Question

我在我的项目中使用Asp.Net/C#。在我的一个表单中，我使用Regular Expression Validator来验证电子邮件地址。我搜索了一些验证电子邮件的示例。我发现了{{1} } 任何人都可以向我解释这种模式，它会非常有用。非常感谢任何解释。

感谢。

Answer 1

一些简短的提示：

\ w代表单词字符
[ - +。']为大括号中的一个字符
plus和*是量词
（）包围一个可以创建反向引用的组（您可以引用或以编程方式读取的内容）

更长（自动）的解释：

\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*

Match a single character that is a “word character” (letters, digits, and underscores)     «\w+»
   Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»
Match the regular expression below and capture its match into backreference number 1 «([-+.']\w+)*»
   Between zero and unlimited times, as many times as possible, giving back as needed (greedy) «*»
   Note: You repeated the capturing group itself.  The group will capture only the last  iteration.  Put a capturing group around the repeated group to capture all iterations. «*»
   Match a single character present in the list “-+.'” «[-+.']»
   Match a single character that is a “word character” (letters, digits, and underscores) «\w+»
      Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»
Match the character “@” literally «@»
Match a single character that is a “word character” (letters, digits, and underscores) «\w+»
   Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»
Match the regular expression below and capture its match into backreference number 2 «([-.]\w+)*»
   Between zero and unlimited times, as many times as possible, giving back as needed (greedy) «*»
   Note: You repeated the capturing group itself.  The group will capture only the last iteration.  Put a capturing group around the repeated group to capture all iterations. «*»
   Match a single character present in the list “-.” «[-.]»
   Match a single character that is a “word character” (letters, digits, and underscores) «\w+»
      Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»
Match the character “.” literally «\.»
Match a single character that is a “word character” (letters, digits, and underscores) «\w+»
   Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»
Match the regular expression below and capture its match into backreference number 3 «([-.]\w+)*»
   Between zero and unlimited times, as many times as possible, giving back as needed (greedy) «*»
   Note: You repeated the capturing group itself.  The group will capture only the last iteration.  Put a capturing group around the repeated group to capture all iterations. «*»
   Match a single character present in the list “-.” «[-.]»
   Match a single character that is a “word character” (letters, digits, and underscores) «\w+»
      Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»

我使用RegexBuddy创建了更长，更自动的解释

修改

要获得正则表达式的一些入门信息，您可以查看http://www.regular-expressions.info/

有关特定正则表达式模式的说明

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