Question

I can’t figure out how to extract specific numbers with a specific match from a string.

Example:

string myString = "blah blah **[10]** blah **[20]** and some more blah **[30]**";
Regex myIDsReg = new Regex(@"\*\*\[(\d+)\]\*\*");

Apparently the regex is sound.

Match myMatch = myIDsReg.Match(myString);

Yields “**[10]**” but nothing else.

I can’t figure out how to get an array with the following values: 10, 20, 30

Answer 1

I would do this

string myString = "blah blah **[10]** blah **[20]** and some more blah **[30]**";
Regex myIDsReg = new Regex(@"\*\*\[(\d+)\]\*\*");
string[] regexResult = (from Match match in myIDsReg.Matches(myString) select match.Groups[1].Value).ToArray();

You can select which output you want as well

List<string> regexResult = (from Match match in myIDsReg.Matches(myString) select match.Groups[1].Value).ToList();

or

IEnumerable<string> regexResult = (from Match match in myIDsReg.Matches(myString) select match.Groups[1].Value);

I’d prefer one of the two latter