Question

I have written a console app that reads in a text file full of data.

I had to extract any telephone numbers from it and put them into a results file.

I used several RegEx’s to do this to cover several different formats of telephone numbers i.e. UK, US, international etc.

Here is an example of one I used –

string sPattern = "^\\d{3}-\\d{3}-\\d{4}$";

This would look for telephone numbers in the following format – 123-456-7890

My question being, I now want to write a RegEx that looks for key words as apposed to numbers.

E.g. If I read in a data file I would want it to find key words ‘White’ and ‘Car’.

And then put them into the results file.

Is there a method of doing this?

Answer 1

Try Regex.Matches():

string pattern = "car";
Regex rx = new Regex(pattern, RegexOptions.None);
MatchCollection mc = rx.Matches(inputText);

foreach (Match m in mc)
{
    Console.WriteLine(m.Value);
}