在 .NET 中使用正则表达式从字符串中提取标记

Question

I'm curious if this is even possible with Regex. I want to extract tokens from a string similar to:

Select a [COLOR] and a [SIZE].

Ok, easy enough - I can use (\[[AZ]+\])

However, I want to also extract the text between the tokens. Basically, I want the matched groups for the above to be:

"Select a "
"[COLOR]"
" and a "
"[SIZE]"
"."

What's the best approach for this? If there's a way to do this with RegEx, that would be great. Otherwise, I'm guessing I have to extract the tokens, then manually loop through the MatchCollection and parse out the substrings based on the indexes and lengths of each Match. Please note I need to preserve the order of the strings and tokens. Is there a better algorithm to do this sort of string parsing?

Answer 1

Use Regex.Split(s, @"(\[[AZ]+\])") - it should give you the exact array you're after. Split takes captured groups and converts them to tokens in the result array.

Answer 2

Here is a method without using regular expressions ( Regex ) that uses String.Split , but you lose the delimiters.

        string s = "Select a [COLOR] and a [SIZE].";

        string[] sParts = s.Split('[', ']');

        foreach (string sPart in sParts)
        {
            Debug.WriteLine(sPart);
        }

        // Select a 
        // COLOR
        //  and a 
        // SIZE
        // .