我无法获得使用MVC3RTM的正则表达式的客户端验证。当我注释掉RegularExpression属性时，所有其他客户端验证都有效，所以我知道它是导致我出现问题的那个。
我有一个简单的模型。 （SiteText和SiteErrors只是资源文件）
public class NewUser {
[Required]
[MultiCulturalDisplayName("UserName", typeof(SiteText))]
public string UserName { get; set; }
[Required]
[AllowHtml]
[RegularExpression(RegExConstants.EmailRegEx, ErrorMessageResourceType = typeof(SiteErrors), ErrorMessageResourceName = "EmailInvalid")]
[DataType(DataType.EmailAddress)]
[MultiCulturalDisplayName("EmailAddress", typeof(SiteText))]
public string Email { get; set; }
[Required]
[ValidatePasswordLength]
[DataType(DataType.Password)]
[MultiCulturalDisplayName("Password", typeof(SiteText))]
public string Password { get; set; }
[DataType(DataType.Password)]
[MultiCulturalDisplayName("PasswordConfirm", typeof(SiteText))]
[Compare("Password", ErrorMessageResourceType = typeof(SiteErrors), ErrorMessageResourceName = "PasswordCompare")]
public string ConfirmPassword { get; set; }
}
这是我存储在常量中的C＃转义正则表达式字符串。
^((?>[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+\\x20*|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\"\\x20*)*(?<angle><))?((?!\\.)(?>\\.?[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+)+|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\")@(((?!-)[a-zA-Z\\d\\-]+(?<!-)\\.)+[a-zA-Z]{2,}|\\[(((?(?<!\\[)\\.)(25[0-5]|2[0-4]\\d|[01]?\\d?\\d)){4}|[a-zA-Z\\d\\-]*[a-zA-Z\\d]:((?=[\\x01-\\x7f])[^\\\\\\[\\]]|\\\\[\\x01-\\x7f])+)\\])(?(angle)>)$
这是未转义的版本。
^((?>[a-zA-Z\d!#$%&'*+\-/=?^_`{|}~]+\x20*|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*"\x20*)*(?<angle><))?((?!\.)(?>\.?[a-zA-Z\d!#$%&'*+\-/=?^_`{|}~]+)+|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*")@(((?!-)[a-zA-Z\d\-]+(?<!-)\.)+[a-zA-Z]{2,}|\[(((?(?<!\[)\.)(25[0-5]|2[0-4]\d|[01]?\d?\d)){4}|[a-zA-Z\d\-]*[a-zA-Z\d]:((?=[\x01-\x7f])[^\\\[\]]|\\[\x01-\x7f])+)\])(?(angle)>)$
正则表达式可能太长了吗？
答案 0 :(得分：3)
除了正则表达式参数 - 请查看我的博客文章，了解如何使用ASP.NET MVC 3和不显眼的验证在客户端上进行电子邮件验证。
此方法使用内置的jQuery Validation电子邮件验证，而不是您自己的正则表达式。但是会在服务器端使用你的正则表达式。我不知道jQuery验证使用什么样的正则表达式，所以这可能是好事还是坏事。
ASP.NET MVC 3 Email Validation with Unobtrusive jQuery Validation
这非常简单，如果你想改变正则表达式，只需插入你自己的正则表达式。
这是它的内脏：
namespace PageDesigners.Library.ValidationAttributes
{
public class EmailAttribute : RegularExpressionAttribute, IClientValidatable
{
public EmailAttribute()
: base(@"^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}" +
@"\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\" +
@".)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$")
{
}
public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
{
var errorMessage = FormatErrorMessage(metadata.GetDisplayName());
yield return new EmailValidationRule(errorMessage);
}
}
public class EmailValidationRule : ModelClientValidationRule
{
public EmailValidationRule(string errorMessage)
{
ErrorMessage = errorMessage;
ValidationType = "email";
}
}
}
答案 1 :(得分：2)
首先让我们以详细，评论很好的格式仔细研究你的正则表达式：
Regex regexObj = new Regex(
@"# Match an email address with optional leading words.
^ # Anchor to start of string
( # $1: Stuff preceding email address.
(?> # Either...
[a-zA-Z\d!#$%&'*+\-/=?^_`{|}~] # A 'word' followed by
+\x20* # zero or more spaces,
| "" # or a double quoted string
( (?=[\x01-\x7f])[^""\\] # consisting of either one regular
| \\[\x01-\x7f] # or one escaped character,
)* # zero or more, followed by
""\x20* # zero or more spaces.
)* # Zero or more preceding stuff.
(?<angle><) # $angle: < required before email
)? # address if there is stuff before.
( # $2: Email address name portion.
(?!\.) # Must not start with literal dot.
(?>\.? # A dot separates each
[a-zA-Z\d!#$%&'*+\-/=?^_`{|}~]+ # name-word.
)+ # One or more dot-separated name-words.
| "" # or a double quoted string
( (?=[\x01-\x7f])[^""\\] # consisting of either one regular
| \\[\x01-\x7f] # or one escaped character,
)* # zero or more.
"" # Closing quote.
) # End $2: Email address name portion.
@ # @ separates name and domain portions.
( # $3: Email domain portion.
((?!-)[a-zA-Z\d\-]+(?<!-)\.)+ # One or more dot separated subdomains
[a-zA-Z]{2,} # followed by top level domain,
| \[ # or a IP literal host address
( # $4: A literal IP address.
( # $5: An IPv4 address
(?(?<!\[)\.) # Dot comes before all but first digit.
(25[0-5]|2[0-4]\d|[01]?\d?\d) # ($6:) Each digit is from 0-255.
){4} # Four dotted-quad numbers required.
| [a-zA-Z\d\-]*[a-zA-Z\d]: # Or a word followed by a colon
( # ($6:) followed by
(?=[\x01-\x7f])[^\\[\]] # non-escaped ASCII char except '[]'
|\\[\x01-\x7f] # or any escaped non-NULL, ASCII char
)+ # One or more of these following colon.
)\] # End $4: The literal IP address.
) # End $3: Email domain portion.
(?(angle)>) # If there was a <, match closing >.
$ # Anchor to start of string.
",
RegexOptions.IgnorePatternWhitespace);
请注意，此正则表达式允许在实际电子邮件地址之前显示多个单词。我的测试显示这个电子邮件匹配子表达式实际上工作得很好（尽管我对文字IP域子表达式有严重怀疑。）
但在您的问题得到解答之前，我们需要了解正则表达式是如何在您的代码中实际编译和应用的......
P.S。我见过的最准确的（仅仅是人类可读的）电子邮件验证码是：PHP : Parsing Email Adresses in PHP作者：Cal Henderson。
答案 2 :(得分：0)
试试这个：
[RegularExpression(@"[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}", ErrorMessage = " Invalid Email")]