WinRT and WinPRT share the same core, so it makes a lot of sense to optimize your applications for maximum codeshare. I give an overview of the key similarities and differences of the platforms. I share best practices of some common application scenarios.

1. Architecting applications
for WinRT and WinPRT

2. About the the presenter
• Karl Ots, Technical Consultant at Symbio
• Windows Phone 8 and Windows 8 trainer
• Windows Azure Insider
• Co-founder of Young Developers Finland
• Microsoft Student Partner
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3. What we’ll cover
• What shared core means and what it doesn’t
• UX differences
• Porting vs maximum reuse
• Best practices of common scenarios
• Demos
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4. Shared core

5. Shared WinRT Core
Networking
Proximity
Sensors
Location
File System
Core app
model
Threading
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6. Windows 8 Platform
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7. Some definitions
• CLR – common language runtime
• BCL – base class library
• FCL – framework class library
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8. Windows 8 app model
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9. WP8 MANAGED app model
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10. WP8 app model
Native app model Legacy app model
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11. Windows Phone Runtime
•Phone-specific additions to Windows Runtime include
• Speech synthesis and recognition
• Windows.Phone.PersonalInformation
• LockScreen and LockScreenManager
• More…
Full WinRT (around
11,000 members)
Subset adopted for New for Windows
Windows Phone Phone Runtime
Runtime (around (around 600
2,800 members) members)
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12. Targeting maximum reuse

13. Strategies for targeting both platforms
• Use Model-View-ViewModel
• Share portable .NET code in Portable Class Library
• Use common Windows Runtime API (Add as Link)
• Use Windows Runtime Components for language
interoperability
• Use #if conditionals for small code differences
• Use extension methods to bridge implementation
differences
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14. Cross-platform app architecture with PLC
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15. Régis
Laurent
DEMO Director of Operations,
Global Knowledge
Competencies include:
PixPresenter Gold Learning
Silver System Management

16. What’s portable in PixPresenter?
Platform-specific
Portable /shareable
Platform-specific
Windows Phone app Windows Store app
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17. “Add as Link”
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18. Régis
Laurent
DEMO Director of Operations,
Global Knowledge
Competencies include:
Add as Link Gold Learning
Silver System Management

19. Small code differences
Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
double _accelX = args.Reading.AccelerationX;
double _accelY = args.Reading.AccelerationY;
// Update ellipse location
});
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
double _accelX = args.Reading.AccelerationX;
double _accelY = args.Reading.AccelerationY;
//Update ellipse location
});
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20. #if conditional blocks
Threading
#if NETFX_CORE
Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () => {
#else
Deployment.Current.Dispatcher.BeginInvoke(() => {
#endif
double _accelX = args.Reading.AccelerationX;
double _accelY = args.Reading.AccelerationY;
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21. HttpWebResponse and HttpWebRequest
var request = (HttpWebRequest)WebRequest.Create(autoCompleteUri);
HttpWebResponse response = (HttpWebResponse)await request.GetResponseAsync();
// retrieve data using StreamReader
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22. HttpWebResponse and HttpWebRequest
var request = (HttpWebRequest)WebRequest.Create(autoCompleteUri);
request.BeginGetResponse(new AsyncCallback(AutoCompleteCallback), request);
}
private void AutoCompleteCallback(IAsyncResult callback)
{
HttpWebRequest request = (HttpWebRequest)callback.AsyncState;
HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(callback);
// retrieve data using StreamReader
}
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23. Extension Methods
public static Task<HttpWebResponse> GetResponseAsync(this HttpWebRequest request)
{
var taskComplete = new TaskCompletionSource<HttpWebResponse>();
request.BeginGetResponse(asyncResponse =>
{
HttpWebRequest responseRequest =
(HttpWebRequest)asyncResponse.AsyncState;
HttpWebResponse someResponse =
(HttpWebResponse)responseRequest.EndGetResponse(asyncResponse);
taskComplete.TrySetResult(someResponse);
}, request);
return taskComplete.Task;
}
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24. HttpWebResponse and HttpWebRequest
#if WINDOWS_PHONE
using MyExtensionClass
#endif
var request = (HttpWebRequest)WebRequest.Create(autoCompleteUri);
HttpWebResponse response = (HttpWebResponse)await request.GetResponseAsync();
// retrieve data using StreamReader
Use carefully – performance in ABYSMAL
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25. Best practices

26. Most common reasons to fail certification
• Windows Phone: failure to check for (light)
themes
• Windows 8: no privacy policy
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27. Do NOT share XAML. Just don’t.

28. Different Form Factors Require Different UX
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29. Translating UX
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30. Translating UX – Details View
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31. Case
Moomin video store

32. Case: Moomin video store
• Windows 8 client ported to Windows Phone 8
• Core Models and ViewModels unchanged
• Azure backend for distributing media (Win8) and
keeping track of in-app purchases receipts
• Different Store, different in-app purchases
• WP: download limitations
• Different media players
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33. Thank you!
Time for QA and a quick raffle!
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