using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"\b(?:north|south)(?:\h*(?:east|west))?\b|\b(?:east|west|[NS][WE]?|[EW])\b";
string input = @"SHOULD MATCH:
405 W 1st Street South west #910
North, South, West, East, North East, North West, South East, South West
N, S, NW, NE, SE, SW, E, W.
northeast northwest southeast southwest
PARTIAL MATCH:
north-west north-east south-west south-east
SHOULD NOT MATCH:
westnorth westsouth eastnorth eastsouth
wn ws en es
";
RegexOptions options = RegexOptions.IgnoreCase;
foreach (Match m in Regex.Matches(input, pattern, options))
{
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