Parse a parameter inside URL using C#

Question

Let's say that I have url like http://google.com/index.php?first=asd&second=mnb&third=lkj

How can I get second value (mnb) using c#?

Answer 1

You can use ParseQueryString method from System.Web.HttpUtility class.

Uri targetUri = new Uri("http://google.com/index.php?first=asd&second=mnb&third=lkj");
string first= HttpUtility.ParseQueryString(targetUri.Query).Get("first");
string second= HttpUtility.ParseQueryString(targetUri.Query).Get("second");

Find more here : https://msdn.microsoft.com/en-us/library/ms150046.aspx

Answer 2

For simple string parsing you can use an extension method:

using System.Text.RegularExpressions;

public class Test
{
    public static void Main()
    {
        var value = "url".Between("second=", "&third");
    }
}

public static class Ext
{
    static string Between(this string source, string left, string right)
    {
        return Regex.Match(
                source,
                string.Format("{0}(.*){1}", left, right))
            .Groups[1].Value;
    }
}

However, approaches with URL parsing suggested in comments are almost certain better.

Source: Get string between two strings in a string

Answer 3

Try this:

String URL = "http://google.com/index.php?first=asd&second=mnb&third=lkj";

UriBuilder UrlThing = new UriBuilder(URL);

System.Collections.Specialized.NameValueCollection Args =  HttpUtility.ParseQueryString(UrlThing.Query);

String Second = Args["Second"];