如何在C＃中通过正则表达式匹配由给定子字符串构造的字符串

Question

what should I do to match a string constructed by substrings "CC" "LC" "SW" "RP" "WP" "DT" "LO" "CR" "RC" by regular expression in c#.for example: the input string is "D:(A;;CCLCRPRC;;;AU)(A;;CCLCRPRC;;;IU)(A;;CCLCRPRC;;;SU) (A;;CCLCRPWPRC;;;SY)(A;;KA;;;BA)S:(AU;FA;KA;;;WD)(AU;OIIOFA;GA;;;WD)"* and how to match the substring * (A;;CCLCRPRC;;;AU) in it.

thanks,regards

Answer 1

You didn't specify anything about the text surrounding the 2 character substrings (the As and the semicolons), so to be flexible, here's a regex that pulls out all strings that are surrounded by brackets, start with anything, end with anything, and contains one or more of the substrings you specified:

var resultList = new List<string>();
Regex regexObj = new Regex(@"(\(.*?(CC|LC|SW|RP|WP|DT|LO|CR|RC)+.*?\))", RegexOptions.Multiline);
Match matchResult = regexObj.Match(subjectString);
while (matchResult.Success) 
{
    resultList.Add(matchResult.Value);
    matchResult = matchResult.NextMatch();
} 

When run on your example above, the following are extracted:

(A;;CCLCRPRC;;;AU)
(A;;CCLCRPRC;;;IU)
(A;;CCLCRPRC;;;SU)
(A;;CCLCRPWPRC;;;SY)

Answer 2

如果要匹配精确的字符串，则只需使用String.IndexOf方法即可。

Answer 3

或者您可以使用String.Contains方法来查找字符串是否为主字符串的一部分