获得"未终止的[]集"错误在C＃ [英] Getting "Unterminated [] set." Error in C#

问题描述

我在C＃以下的正则表达式的工作。

I am working with following regex in C#

Regex find = new Regex("[,\"]url(?<Url>[^\\]+)\\u0026");

和收到此错误：

"System.ArgumentException: parsing "[,"]url([^\]+)\u0026" - Unterminated [] set.

我是一种新的正则表达式正确等等。我，如果我错了，正则表达式应该是从文本中提取匹配的URL，如：

I'm kind of new to regular expressions so correct me if I'm wrong. The regular expression is supposed to extract urls from text matching like:

，URL = HTTP：//domain.com\\\&

,url=http://domain.com\u0026

URL = HTTP：//hello.com\\\&

"url=http://hello.com\u0026

推荐答案

你需要使用一个逐字字符串：

You need to use a verbatim string:

Regex find = new Regex(@"[,""]url(?<Url>[^\\]+)\\u0026");

编辑：不过，我正则表达式改为

However, I'd change the regex to

Regex find = new Regex(@"(?<=[,""]url=)[^\\]+(?=\\u0026)");

那么整个比赛是URL本身。不需要一个捕获子组

Then the entire match is the URL itself. No need for a capturing sub-group.

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