Calling a service relative to the Silverlight XAP (improved)

In my previous post I showed a way to call a service defined with a full path, as created by the designer, relative to that of the location of your XAP, by means of an extension to a user control. I developed that during a training and while blogging it I alreadly realized that there was room for improvement. And here it is:

using System;
using System.ServiceModel;
using System.ServiceModel.Description;
using System.Windows;

namespace LocalJoost.Utilities.Silverlight
{
  public static class ServiceEndpointExtension
  {
    public static void MakeRelative(
      this ServiceEndpoint endpoint)
    {
      var clientbinLocation = 
        Application.Current.Host.Source.ToString().Substring(0,
        Application.Current.Host.Source.ToString().LastIndexOf("/"));
      var rootLocation = 
        clientbinLocation.Substring(0, 
        clientbinLocation.LastIndexOf("/"));
      endpoint.Address = new EndpointAddress(
        new Uri(string.Concat(rootLocation, 
          endpoint.Address.Uri.AbsolutePath)));
    }
  }
}

In stead of extending the user control I now extend the ServiceEndpoint. If you now want to call a service that is sitting in the root of your web application that is hosting you can call it like this:

var client = new CloudMapperDataServiceClient();
client.Endpoint.Address.MakeRelative();

Substitute "CloudMapperDataServiceClient" by your own client proxy class and you are go for launch (Sorry, currently listening to wechoosethemoon.org ;-)