正则表达式基于特定模式匹配字符串

Question

How do I match a string using Regex based on a pattern with certain amount of characters to look for?

Example:

|V.2|58|
10001|W20101|W20101|G00001||||學徒劍盾|8|9|768||-1|1||||||||40002||||||1|14||2||40027|40028|40029|40030||2|22|113|||||||||||2|50|100|7|||||
10002|W30101|W30101|G00001||||學徒大斧|9|9|768||-1|1||||||||40003||||||1|17||3||40031|40032|40033|40034||2|26|142|||||||||||2|50|100|9|||||

If I know there's 58 vertical bars on each line then how would I set up a regex to match those strings based on the information I have? And as you also can tell the 58 at the top is the amount of vertical bars there should be in each string.

10479|I00208||G00005||||青鐵礦|29||0||-1|30||||3|||||||||100|5|1||54|$53$原始的礦石，整體泛著鐵青的色澤。

#IMG$NoticeIcon#30~45級的副本掉落或跟公會商人購買。
$7$能與其他材料結合，製作40級的合金材料。
|||||||||||||||||||||||||||

Another example is this. This one has multiple lines but is still within the 58 vertical bars' range.

Is there a way to match the pattern exactly based on the amount of vertical bars there is?

Thanks in advance!

Answer 1

To answer your immediate question, yes, you can match this with a regex:

^[^|]*(?:\|[^|]*){58}*$

when compiled using RegexOptions.Multiline , will match from the first character of a line until exactly 58 bars (and any non-bar characters after that) have been matched.

Test it live on regex101.com .

It's completely context-unaware, though, so it absolutely relies on that number. In your example file, you'd need to exclude the first line from matching - otherwise those two bars will be included in the first match.

However, it looks like you're not using the right tool for the job. Maybe a CSV parser would be better suited? It appears your multiline data sample uses a quoting character in the entry that contains newlines, that is something a CSV parser can handle - and it will also handle cases where bars occur in a quoted field, something that this regex can't do.