I have a text like this :
string text = "Lorem ipsum dolor sit [1] amet, [3] consectetuer adipiscing [5/4/9] elit
Ut odio. Nam sed est. Nam a risus et est[55/12/33/4] iaculis";
I want to get a list of string with all [digit] or all [digit/digit/...] present in my text.
For example:
{"[1]","[3]","[5/4/9]","[55/12/33/4]"}
for the text above.
How can I do that with regex?
StringCollection resultList = new StringCollection();
Regex regexObj = new Regex(@"\[[\d/]*\]");
Match matchResult = regexObj.Match(subjectString);
while (matchResult.Success) {
resultList.Add(matchResult.Value);
matchResult = matchResult.NextMatch();
}
Explanation:
\[ # match a literal [
[\d/]* # match any number of digits or /
\] # match a literal ]
Matches() instead of Match()?
Get the matches as a collection, and get the value from each match into an array like this:
string[] items =
Regex.Matches(text, @"\[([\d/]+)\]")
.Cast<Match>()
.Select(m => m.Groups[0].Value)
.ToArray();
For simplicity the pattern matches anything that is digits and slashes between brackets, so it would also match something like [//42/]. If you need it to match only the exact occurances, you would need the more complicated pattern @"\[(\d+(?:/\d+)*)\]".
Here is a version that works with framework 2.0.
List<string> items = new List<string>();
foreach (Match match in Regex.Matches(text, @"\[([\d/]+)\]")) {
items.Add(m.Groups[0].Value);
}
Matches method to get all matches in a single call, then I use the Select method to get the value out from each of the matches.using System.Linq; at the top of the file for this to work.Assuming your input string is stored in a variable input:
Regex regex = new Regex("\\[(\\d/?)*\\]");
MatchCollection matches = regex.Matches(input);
MatchCollection matches holds all of the matches and can be displayed like this:
for (int i = 0; i < matches.Count; i++)
Console.WriteLine(matches[i].Value);
The above loop outputs:
[1]
[3]
[5/4/9]
[55/12/33/4]
string regex = @"(\[[\d/]*?\])";
