using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?:\b[\s]?|[^x])([\d]{1}[\d]{2})(?:[^pi]|[\s]?\b)";
string input = @"This is (321) an example.
(321) also
including (321) //basically not possible, but can't hurt.
this (321) has another group with a p: 122p
this (321) has another group with a I: 123i
this x235 should be ignored cause (123) is what i want to match.
(123) is what i want, not x111 or 125p or 999i
in this 111 case there is no solution 555
101 202.something
";
foreach (Match m in Regex.Matches(input, pattern))
{
Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index);
}
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx