Question

I am writing a program that needs to search a LARGE text document for a large collection of words. The words are all file names, with underscores in them (eg, this_file_name). I know how to open and iterate through a text document, but I’m curious whether I should use Regex to search for these names, and if so, what kind of reg. ex. sequence should I use? I’ve tried

 Regex r = new Regex('?this\_file\_name'); 

but I get an invalid argument error every time.

Answer 1

It would be helpful to see a sample of the source text. but maybe this helps

var doc = @'asdfsdafjkj;lkjsadf asddf jsadf asdfj;lksdajf sdafjkl;sjdfaas  sadfj;lksadf sadf jsdaf jf sda sdaf asdf sad jasfd sdf sadf sadf sdajlk;asdf this_file_name asdfsadf asdf asdf asdf  asdf sadf asdfj asdf sdaf sadfsadf sadf asdf this_file_name asdf asdf ';  var reg = new Regex('this_file_name', RegexOptions.IgnoreCase | RegexOptions.Multiline); var matches = reg.Matches(doc);