正则表达式拆分并合并为单个记录

Question

In my C# application I'm using the below Regex to split the string ([A-Z0-9]{20}\d{0}). But it is splitting the ErrorCode and ErrorMsg as two different records but I need ErrorCode and ErrorMgs in the Single Array record. For Example: Current Logic:

[0] 05300030000GN0030018

[1 Field is required.

But I need like below one [0] 05300030000GN0030018Field is required.

Current Implementation:

Expected output

Answer 1

Assuming the msg is never empty and \d{0} was used to fail any match if the next char after [A-Z0-9]{20} is a digit, you can use

var result = Regex.Matches(input, @"\b[A-Z0-9]{20}\D.*?(?=\b[A-Z0-9]{20}\D|\z)", RegexOptions.Singleline)
            .Cast<Match>()
            .Select(x => x.Value)
            .ToList();

See the regex demo . Note that in case msg can be empty you need to use a (?!\d) lookahead instead of \D , @"\b[A-Z0-9]{20}(?.\d)?*?(?=\b[A-Z0-9]{20}(?!\d)|\z)" .

Details :

• \b - word boundary (need to make sure the char limit is fine)
• [A-Z0-9]{20} - twenty uppercase ASCII letters or digits
• \D - a non-digit char
• .*? - any zero or more chars as few as possible
• (?=\b[A-Z0-9]{20}\D|\z) - a positive lookahead that requires a word boundary, twenty uppercase ASCII letters or digits and a non-digit or end of string immediately to the right of the current location.