using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?<=\bGASTEC).*(?:NO\s|,\s)(?<id>\b[1-9][ABHLMT][ABLMT]{0,1}|[1-9][0-9]{1,2}\s?[^-Pm ][BDLPT]{0,2})(?:\s|,).*$";
string input = @"GASTEC TUBE, BENZENE 1-10 PPM, 121L, //MUST MATCH
121L TUBE, BENZENE 1-10 PPM, GASTEC, //MUST MATCH <<<<-----
GASTEC TUBE FOR H2S, 0.5-15 PPM, //NO MATCH
GASTEC TUBE FOR CO, 1-25 PPM,//NO MATCH
KITAGAWA 128SD//NO MATCH
GASTEC TUBE FOR ETHYL ALCOHOL NO 112L , 100-2000 PPM,//MUST MATCH
GASTEC TUBES NO 111 METHYL ALCOHOL QC NO: 80777 MEASURING RANGE: 0.02-4.5% SCALE RANGE: 0.02-1.5%//MUST MATCH
GASTEC TUBES NO 4H BENZENE QC NO: 90985 MEASURING RANGE: 0.2-66 PPM SCALE RANGE: 0.2-20PPM//MUST MATCH
MSA TUBES NO 111 METHYL ALCOHOL QC NO: 80777 MEASURING RANGE: 0.02-4.5 SCALE RANGE: 0.02-1.5 (2)//NO MATCH
GASTEC TUBES NO 121SP BENZENE QC NO: 90985 MEASURING RANGE: 0.2-66 PPM SCALE RANGE: 0.2-20PPM (1)//MUST MATCH
GASTEC TUBE FOR BENZENE (RANGE 0.1-10 PPM) , 5 TEST S EACH PACKET, //NO MATCH
DRAGER TUBES NO 121SP BENZENE QC NO: 90985 MEASURING RANGE: 0.2-66 PPM SCALE RANGE: 0.2-20PPM 1 //NO MATCH
TOXIC GAS DETECTION TUBES, GASTEC General Deck Stores, Man: IMPA //NO MATCH
";
RegexOptions options = RegexOptions.Multiline | 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