public int Delete1(string maKH)
{
data.Connect();
string sql = "DELETE FROM KhachHang WHERE MaKH ='" + maKH + "'";
int numberOff = data.ExecuteNonQuery(sql);
return(numberOff);
}
public int Delete1(string maSP)
{
data.Connect();
string sql = "DELETE FROM SanPham WHERE MaSP ='" + maSP + "'";
int numberOff = data.ExecuteNonQuery(sql);
return(numberOff);
}