1. 04 | State Management Bill Burrows | UW Faculty Member & VB MVP
Anthony D. Green | Program Manager, Microsoft

2. Module Overview Application Life Cycle Saving/Restoring State
AW State Management

3. Application Life Cycle

4. Application Lifecycle
Running
Not Running
Suspended
Suspending
Resuming
Activated

5. Application Lifecycle
Running
Not Running
Suspended
Suspending
Resuming
Activated
Suspended
When
User switches away from it
Windows enters low-power state
May stay in memory
Resumes very fast
Windows manages – no code required
(unless page is discarded from
navigation path)

6. Application Lifecycle
Running
Not Running
Suspended
Suspending
Resuming
Activated
Terminated (not running)
When
Application is suspended
(and)
Windows needs memory
(or)
Windows wants to save power
Removed from memory
Must be re-activated

7. Application Lifecycle
Big Deal!
Windows notifies your app when it suspends it, but doesn't provide additional notification when it terminates the app.
That means your app must handle the suspended event and use it to save its state and release its exclusive resources and file handles immediately.

8. Application Lifecycle
Running
Not Running
Suspended
Suspending
Resuming
Activated
Use the SuspensionManager

9. Suspending – Time Limited
About 5 seconds!
Save changes in state frequently while app is running to reduce activity when suspension takes place.

10. Types of States
Application State: Deals with the entire application. An example is preferences.
Page State: Deals with a specific page. Includes things like user-entered text, selected element in a list, etc.

11. Saving/Restoring State

12. Managing State

13. AW State Management

14. AW State Management

15. Module 4 Review Application Life Cycle Saving/Restoring State
AW State Management