CODEWITHSUNDEEP
c#regex
Rod
Rod

Reputation: 15475

Why am I not getting Regex group values

Got some great help from this post answer a while back here

Now I'm trying take that and capture a couple patterns in my multi-line string but not working. Any hints for me?

Here's a .net fiddle I'm playing with

    desired result:
    //these can be letters
      
    1: 3333  
    2: 1111

code:

using System;
using System.Text.RegularExpressions;

public class Program
{
    public static void Main()
    {
        var item = " john smith (ABCDEFG) <[email protected]>\n" + 
            "target1 = 3333, j\n" + 
            "target2 1111, ";
        String[] patternArr = {"(?:\\s*)", 
                               "(?<target1>target1 = (\\w+)])", // capture the first target
                                "(?:\\s*)", 
                               "(?<target2>target2 (\\w+))", // captures the second target
 };
        var pattern = String.Join("", patternArr);
        var m = Regex.Match(item, pattern);
        if (m.Success)
        {
            Console.WriteLine("target1: {0}", m.Groups["target1"]);
            Console.WriteLine("target2: {0}", m.Groups["target2"]);
        }
    }
}

Upvotes: 2

Views: 66

Answers (1)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 627469

You can use

var pattern = @"target1 = (?<target1>\w+).*\ntarget2\s+(?<target2>\w+)";

See the regex demo. Regex details:

  • target1 = - a literal string
  • (?<target1>\w+) - Group "target1": one or more word chars
  • .* - the rest of the line
  • \n - the newline char
  • target2 - literal string
  • \s+ - one or more whitespaces
  • (?<target2>\w+) - Group "target2": one or more word chars

See the C# demo:

using System;
using System.Text.RegularExpressions;
 
public class Program
{
    public static void Main()
    {
        var item = " john smith (ABCDEFG) <[email protected]>\n" + 
            "target1 = 3333, j\n" + 
            "target2 1111, ";
        var pattern = @"target1 = (?<target1>\w+).*\ntarget2\s+(?<target2>\w+)";
        var m = Regex.Match(item, pattern);
        if (m.Success)
        {
            Console.WriteLine("target1: {0}", m.Groups["target1"]);
            Console.WriteLine("target2: {0}", m.Groups["target2"]);
        }
    }
}

Output:

target1: 3333
target2: 1111

Upvotes: 1

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