Equivalent function to IO.Path.GetFileName for urls?

Question

In .NET 4.0, whats the equivalent function to IO.Path.GetFileName for urls?

Answer 1

You may stick to creating Uri object or if you care about performance use something similar to this one:

    public class UriHelpers
    {
        public static string GetFileNameFromUrl(string url)
        {
            string lastSegment = url.Split('/').Last();

            return lastSegment.Substring(0, lastSegment.IndexOf('?') < 0 ? lastSegment.Length : lastSegment.IndexOf('?'));
        }
    }

Answer 2

You can use Server.MapPath() to map a physical path from a virtual path.

Additionally, there are a number of methods within the HTTPUtility that will help you map various different types of path.

Answer 3

There are many ways, the main being described here
Baqsically exploiting the Uri class, and maybe string tokeniztion if needed.

Answer 4

The Uri class is your friend.

Provides an object representation of a uniform resource identifier (URI) and easy access to the parts of the URI.

IsFile will try to determine if the Uri does indeed point to a file.

Use the Segements property in order to get the file name (it will be the last segment).

Uri uri = new Uri("http://example.com/title/index.htm");
var filename = uri.Segments[uri.Segments.Length - 1];
// filename == "index.htm"