C# Regex Match Array

Question

so this is my first real time using C# and I am having some troubles using regex. So I have a string like this:

string str = "test=CAPTURE1; test2=CAPTURE2; ......."

I am capturing everything between = and ; so:

var matches = Regex.Matches(str, "=([^;]*);/g");

However, I am not able to get the results out of an array:

string str2 = matches[0].Value;

I am not sure what I am doing wrong. Any help is appreciated!

EDIT: So here is what I am trying to implement this to (using @Jason Evans code):

string connection = "Server=localhost;Database=dbTest;User Id=hello;Password=world;";            
var matches = Regex.Matches(connection, "(?<Key>[^=]*)=(?<Value>[^;]*)");

string server = matches[0].Groups["Data"].Value;
string db = matches[1].Groups["Data"].Value;
string un = matches[2].Groups["Data"].Value;
string pw = matches[3].Groups["Data"].Value;           

MsSqlConnectionParameters param = (MsSqlConnectionParameters)e.ConnectionParameters;
param.ServerName = server;
param.DatabaseName = db;
param.UserName = un;
param.Password = pw;

This is still not working for some reason, even though I believe this is right.

EDIT2: What's weird is that this works (using same data)...I'm stumped:

string[] test = { "localhost", "dbTest", "hello", "world" };

MsSqlConnectionParameters param = (MsSqlConnectionParameters)e.ConnectionParameters;

param.ServerName = test[0];
param.DatabaseName = test[1];
param.UserName = test[2];
param.Password = test[3];

The global flag is implied by the Regex.Matches() method. See here for using global flags though, it's not done like JS: msdn.microsoft.com/en-us/library/b49yw9s8%28v=vs.110%29.aspx — Pluto
– Pluto, Commented Oct 16, 2015 at 20:51
I tried you example removing the /g at the end of your regex and it worked as expected. What are you using that for? — Luiso
– Luiso, Commented Oct 16, 2015 at 20:59
For more info on getting the results of matches see stackoverflow.com/questions/27444640/… — AdrianHHH
– AdrianHHH, Commented Oct 19, 2015 at 8:03

Jason Evans · Accepted Answer · 2015-10-16 20:48:36Z

3

Try the following:

namespace ConsoleApplication1
{
    using System.Text.RegularExpressions;

    public class Program
    {
        static void Main(string[] args)
        {
            string str = "test=CAPTURE1; test2=CAPTURE2";

            var matches = Regex.Matches(str, "(?<Key>[^=]*)=(?<Value>[^;]*)");

            string str2 = matches[0].Groups["Key"].Value;
            string str3 = matches[0].Groups["Value"].Value;
        }
    }
}

I use a named capture group (?<Key>) and (?<Data>) to catch the text before and after the '='. That way you can grab the individual part of the string.

answered Oct 16, 2015 at 20:48

Jason Evans

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1 Comment

Hard Tacos Over a year ago

Yeah, I think this is right - but I am still having issues passing the values to what I need. I have updated my post to include my implementation.

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