C# remove empty url parameters regex

Question

I am trying to remove empty url type parameters from a string using C#. My code sample is here.

    public static string test ()
    {
        string parameters          


        

Answer 1

You absolutely do not need to roll your own Regex for this, try using HttpUtility.ParseQueryString():

public static string RemoveEmptyUrlParameters(string input)
{
    var results = HttpUtility.ParseQueryString(input);

    Dictionary nonEmpty = new Dictionary();
    foreach(var k in results.AllKeys)
    {
        if(!string.IsNullOrWhiteSpace(results[k]))
        {
            nonEmpty.Add(k, results[k]);
        }
    }

    return string.Join("&", nonEmpty.Select(kvp => $"{kvp.Key}={kvp.Value}"));
}

Fiddle here