// ham update
public void update(string maloai, string tenloai)
{
LoaiBanh loaiBanh = db.LoaiBanhs.Single(p => p.MaLoaiBanh == maloai);
loaiBanh.TenLoaiBanh = tenloai;
db.SubmitChanges();
}
// ham xoa loai banh
public void delete(string maloai)
{
LoaiBanh loaiBanh = db.LoaiBanhs.Single(p => p.MaLoaiBanh == maloai);
db.LoaiBanhs.DeleteOnSubmit(loaiBanh);
db.SubmitChanges();
}
// ham them loai banh
public void insert(string tenloai)
{
LoaiBanh loaiBanh = new LoaiBanh();
loaiBanh.MaLoaiBanh = laymabanh();
loaiBanh.TenLoaiBanh = tenloai;
db.LoaiBanhs.InsertOnSubmit(loaiBanh);
db.SubmitChanges();
}