Question

I am practicing regex with C#. This is my code:

string test =
    "this is whole new line, with different parameters 10.1.2.1, 10.1.5.1, 10.1.3.1";
string a = Regex.Match(test, "10.[0-9].[0-9]+.[0-9]+").Value;
Console.WriteLine(a);

The result is 10.1.2.1. It finds the first match and that’s it.

How can I perform this function recursively ? Do I need to add some extra code or is there a regex class which has this as a built in function (which I would prefer)?

Answer 1

You are explicitly asking for only one match, using the Match method. You should use Matches instead, and iterate over the result:

string test = "this is whole new line, with different parameters 10.1.2.1, 10.1.5.1, 10.1.3.1";
foreach(Match result in Regex.Matches(test, "10.[0-9].[0-9]+.[0-9]+"))
{
    Console.WriteLine(result);  
}

That code will print the following:

10.1.2.1
10.1.5.1
10.1.3.1