c# print barcode zebra printer Inside the Implementation in Visual C#

Printing Quick Response Code in Visual C# Inside the Implementation

Inside the Implementation
QR Code ISO/IEC18004 Printer In Visual C#.NET
Using Barcode creation for Visual Studio .NET Control to generate, create Denso QR Bar Code image in .NET applications.
www.OnBarcode.com
QR Code Recognizer In C#
Using Barcode recognizer for VS .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
We often refer to the process of deactivating an application as tombstoning.
Barcode Creator In Visual C#.NET
Using Barcode creation for .NET Control to generate, create barcode image in VS .NET applications.
www.OnBarcode.com
Barcode Reader In Visual C#
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
ch a pter fi v e
Make QR-Code In .NET
Using Barcode drawer for ASP.NET Control to generate, create QR-Code image in ASP.NET applications.
www.OnBarcode.com
Making QR Code In .NET
Using Barcode printer for Visual Studio .NET Control to generate, create QR Code image in VS .NET applications.
www.OnBarcode.com
} return (T)result; } }
Generate Quick Response Code In VB.NET
Using Barcode generation for .NET Control to generate, create QR-Code image in VS .NET applications.
www.OnBarcode.com
DataMatrix Encoder In Visual C#.NET
Using Barcode creation for VS .NET Control to generate, create Data Matrix ECC200 image in VS .NET applications.
www.OnBarcode.com
The objects that you save in the State dictionary must be serializable.
Bar Code Creator In Visual C#.NET
Using Barcode printer for .NET Control to generate, create bar code image in .NET framework applications.
www.OnBarcode.com
Draw QR Code JIS X 0510 In C#
Using Barcode creation for VS .NET Control to generate, create QR Code JIS X 0510 image in VS .NET applications.
www.OnBarcode.com
Each view model is responsible for managing its own state when the phone deactivates or reactivates the application. All the view models in the application derive from the ViewModel class that attaches an OnDeactivated handler method to the Deactivated event and an OnActivated handler method to the Activated event in the PhoneApplicationService class. The following code example shows part of the abstract ViewModel class. Note: The developers at Tailspin chose not to use the Application _Activated and Application_Deactivated event stubs in the App.xaml.cs file. Instead, each view model is responsible for persisting and reloading its own state.
Draw UPC A In Visual C#.NET
Using Barcode maker for Visual Studio .NET Control to generate, create UPC Symbol image in .NET framework applications.
www.OnBarcode.com
Make UPCE In C#
Using Barcode drawer for .NET Control to generate, create UPC-E Supplement 5 image in .NET framework applications.
www.OnBarcode.com
C# public abstract class ViewModel : NotificationObject, IDisposable { protected ViewModel(INavigationService navigationService) { PhoneApplicationService.Current.Deactivated += this.OnDeactivated; PhoneApplicationService.Current.Activated += this.OnActivated; . } public virtual void IsBeingDeactivated() { } public abstract void IsBeingActivated(); private void OnDeactivated(object s, DeactivatedEventArgs e) { this.IsBeingDeactivated(); }
Scanning QR Code 2d Barcode In C#.NET
Using Barcode scanner for .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Create UPC A In Visual Basic .NET
Using Barcode creator for VS .NET Control to generate, create GS1 - 12 image in Visual Studio .NET applications.
www.OnBarcode.com
using serv ices on the phone
Make Bar Code In VS .NET
Using Barcode printer for VS .NET Control to generate, create barcode image in .NET framework applications.
www.OnBarcode.com
Paint Bar Code In None
Using Barcode drawer for Online Control to generate, create barcode image in Online applications.
www.OnBarcode.com
private void OnActivated(object s, ActivatedEventArgs e) { this.IsBeingActivated(); } }
Generating UPC-A In Java
Using Barcode creation for BIRT Control to generate, create GS1 - 12 image in BIRT applications.
www.OnBarcode.com
Print QR Code In Java
Using Barcode encoder for Java Control to generate, create QR-Code image in Java applications.
www.OnBarcode.com
Each view model can override the IsBeingDeactivated and Is BeingActivated methods to provide its custom state saving and restoring behavior. The following code example shows how the SurveyListViewModel class saves and restores its state.
