使用正则表达式如何检查我的MVC2验证中的空值

Question

任何正文都可以告诉我如何使用正则表达式检查空字符串

[RegularExpression(@"\b(0?[0-9][0-9][0-9])\b", ErrorMessage = "BEI Code should be Only three Chracter Length!")]

我还需要在此验证中查找空字符串

感谢

Answer 1

为什么不使用Required属性旁边的RegularExpression验证属性检查空字符串？

[Required(ErrorMessage = "This field is required")]
[RegularExpression(@"\b(0?[0-9][0-9][0-9])\b", 
                  ErrorMessage = "BEI Code should be Only three Chracter Length!")]