using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @/
USERID,(?:[^,]+,){8}(\w+)
/;
string input = @"May 29 14:51:56 deast01pano.xxxxx.com 1,2018/05/29 14:51:56,012501001022,6553964590112973819,0x8000000000000000,USERID,login,2049,2018/05/29 14:51:50,0,0,0,0,vsys1,dwest01fw,1,vsys1,10.142.10.172,xxxxx\pulse,deast01fwua.xxxxx.com,0,1,2700,0,0,agent,,0,0,,2018/05/29 14:51:47,1,0,0,0x0,xxxxx\pulse";
RegexOptions options = RegexOptions.Multiline;
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