GS1 128 Generation In None
Using Barcode generator for Font Control to generate, create EAN 128 image in Font applications.
www.OnBarcode.com
Painting Code 128 Code Set C In Java
Using Barcode printer for Java Control to generate, create Code 128 Code Set C image in Java applications.
www.OnBarcode.com
C# public override void IsBeingDeactivated() { Tombstoning.Save("SelectedTemplate", this.SelectedSurveyTemplate); Tombstoning.Save("MainPivot", this.SelectedPivotIndex); base.IsBeingDeactivated(); } public override sealed void IsBeingActivated() { if (this.selectedSurveyTemplate == null) { var tombstoned = Tombstoning .Load<SurveyTemplateViewModel>("SelectedTemplate"); if (tombstoned != null) { this.SelectedSurveyTemplate = new SurveyTemplateViewModel( tombstoned.Template, this.NavigationService); } this.selectedPivotIndex = Tombstoning.Load<int>("MainPivot"); } }
Remember, the activated event is not raised when the application is launched, and the deactivated event is not raised when the application is closed.
The IsBeingActivated method is called by the application s Activated event when the application is reactivated; it is also called from the constructor of each view model class. There are two reasons for this apparent duplication of effort. First, the constructors are not always invoked when the application is activated because the application is not always killed when it s deactivated. Second, the constructor logic sometimes requires the state data to complete its initialization logic, and the constructors run before the Activated event is raised.
ch a pter fi v e
If the application is loading for the first time, there won t be any state data, and the view model can initialize any default values. If the application is reactivating, it can use the saved state data to initialize any values. Reactivation and the Panorama Control When your application is reactivated by the operating system, you should restore the UI state, which in the Tailspin application includes displaying the active question if the application was tombstoned while the user was completing a survey. However, the SelectedIndex property of the Panorama control is read-only. To work around this problem and display the correct question when the application is reactivated, Tailspin changes the DefaultItem property of the control instead. This must be done in the code-behind file for the view. The following code example shows the event handlers in the code-behind for the TakeSurveyView page.
C# private bool loaded; private void PanoramaSelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e) { if (this.loaded) { ((TakeSurveyViewModel)this.DataContext) .SelectedPanoramaIndex = this.panorama.SelectedIndex; } } private void PanoramaLoaded(object sender, System.Windows.RoutedEventArgs e) { this.panorama.DefaultItem = this.panorama.Items[ ((TakeSurveyViewModel)this.DataContext) .SelectedPanoramaIndex]; this.loaded = true; }
If the application has been deactivated, and the user relaunches the application from the Start menu, the operating system will delete the saved state, so the application will behave as if it is loading for the first time.
The SelectedPanoramaIndex of the TakeSurveyViewModel class tracks the currently active question in the Panorama control.
using serv ices on the phone
Handling Asynchronous Interactions
4, Building the Mobile Client, describes how Tailspin implemented commands in the mobile client application. For some commands, Tailspin implements the command asynchronously to avoid locking the UI while a time-consuming operation is running. For example, on the AppSettingsView page, a user can enable or disable push notifications of new surveys from the Microsoft Push Notification Service (MPNS). This requires the application to send a request to the MPNS that the application must handle asynchronously. The application displays a progress bar on the AppSettingsView page while it handles the asynchronous request. For more information about MPNS, see 6, Connecting with Services. Tailspin decided to use the Reactive Extensions (Rx) for .NET to run asynchronous tasks on the phone because it enables them to create compact, easy-to-understand code for complex asynchronous operations. Rx allows you to write compact, declarative code to manage complex, asynchronous operations. Rx can be described by comparing it to the more familiar concept of enumerable collections. Figure 3 shows two alternative approaches to iterating over a sequence.
Copyright © OnBarcode.com . All rights reserved.