1 / 30

Advanced Programming Patterns for Windows 7

DEV304. Advanced Programming Patterns for Windows 7. Kate Gregory Gregory Consulting www.gregcons.com/kateblog , @ gregcons. Agenda. Libraries Tasks that set Status or send commands Restart and Recovery Trigger Started Services Managed code only. Call to Action.

odell
Download Presentation

Advanced Programming Patterns for Windows 7

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. DEV304 Advanced Programming Patterns for Windows 7 Kate Gregory Gregory Consulting www.gregcons.com/kateblog, @gregcons

  2. Agenda • Libraries • Tasks that set Status or send commands • Restart and Recovery • Trigger Started Services • Managed code only

  3. Call to Action • Windows 7 has been here for almost two years • You’ve made your app work on Windows 7 • UAC • DPI scaling • Hardcoded file paths • You’ve lit up your app with visuals • Jumplists • Taskbar overlays • Ribbon • Now take the next step

  4. Windows 7 is more than eye candy • Stop polling! You can be notified • Power management • Network awareness • Service triggers • Be considerate • Restart and recovery • Work the way the user thinks • Libraries • Jumplists

  5. Windows 7 Recipes • Samples on Code Gallery • Yours to use, change, learn from • Dependency on Code Pack • http://code.msdn.microsoft.com/Windows-7-Taskbar-Single-4120eafd • http://code.msdn.microsoft.com/Windows-Restart-and-cc461aa9 • http://code.msdn.microsoft.com/Windows-Trigger-Start-f75f0fbb

  6. Libraries • Aggregation of (pointers to) folders • Don’t have to be on the same machine • Users can control what folders are in a library • More control for them, less coding for you

  7. Libraries demo

  8. Create and Manage Libraries • var lib = new ShellLibrary("KateDemo", false); • lib.Dispose(); • ShellLibrary.ShowManageLibraryUI("KateDemo", • new WindowInteropHelper(this).Handle, • "Demo Library Manager", "Manage the KateDemo Library", • true);

  9. Delete a Library • string librariesPath = Path.Combine( • Environment.GetFolderPath( • Environment.SpecialFolder.ApplicationData), • ShellLibrary.LibrariesKnownFolder.RelativePath); • string libraryPath = Path.Combine(librariesPath, "KateDemo"); • string libraryFullPath = Path.ChangeExtension(libraryPath, • "library-ms"); • File.Delete(libraryFullPath);

  10. Use a Library to open files • using (varlib = ShellLibrary.Load("KateDemo", true)) • { • varpickLocationDialog = new CommonOpenFileDialog(); • pickLocationDialog.Title = "Open a file"; • pickLocationDialog.DefaultDirectoryShellContainer = • ShellFolder.FromParsingName(lib.ParsingName) as ShellContainer; • pickLocationDialog.InitialDirectoryShellContainer = • ShellFolder.FromParsingName(lib.ParsingName) as ShellContainer; • pickLocationDialog.AllowNonFileSystemItems = false; • pickLocationDialog.IsFolderPicker = false; • pickLocationDialog.Multiselect = false; • var result = pickLocationDialog.ShowDialog(); • if (result == CommonFileDialogResult.Cancel) { MessageBox.Show("You cancelled"); } • else { MessageBox.Show("You selected " + pickLocationDialog.FileName); }

  11. Watching a library • watcher = new ShellObjectWatcher(lib, true); • watcher.AllEvents += Watcher_LibraryChanged; • watcher.Start(); • void Watcher_LibraryChanged(object sender, • ShellObjectNotificationEventArgsargs) • { • // args will tell you what’s going on • . . .

