c# - 匹配以下正则表达式：#*:*#

Question

我想查找一个字符串是否包含一个以哈希 (#) 开头和结尾并包含冒号 (:) 的正则表达式。所有这些都应该在同一行匹配

示例：你好 #some:test# 和 George MATCH

示例： hello to #:# world NO MATCH

示例： hello to #test:# world NO MATCH

示例：你好 #:test# world NO MATCH

例子：

你好[换行符]

到 #some:test# world NO MATCH

谢谢， 雅尼斯

Answer 1

这应该这样做：

@"\#.+:.+\#"

分解：

\#   - Match a # character
.+   - Followed by one or more characters
:    - Followed by a : character
.+   - Followed by one or more characters
\#   - Followed by a # character

请注意，.它将匹配任何字符，并且可能不是最有效的正则表达式。

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非贪婪版本（更高效）：

@"\#[^:]+:[^#]+\#"

\#    - Match a # character
[^:]+ - Followed by one or more characters that are not :
:     - Followed by a : character
[^#]+ - Followed by one or more characters that are not #
\#    - Followed by a # character