Question

I would like to know why, with the following input, the function IsMatches returns false.
What is the problem with my pattern. Thanks a lot.

var input = @"/****** Object:  Table [etc_abc]    Script Date: 11/27/2012 13:24:26 ******/";

    public bool IsMatched(string input)
    {
        var match = Regex.Match(input, @"/\*+\sObject:\s+Table\s+[\[[a-zA-Z0-9_\\]+\]\.]??(\[[a-zA-Z0-9_\\]+\])", RegexOptions.Compiled | RegexOptions.IgnoreCase);
        return match.Success;
    }

Answer 1

I don’t know about C# regex in particular, but this part looks suspicious: [\[[a-zA-Z0-9_\\]+\]\.]??.

You don’t want to treat this as a character class, you probably want to treat it as a group, so use simple parentheses instead of square brackets: (\[[a-zA-Z0-9_\\]+\]\.)??

So this might work for you: @"/\*+\sObject:\s+Table\s+(\[[a-zA-Z0-9_\\]+\]\.)??(\[[a-zA-Z0-9_\\]+\])"