c#验证字符串是否包含匹配的括号 [英] c# validate that string contains matching number of brackets

问题描述

如果我有这样的字符串...

If I have a string like this...

"123[1-5]553[4-52]63244[19-44]"

...什么是验证以下条件的最佳方法:

...what's the best way to validate the following conditions:

1. 每个左括号都有一个匹配的右括号
2. 不超过 3 套括号
3. 没有没有嵌套的方括号(例如[123- [4] 9])

1. Every open bracket has a matching close bracket
2. There are no more than 3 sets of brackets
3. There are no nested brackets (i.e., [123-[4]9])

正则表达式是否能够验证所有这些情况?如果没有，那么LINQ呢?

Would a regex be able to validate all of these scenarios? If not, how about LINQ?

推荐答案

由于不允许嵌套，因此可以使用正则表达式:

Because you don't allow nesting, you can use a regex:

^([^[\]]*\[[^[\]]*\]){0,3}[^[\]]*$

说明:

• (...){0,3}最多匹配以下三组:
  • [^[\]]*匹配可选的非括号字符
  • \[与[匹配以打开一个组
  • [^[\]]*匹配组内的可选非括号字符
  • \]与]匹配以关闭组
  • (...){0,3} matches up to three sets of the following:
    • [^[\]]* matches optional non-bracket characters
    • \[ matches [ to open a group
    • [^[\]]* matches optional non-bracket characters inside the group
    • \] matches ] to close the group

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