C# 在正则表达式模式中使用括号
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Using parenthesis in Regular Expressions pattern
提问by NLV
I've a string "This text has some (text inside parenthesis)". So i want to retrieve the text inside the parenthesis using Regular Expressions in C#. But parenthesis is already a reserved character in regular expressions. So how to get it?
我有一个字符串“此文本有一些（括号内的文本）”。所以我想在 C# 中使用正则表达式检索括号内的文本。但是括号已经是正则表达式中的保留字符。那么如何获得呢？
Update 1
更新 1
so for the text "afasdfas (2009)"
所以对于文本“afasdfas (2009)”
I tried (.)/s((/d+))and (.) (\d+)and (.*)/s((/d/d/d/d)). None of them is working. Any ideas?
我试着(.)/s((/d+))和(.) (\d+)和(.*)/s((/d/d/d/d))。他们都没有工作。有任何想法吗？
采纳答案by Brian Kim
You can either use backslash or Regex.Escape().
您可以使用反斜杠或Regex.Escape()。
回答by Diadistis
Like this:
像这样：
// For "This text has some (text inside parenthesis)"
Regex RegexObj = new Regex(@"\(([^\)]*)\)");
// For "afasdfas (2009)"
Regex RegexObj = new Regex(@"\((\d+)\)");
Edit:
编辑：
@SealedSun, CannibalSmith : Changed. I also use @"" but this was c/p from RegexBuddy :P
@SealedSun，食人者史密斯：改变了。我也使用 @"" 但这是来自 RegexBuddy 的 c/p :P
@Gregg : Yes, it is indeed faster, but I prefer to keep it simpler for answering such questions.
@Gregg ：是的，它确实更快，但我更喜欢让它更简单地回答此类问题。
回答by Parrots
You can escape the parenthesis using the backslash. C# Reg Expression Cheet Sheet
您可以使用反斜杠转义括号。C# Reg 表达式 Cheet 表
回答by Gregg
For any characters that are "special" for a regular expression, you can just escape them with a backslash "\". So for example:
对于正则表达式的任何“特殊”字符，您可以使用反斜杠“\”将它们转义。例如：
\([^\)]*\)
Would capture "(text inside parenthesis)" in your example string.
将在您的示例字符串中捕获“（括号内的文本）”。
[^\)]*
Should be slightly safer than just "." within the parenthesis, and should also be faster.
应该比“.”稍微安全一些。在括号内，也应该更快。
回答by Sara
Just add \(, \)around your Parenthesis.
for example:
只需在括号周围添加\(, 即可\)。例如：
(PatternInsideParenthesis)
(PatternInsideParenthesis)
will be like this:
将是这样的：
\((PatternInsideParenthesis)\)
\((PatternInsideParenthesis)\)
