Announcing the Windows Phone 7 Release, WP7 Silverlight Toolkit and XNA 4.0!

The following list shows changes you must make to the WmAppManifest.xml file:

• In the <App> element, change the value of the Genre attribute from NormalApp to apps.normal.
• In the <App> element, change the value of the RuntimeType attribute from SilverLight to Silverlight.
• Remove the PlaceHolderString attribute from the <DefaultTask> element.
• Add the NavigationPage attribute to the <defaulttask> element and set it to the main page of your app. For example: <DefaultTask … NavigationPage=”MainPage.xaml”/>.

The following list shows changes you must make to the App.xaml file:

Note: The recommended option for updating this file is to obtain a copy of the most recent version. Using your old file, copy the information specific to your application (such as, resources) to the new file.

• Remove the <Application.RootVisual> element
• Add the <Application.ApplicationLifetimeObjects> element. For example:

  <Application.ApplicationLifetimeObjects>
        <!–Required object that handles lifetime events for the application–>
        <shell:PhoneApplicationService Launching="Application_Launching" Closing="Application_Closing"
             Activated="Application_Activated" Deactivated="Application_Deactivated"/>
  </Application.ApplicationLifetimeObjects>
   

The following list shows changes you must make to the app.xaml.cs file:

• If you have added the <Application.ApplicationLifetimeObjects> element to the App.xaml file then you will need to add these event handlers to the app.xaml.cs file:

  private void Application_Launching(object sender, LaunchingEventArgs e)
  {
  }

  private void Application_Activated(object sender, ActivatedEventArgs e)
  {
  }

  private void Application_Deactivated(object sender, DeactivatedEventArgs e)
  {
  }

  private void Application_Closing(object sender, ClosingEventArgs e)
  {
  }

• Add the following initialization code to your app.xaml.cs file and call InitializePhoneApplication() in the app constructor:

  // Easy access to the root frame
  public PhoneApplicationFrame RootFrame { get; private set; }

  // Avoid double-initialization-
  private bool phoneApplicationInitialized = false;

  // Do not add any additional code to this method
  private void InitializePhoneApplication()
  {
  if (phoneApplicationInitialized)
  return;

  // Create the frame but do not set it as RootVisual yet; this allows the splash
  // screen to remain active until the application is ready to render.
  RootFrame = new PhoneApplicationFrame();
  RootFrame.Navigated += CompleteInitializePhoneApplication;

  // Handle navigation failures
  RootFrame.NavigationFailed += RootFrame_NavigationFailed;

  // Ensure you do not initialize again
  phoneApplicationInitialized = true;
  }

  // Do not add any additional code to this method
  private void CompleteInitializePhoneApplication(object sender, NavigationEventArgs e)
  {
  // Set the root visual to allow the application to render
  if (RootVisual != RootFrame)
  RootVisual = RootFrame;

  // Remove this handler since it is no longer needed
  RootFrame.Navigated -= CompleteInitializePhoneApplication;
  }

  // Code to execute if a navigation fails
  void RootFrame_NavigationFailed(object sender, NavigationFailedEventArgs e)
  {
  if (System.Diagnostics.Debugger.IsAttached)
  {
  // A navigation has failed; break into the debugger
  System.Diagnostics.Debugger.Break();
  }
  }

  #endregion

• utf-8
• utf-16
• utf-16LE
• utf-16BE
• ISO-8859-1

Use of an unsupported encoding value in an application will result in an ArgumentException exception. You must modify existing applications to remove references to unsupported encoding values. XML data should specify only supported encodings. For example:
<?xml version="1.0" encoding= “utf-8”?>.

• Guide.ShowGamerCard(PlayerIndex player, Gamer gamer)
• Gamer.BeginGetFromGamertag(string gamertag, AsyncCallback callback, object asyncState)
• Gamer.GetFromGamertag(string gamertag)
• Gamer.GetProfile()
• Gamer.BeginGetProfile(AsyncCallback callback, object asyncState

The following code example illustrates how to use the GetPictureFromToken method to retrieve a photo. For more information see, How to: Create a Photo Extras Application for Windows Phone:

using System.Windows.Media.Imaging;
using Microsoft.Phone;
using System.IO;
using Microsoft.Xna.Framework.Media;
using System.Windows.Navigation;
.
.
.
protected override void OnNavigatedTo(NavigationEventArgs e)
{
//Gets a dictionary of query string keys and values
IDictionary<string, string> queryStrings = this.NavigationContext.QueryString;

//This code ensures that there is at least one key in the query string, and checks if the "token" key is present.
if (queryStrings.ContainsKey("token"))
{

//This code retrieves the picture from the local Zune Media Database using the token passed to the application.
MediaLibrary library = new MediaLibrary();
Picture picture = library.GetPictureFromToken(queryStrings["token"]);

//Creates WriteableBitmap object and adds to the Image control Source property.
BitmapImage bitmap = new BitmapImage();
bitmap.SetSource(picture.GetImage());
WriteableBitmap picLibraryImage = new WriteableBitmap(bitmap);
retrievePic.Source = picLibraryImage;
}

}

1. Add an image file with the name SplashScreenImage.jpg to the project.
2. In Solution Explorer, right-click the file and select Properties.
3. In the Properties pane, set Build Action to Content.
4. Rebuild the application and redeploy it.