Dynamically Loading Silverlight Video Players using MEF

// Copyright (c) 2010
// by OpenLight Group
// http://openlightgroup.net/
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated 
// documentation files (the "Software"), to deal in the Software without restriction, including without limitation 
// the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and 
// to permit persons to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions 
// of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED 
// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
//
// CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
// DEALINGS IN THE SOFTWARE.

using System;
using System.Collections.Generic;
using System.Linq;
using System.ServiceModel;
using System.Collections.ObjectModel;
using SkinableVideoPlayer.wsSkinableVideoPlayer;
using Microsoft.VisualBasic;

namespace SkinableVideoPlayer
{
    public class SilverlightXaps
    {
        #region GetXaps
        public static void GetXaps(EventHandler<GetXapsCompletedEventArgs> eh)
        {
            // Set up web service call
            WebServiceSoapClient objWebServiceSoapClient =
              new WebServiceSoapClient();

            // Format the base address of the website that launched the Silverlight Application
            string BaseWebAddress = string.Format(@"{0}/{1}", GetBaseAddress(), @"WebService/WebService.asmx");
            EndpointAddress MyEndpointAddress = new
                EndpointAddress(BaseWebAddress);       

            // Set that address
            objWebServiceSoapClient.Endpoint.Address = MyEndpointAddress;

            objWebServiceSoapClient.GetXapsCompleted += eh;
            objWebServiceSoapClient.GetXapsAsync();
        }      
        #endregion

        #region GetBaseAddress
        private static string GetBaseAddress()
        {
            // Get the web address of the .xap that launched this application
            string strBaseWebAddress = App.Current.Host.Source.AbsoluteUri;
            // Find the position of the ClientBin directory
            int PositionOfClientBin =
                App.Current.Host.Source.AbsoluteUri.ToLower().IndexOf(@"/clientbin");
            // Strip off everything after the ClientBin directory
            strBaseWebAddress = Strings.Left(strBaseWebAddress, PositionOfClientBin);
            // Return the base address
            return strBaseWebAddress;
        }
        #endregion
    }
}