This document discusses Windows 8 Metro apps and XAML. It provides an overview of key aspects of developing apps for Windows 8 including the Metro style, touch optimization, asynchronous programming, and leveraging existing skills with XAML and .NET. Metro apps offer opportunities to build immersive, fast and fluid experiences across devices with a global reach.

1. Local Touch – Global Reach
Windows 8 Metro Apps with XAML
Samidip Basu
Manager| Columbus ADI Practice
Solutions Lead | MSFT Mobility
Email: Samidip.Basu@us.sogeti.com
Twitter: @samidip
Info: http://samidipbasu.info
Blog: http://samidipbasu.com
Sogeti USA
8425 Pulsar Place, Suite 300 | Columbus, OH 43240.
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www.us.sogeti.com

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3. Central Ohio Windows Phone User Group
http://cowpug.org
http://meetup.com/cowpug
@cowpug
3rd Monday @ TechColumbus

4. http://www.m3conf.com/
@m3conf

5. SilverlightShow (www.silverlightshow.net) – online
portal for everything Silverlight, XAML and Windows
Phone, 10K+ members.
* daily news * tutorials
* exclusive articles * forums
* free webinars * events
* ebooks * newsletters
CompletIT (www.completit.com) – Silverlight and
Windows Phone trainings, consultations and
development company, founder of SilverlightShow.
* Individual and group, on-site and online trainings
* Standard and custom course schedules
* Trainings by Silverlight MVP, MCT

7. Well Hello .. Windows 8!!
- One OS to rule them all
- No compromise
- Variety of form factors
- Touch, mouse & keyboard coexist
- Immersive Apps

8. Metro love ..
http://buildwindows.com
http://dev.windows.com

9. Few more details ..
- Fast & Fluid
- Metro vs Retro
- Metro on top of Desktop
- Touch first : Get used to shortcuts
- Immersive with adaptive layout
- Chromelessness
- App Store for Metro apps
- Local Certification Verifier
- Sandboxed
- Closer App-OS integration with WinRT API
- App Contracts (Source/Target/Picker etc.) & Charms
- Windows Phone style Live Tiles
- MSFT Push Notification Service
- Did I mention XBOX LIVE!!

10. All your skills carry forward..

11. Ahem..

12. WinRT, Desktop world etc...
- WinRT = Fixed set of API for Apps to reach into core Windows features/devices
- Common runtime that connects to System Services with diverse views
- APIs implemented in C++ .. lean performance
- Part of OS
- Supports your choice of UI & language
- HTML5/JavaScript/CSS
- XAML with C#, VB, C++
- Remember Fast & Fluid – any ops > 50ms (read most) = Await/Async
- Win32 & .NET CLR all live
- Metro IE10 = plug-in free
- Regular IE supports Silverlight, Flash etc.
- Fixed (careful) steps to migrate Windows Phone apps to Win8 Metro apps

13. Metro App Controls
Courtesy @john_papa

14. Oh boy .. Asynchrony?
- Not the same as Parallelism
- Not necessarily multi-threading, but interweaving
- APM Pattern:
IAsyncResult result = BeginFoo(new AsyncCallBack(EndCallBackMethod), resultHandle);
…
private EndCallBackMethod (IAsyncResult result)
{
// EndFoo & stuff
}
- EAP Pattern:
Foo.DownloadSomethingCompleted += ExecutionEndEventHandler();
Foo.DownloadSomething();
Private ExecutionEndEventHandler()
{
Dispatcher.BeginInvoked ( () =>
{
// Grab results & Update UI.
});
}
- Hmmm … How bout this? No more callbacks!
private async Method ()
{
var results = await DoAsync ();
// UI Binding.
}

15. Opportunity .. Windows Re-Imagined!

16. Local Touch – Global Reach
Questions?
Thank you !!
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