正则表达式在双花括号之间得到任何东西 [英] regex get anything between double curly braces

问题描述

我需要获取.NET中双花括号之间的文本。
我知道了：

I need to get the text between double curly braces in .NET. I got this:

\{{([^}]+)\}}

但是，它还包括双花括号。
是否有排除它们的方法？

However, it also includes the double curly braces. Is there a way to exclude them?

推荐答案

我不是regex的大师，但这应该可以工作并回答有关在此之前和之后专门选择元素的问题。试试：

I'm no master of regex, but this ought to work and answers your question about exclusively selecting elements before and after. Try:

(?<=\{\{).*(?=\}\})

如果您想对此进行解释，我将向您介绍：

（？< = \ {\ {）是正向隐藏 的开始 *，它在您要查找的内容之后匹配一个组，但不将其包含在结果中。这基本上是您要求的第一部分。 \ {\ {）是您实际上正在寻找的转义字符。

If you'd like an explanation as to why this works, I'll walk you through it:
(?<=\{\{) is the start of a positive lookbehind*, which matches a group after what you're looking for without including it in the result. This is basically the first part of what you asked for. The \{\{) are the escaped characters you're actually looking for.

。* 表示您想选择任意次数，直到得到为止到组（？= \} \}），这是正向超前，本质上是您要查找的第二部分。这将选择该选择器后面的所有内容，即两个转义的花括号，而不选择花括号本身。

.* is saying you'd like to select anything any amount of times until you get to the group (?=\}\}) which is a positive lookahead, essentially the second part of what you're looking for. This selects everything behind that selector, the two escaped end curly braces, without selecting the braces themselves.

*注意！ javascript 不支持正向查找。

*note! Positive lookbehinds are not supported in javascript.

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