[英]I can't match a simple username with regex?
It's very simple: 这很简单:
Match match = Regex.Match(username, @"/^[a-z0-9_-]{3,16}$/", RegexOptions.IgnoreCase);
if (!match.Success)
throw new Exception("Manglende/ugyldig brukernavn.");
But no matter what it fails that test. 但是,不管它在那个测试中失败了。 What am I forgetting?
我忘记了什么?
Don't put slashes around the regex: 不要在正则表达式周围加上斜杠:
@"^[a-z0-9_-]{3,16}$"
The slashes are typically used in other languages to delimit a regex. 斜杠通常用于其他语言来划分正则表达式。 But in C#, the entire string is the pattern so additional delimiters are not required.
但在C#中,整个字符串是模式,因此不需要额外的分隔符。
您不需要.net正则表达式中的/ /
。
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