c# - 正则表达式电子邮件错误

Question

当用户无法在网站上注册时，我遇到了一些错误。JS Jquery 验证器通过，但在 Controller (asp) 的一侧 - 不正确 验证。

请告诉我，是否可以获得这种类型的用户电子邮件以及如何验证此电子邮件(通过表达式)？

可验证的电子邮件:“testtest_@gmail.com”

C# 电子邮件模式正则表达式

  const string email_pattern = 
        @"^(([A-Za-z0-9]+_+)|([A-Za-z0-9]+\-+)|([A-Za-z0-9]+\.+)|([A-Za-z0-9]+\++))*[A-Za-z0-9]+@((\w+\-+)|(\w+\.))*\w{1,63}\.[a-zA-Z]{2,6}$"; 

  const string email_pattern3 =
        @"^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$"; 

  const string email_pattern2 =
        @"^(?("")(""[^""]+?""@)|(([0-9a-z]((\.(?!\.))|[-!#\$%&'\*\+/=\?\^`\{\}\|~\w])*)(?<=[0-9a-z])@))(?(\[)(\[(\d{1,3}\.){3}\d{1,3}\])|(([0-9a-z][-\w]*[0-9a-z]*\.)+[a-z0-9]{2,17}))$";

  const string email_pattern3 = @"^(([\w-]+\.)+[\w-]+|([a-zA-Z]{1}|[\w-]{2,}))@"
 + @"((([0-1]?[0-9]{1,2}|25[0-5]|2[0-4][0-9])\.([0-1]?
            [0-9]{1,2}|25[0-5]|2[0-4][0-9])\."
 + @"([0-1]?[0-9]{1,2}|25[0-5]|2[0-4][0-9])\.([0-1]?
            [0-9]{1,2}|25[0-5]|2[0-4][0-9])){1}|"
 + @"([a-zA-Z]+[\w-]+\.)+[a-zA-Z]{2,4})$";

Answer 1

如果您想验证电子邮件地址，Regex 不是正确的选择。

使用MailAddress正如我们自己的极客推荐的那样SLaks

try 
{
   address = new MailAddress(address).Address;
   //address is valid id reached here
} 
catch(FormatException) 
{
   //address is invalid
}

---

但是如果你沉迷于正则表达式..就这样做

.*?@.*

或[如果您想要完整的正则表达式]

由 SLaks 提供

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