04 | Handling Files in Windows Store...
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04 | Handling Files in Windows Store Apps Jerry Nixon | Microsoft Developer Evangelist Daren May | President & Co-founder, Crank211
Transcript of 04 | Handling Files in Windows Store...
04 | Handling Files in Windows Store Apps
Jerry Nixon | Microsoft Developer Evangelist
Daren May | President & Co-founder, Crank211
Microsoft
Virtual
Academy
File Namespaces
File Namespaces
• Windows.Storage.StorageFolder– Copy, Move, Rename, Delete
• Windows.Storage.StorageFile
• Copy, Move, Rename, Delete
• Windows.Storage.FileIO– Read, Write, Append methods
• Windows.Storage.Pickers– Folder, save/open File, Third Party
Capabilities and Strategies
• AppxManifest Capabilities
• App Storage (readonly)– “ms-appx://folder/file”
• Local Storage
• “ms-appdata://local/folder/file”
• “ms-appdata://roaming/folder/file”
• “ms-appdata://temp/folder/file”
File Namespaces
Read from Isolated Storage
Read Project Files
With a file picker
Without a picker
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Process Lightcycle Lifecycle Management
The User
Activates
Your App
splash screen
The User
Activates
Your App
splash screen
Trigger Condition
InternetAvailable,
InternetNotAvailable,
SessionConnected,
SessionDisconnected,
UserNotPresent,
UserPresent
TimeTrigger*
PushNotificationTrigger*
SessionStart*
ControlChannelTrigger*(**)
ServicingComplete
SessionConnected
SessionDisconnected
SmsReceived
TimeZoneChange
UserAway/UserPresent,
LockScreenApplicationAdded/Removed
OnlineIdConnectedStateChangeInternetAvailable
InternetAvailable/InternetNotAvailable
NetworkNotificationChannelReset
NetworkStateChange
MaintenanceTrigger
PushNotificationTrigger** *requires lock permission
**can run in App (not BackgroundHost.exe)
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Activating Windows Store Apps
ActivationPrimary
Tile
Secondary
Tile
Toast
Notification
Share
Target
Search
Contract
File
Activation
Protocol
Activation
Resume
File Activation
• AppxManifest Declaration– MIME Type
– Extension (File Type)
– Tool Tip
– Display Name
– Logo
• Reserved Words like: – Com, Exe, Lnk
• Can have command arguments
• Search the Store
Activations
Protocol Activation
• AppxManifest Declaration– Protocol
– Display Name
– Logo
• Reserved Words like: – Ms-windows-store
– InternetShortcut
• Using URL://Data/Data/Data
• Search the Store
Activations
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State Management Strategy
1. Resume as the user left it
2. Start fresh if a long period of time has elapsed
3. Save data when suspending (5 seconds)– Save along the way
4. Release exclusive resources
State Management Guidelines
• Comes with some Visual Studio templates
• RegisterFrame(frame), SaveAsync(), RestoreState()
Helpers :: Suspension manager
• Orientation Events– Visual State Changes
• SaveState(suspension), LoadState(suspension)
Helpers :: Layout aware page
State Management
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