  12. Tasks • Jumplist tasks launch another exe • Open the help in help viewer, the readme in notepad • Launch a companion app • But what if you want tasks to communicate to the running app? • The exe you launch is your own exe again • Has to be modified to be “single instance”

  13. Single Instance Application and Tasks demo

  14. Single Instance for Tasks • SingleInstanceManager manager = • SingleInstanceManager.Initialize(GetSingleInstanceManagerSetup()); • // . . . • private static SingleInstanceManagerSetupGetSingleInstanceManagerSetup() • { • return new SingleInstanceManagerSetup("WpfSample") • { • ArgumentsHandler = • args => ((App)Application.Current).ProcessCommandLineArgs(args), • ArgumentsHandlerInvoker = new ApplicationDispatcherInvoker(), • DelivaryFailureNotification = • ex => MessageBox.Show(ex.Message, "An error occurred") • }; • }

  15. Adding Tasks to the Jumplist • string cmdPath = Assembly.GetEntryAssembly().Location; • JumpListjumpList = JumpList.CreateJumpList(); • jumpList.AddUserTasks( • new JumpListLink(cmdPath, Status.Online.ToString()) • { Arguments = Status.Online.ToString() }, • new JumpListLink(cmdPath, Status.Away.ToString()) • { Arguments = Status.Away.ToString() }, • new JumpListLink(cmdPath, Status.Busy.ToString()) • { Arguments = Status.Busy.ToString() }); • jumpList.Refresh();

  16. Restart and Recovery • Prevent lost data • Your own code is called when app is terminating • Store ephemeral data • On startup, check for a restart hint • Restore ephemeral data • Problem: too much freedom • What to store, and where? • File format • How to structure restart hint?

  17. Restart and Recovery Recipe • Leverages Serialization • You write a document class, call it anything, add attribute • Use generics to instantiate a helper based on that document • Methods of the helper • Check for restart • Register for restart and recovery • Helper takes care of the rest • naming the file • serializing into or out of it (XML or Binary) • Constructing the restart hint

  18. Restart and Recovery demo

  19. Restart and Recovery • private RestartRecoveryHelper<SampleDocument> rrh; • // ... • rrh = new RestartRecoveryHelper<SampleDocument>(); • SampleDocumentrecovereddoc = rrh.CheckForRestart(); • if (recovereddoc != null) • { • doc = recovereddoc; • // ... • } • rrh.RegisterForRestartAndRecovery("TestHarness", • "Recover", doc, 50000, • FileType.Xml, • RestartRestrictions.None);

  20. Trigger Started Services • Windows Services consume a significant amount of memory and CPU • Autostarted services make startup slow • Delayed start really didn’t work • Trigger started services can be ideal • More responsive (happy users) • No wasted CPU waking and polling (happy users) • Less code to write (happy developers)

  21. Trigger Started Services Recipe • A TriggerStart class on which you set triggers • It configures the service for you after it’s installed • Helper classes for triggers • Join or leave domain • Open or close a specific port on the firewall • Group policy changes • First IP address is gained or last IP address is lost • A specific ETW custom event is raised • A specific device (eg USB drive) is connected or disconnected

  22. Trigger Started Services demo

  23. Handle the After Install Event • TriggerStartts = new • TriggerStart(USBServiceInstaller.ServiceName); • GuidGuid_USBDevice = new Guid( • "53f56307-b6bf-11d0-94f2-00a0c91efb8b"); • const string DeviceName = @"USBSTOR\GenDisk"; • ts.Triggers.Add( • new DeviceInterfaceArrivalTrigger( • ServiceTriggerAction.ServiceStart, • Guid_USBDevice,DeviceName)); • ts.CommitChangesToService();

  24. Next Steps for You • Make your Windows app a Windows 7 app • Code Pack can help, or WPF4 • Think about going beyond the visual • Power awareness, network awareness • Libraries • Restart and Recovery • Trigger Started Services • Take advantage of what the platform has to offer!

  25. DEV Track Resources • http://www.microsoft.com/visualstudio • http://www.microsoft.com/visualstudio/en-us/lightswitch • http://www.microsoft.com/expression/ • http://blogs.msdn.com/b/somasegar/ • http://blogs.msdn.com/b/bharry/ • http://www.microsoft.com/sqlserver/en/us/default.aspx • http://www.facebook.com/visualstudio

  26. Resources • Connect. Share. Discuss. http://northamerica.msteched.com Learning • Sessions On-Demand & Community • Microsoft Certification & Training Resources www.microsoft.com/teched www.microsoft.com/learning • Resources for IT Professionals • Resources for Developers http://microsoft.com/technet http://microsoft.com/msdn

  27. Complete an evaluation on CommNet and enter to win!

More Related