如何根據所選國家/地區在MVC3中編寫用於美國或加拿大郵政編碼驗證的自定義驗證器? [英]How do I write a custom validator in MVC3 for US or Canada zip code validation, based on the selected country?
如何在C#或SQL Server中找到郵政編碼之間的距離? [英]How can you find the distance between zip codes in C# or SQL Server?