public void suaNCC(NhaCungCap x)
{
string sql = "UPDATE NhaCungCap SET tenNhaCC = N'" + x.tenNCC + "', diaChi = N'" + x.diaChi + "', SDT = '" + x.SDT + "' WHERE maNhaCC = '" + x.maNCC + "'";
db.WriteData(sql);
}
public void themNCC(NhaCungCap x)
{
string sql = "INSERT INTO NhaCungCap VALUES('" + x.maNCC + "',N'" + x.tenNCC + "',N'" + x.diaChi + "','" + x.SDT + "')";
db.WriteData(sql);
}