Chapter 18: Regex Parsing

Section 18.1: Single match

using System.Text.RegularExpressions;

string pattern = ":(.*?):";

string lookup = "--:text in here:--";

// Instanciate your regex object and pass a pattern to it

Regex rgxLookup = new Regex(pattern, RegexOptions.Singleline, TimeSpan.FromSeconds(1));

//Get the match from your regex-object

Match mLookup = rgxLookup.Match(lookup);

//The group-index 0 always covers the full pattern.

//Matches inside parentheses will be accessed through the index 1 and above. string found = mLookup.Groups[1].Value;

Result:

found = "text in here"

Section 18.2: Multiple matches

using System.Text.RegularExpressions;

List<string> found = new List<string>(); string pattern = ":(.*?):";

string lookup = "--:text in here:--:another one:-:third one:---!123:fourth:";

// Instanciate your regex object and pass a pattern to it

Regex rgxLookup = new Regex(pattern, RegexOptions.Singleline, TimeSpan.FromSeconds(1)); MatchCollection mLookup = rgxLookup.Matches(lookup);

foreach(Match match in mLookup)

{

found.Add(match.Groups[1].Value);

}

Result:

found = new List<string>() { "text in here", "another one", "third one", "fourth" }