如何使用.Net的RegEx从字符串中提取所有{}标记？

Question

我需要从给定字符串中提取用大括号标记的标记。

我尝试使用Expresso来构造可以解析的东西......

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"{Token1}asdasasd{Token2}asd asdacscadase dfb db {Token3}"
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并生成“Token1”，“Token2”，“Token3”

我尝试过使用..

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({.+})
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......但这似乎与整个表达相匹配。

有什么想法吗？

Answer 1

尝试

\{(.*?)\}

The \{ will escape the "{" (which has meaning in a RegEx).
The \} likewise escapes the closing } backet.
The .*? will take minimal data, instead of just .* 
which is "greedy" and takes everything it can.

If you have assurance that your tokens will (or need to) 
be of a specific format, you can replace .* with an appropriate 
character class. For example, in the likely case you 
want only words, you can use (\w*) in place of the (.*?) 
This has the advantage that closing } characters are not 
part of the class being matched in the inner expression, 
so you don't need the ? modifier). 

Answer 2

尝试：

\{([^}]*)\}

这会将搜索范围内的搜索限制在关闭支撑上停止。

Answer 3

另一种解决方案：

(?<=\{)([^\}]+)(?=\})

这使用前瞻和后视，因此根本不会消耗括号。

Answer 4

大括号在正则表达式中具有特殊含义，因此您必须将它们转义。使用\{和\}匹配它们。