C#中的正则表达式查找包含[|的所有foldernames ]

Question

以下正则表达式应该在C#中处理:

我想找到包含'['或']'的所有字符串.

它应该匹配以下字符串;

...an folder ] ...
...and ] another...
...[so] this is...
...and [ a few more]...
...lorem ipsum[...

以下代码不会编译:

string pattern ="\.*(\[|\])\.*";
List<string> directoriesMatchingPattern=  Util.GetSubFoldersMatching(attachmentDirectory,pattern);

并实施:

     public static List<string> GetSubFoldersMatching(string attachmentDirectory, string pattern)
        {
            List<string> matching = new List<string>();
            foreach (string directoryName in Directory.GetDirectories(attachmentDirectory))
            {
                Match match = Regex.Match(directoryName, pattern, RegexOptions.IgnoreCase);
                if (match.Success)
                {
                    matching.Add(directoryName);
                }
                else
                {
                    matching.AddRange(GetSubFoldersMatching(directoryName,pattern));
                }
            }
            return matching;
        }

Visual Studio显示的错误是:

Error   Unrecognized escape sequence

如何解决这个问题,或者如何正确地逃避这些问题呢？谷歌搜索没有任何帮助.

Answer 1

转义模式字符串:

string pattern ="\\.*(\\[|\\])\\.*";

要么:

string pattern = @"\.*(\[|\])\.*";

有关字符串和字符串转义序列的更深入研究,请参见MSDN.