThietBi()
{
conn = new DBconnection();
}
public DAL_Statistics()
{
conn = new DBconnection();
}
public DAL_SuaChua()
{
conn = new DBconnection();
}
