如何用正则表达式匹配双引号或单引号或不带引号的? [英] How to match double quote or single quote or unquoted with regular expression?

问题描述

我试图从所有三种类型的输入中获取一些文本，但无法弄清楚如何处理未引用的情况.

I am trying to grab sometext from all three types of inputs, but can't figure out how to deal with the unquoted case.

到目前为止我有:

name=['"](.*?)['"]

输入:

name="sometext"
name='sometext'
name=sometext

推荐答案

看起来您是 C# 开发人员，因此您可以使用第一个匹配组来确保它以相同的引号关闭(从而支持 phrase="不要忘记撇号").

It looks like you are a C# developer, so you can use the first matching group to ensure it is closed off with the same quote (and thus support phrase="Don't forget apostrophes").

Regex regex1 = new Regex(@"=(?:(['""])(.*?)\1|.*)");

string text = @" 
name=""don't forget me""
name='sometext'
name='sometext'
name=sometext
";

foreach (Match m in regex1.Matches(text))
   Console.WriteLine (m.Groups[2].Value);

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