public Boolean Add(LoaiMon lm)
{
try
{
if (_db.LoaiMons.Find(lm.IDLoaiMon) == null)
{
_db.LoaiMons.Add(lm);
_db.SaveChanges();
return(true);
}
throw new Exception("IDLoaiMon đã tồn tại!");
}
catch (DBConcurrencyException ex)
{
throw ex;
}
}
public Boolean Add(ThucDon td)
{
try
{
if (_db.ThucDons.Find(td.IDMon) == null)
{
_db.ThucDons.Add(td);
_db.SaveChanges();
return(true);
}
throw new Exception("IDMon đã tồn tại!");
}
catch (DBConcurrencyException ex)
{
throw ex;
}
}
public Boolean Add(DatMon dm)
{
try
{
DatMon datMon = _db.DatMons.Find(dm.IDDatMon);
if (datMon == null)
{
_db.DatMons.Add(dm);
_db.SaveChanges();
return(true);
}
throw new Exception("IDDatMon đã tồn tại!");
}
catch (Exception ex)
{
throw ex;
}
}
public Boolean Add(ChiTietDatMon ctdm)
{
try
{
_db.ChiTietDatMons.Add(ctdm);
_db.SaveChanges();
return(true);
}
catch (Exception ex)
{
throw ex;
}
}