private void UploadAnh() { if (!String.IsNullOrEmpty(txtMa.Text)) { conn.ExecuteNonQuery("DELETE AnhSanPham where sanphamId = " + Int32.Parse(txtMa.Text)); if (picAnh1.Image != null) { conn.ExecuteNonQuery("insert into AnhSanPham (sanphamId,anh) values (" + Int32.Parse(txtMa.Text) + ",'" + Ham.GetStringFromImage(picAnh1.Image) + "')"); } if (picAnh2.Image != null) { conn.ExecuteNonQuery("insert into AnhSanPham (sanphamId,anh) values (" + Int32.Parse(txtMa.Text) + ",'" + Ham.GetStringFromImage(picAnh2.Image) + "')"); } } else { MessageBox.Show("Bạn chưa chọn sản phẩm", "Thông báo"); } }