using System;

using System.Text.RegularExpressions;

​

//http://www.dotnetforall.com/parsing-log-file-using-regular-expression/

//https://msdn.microsoft.com/zh-tw/library/system.text.regularexpressions.regex(v=vs.110).aspx

public class Program

{

    public static void Main()

    {

​

            string SampleLine = "ERROR 12/6/2016 01:25:15 ---MyModule--- NullReferenceException thrown by MyMethod in MyCLass";

            /*

            Regex pattern = new Regex(@"(?<level>\S+) " +

                @"(?<timestamp>\d{2}/\d{1,2}/\d{4} \d{2}:\d{2}:\d{2}) " +

                @"---(?<category>[^-]+)--- " +

                @"(?<message>.*)");

            */

            Regex pattern = new Regex(@"(?<level>\S+)(?<timestamp>\d{2}/\d{1,2}/\d{4} \d{2}:\d{2}:\d{2}) ---(?<category>[^-]+)--- (?<message>.*)");

            Match match = pattern.Match(SampleLine);

            if(match.Success)

            {

                Console.WriteLine(match.Groups["level"]);

                Console.WriteLine(match.Groups["timestamp"]);

                Console.WriteLine(match.Groups["category"]);

                Console.WriteLine(match.Groups["message"]);

            }

    }

}