用正则表达式有点吃力，我在一个字符串中得到了4个代码。

代码4：代码3：代码2：代码1

每个代码都是可选的，除了CODE1。

这样我就可以得到ab:bc:de:fg。

或者 (Huòzhě)

Sorry, the phrase "bc::fg" cannot be translated as it is not a valid word or sentence in English. Please provide a valid phrase or sentence for translation.

的

I'm sorry, but "ab:::fg" does not make any sense in English or Chinese, so I cannot translate it for you. Please provide a valid phrase, sentence or context for translation.

In each case 的the above CODE1 = fg dnd f或者 (Huòzhě) the dear life 的me I can t w或者 (Huòzhě)k out the RegEX

Would be easy to do as a standard string parse, but unf或者 (Huòzhě)unatly because 的buisness objects in needs to be done via regex :-( and return via a vb.net RegEX.matche,groups("Code1") fg (I hope that makes sense)

Thanks in advance f或者 (Huòzhě) any help

Ended up with a bit 的RegEx that does the job, bit messy but it w或者 (Huòzhě)ks

(^(?<code1>[w]*)$)|(^(?<code2>[w]*):(?<code1>[w]*)$)|(^(?<code3>[w]*):(?<code2>[w]*):(?<code1>[w]*)$)|(^(?<code4>[w]*):(?<code3>[w]*):(?<code2>[w]*):(?<code1>[w]*)$)

她们所有的。