Pro WPF and Silverlight MVVM: Effective Application by Gary Hall

By Gary Hall

WPF and Silverlight are in contrast to the other consumer interface (UI) applied sciences. they've been equipped to a brand new paradigm that—if harnessed correctly—can yield remarkable strength and function. This e-book indicates you ways to regulate that strength to supply fresh, testable, maintainable code. it truly is now well-known that any non-trivial WPF or Silverlight program wishes be designed round the Model-View-ViewModel (MVVM) layout development with the intention to free up the technology's complete data-binding potential.  notwithstanding, the data of ways to do that is lacking from a wide a part of the advance community—even among those that paintings with WPF and Silverlight each day. Too usually there's a reliance on programmatic interplay among controls and never sufficient belief within the applied sciences' data-binding services. This results in a clouding of layout values and an inevitable lack of functionality, scalability, and maintainability in the course of the program. Pro WPF and Silverlight MVVM will assist you to organize your software in order that it might probably develop up to required in any path with out hazard of cave in.

What you’ll learn

  • Understand why the separation of an application’s View and its version is paramount, together with the historical past of Model-View-Presenter and Model-View-Controller.
  • Apply WPF and Silverlight’s robust data-binding version accurately.
  • Examine tips to set up an application targeting WPF or Silverlight, together with unit-testing, source-control, separation of issues, info serialization, and the way to tie every thing including MVVM.
  • Develop a full video game improvement program utilizing MVVM by way of instance.
  • How to serialize the version with out being invasive, the best way to enforce a plug-in structure that extends either the View and the version, and the way to deal with Exceptions gracefully.

Who this booklet is for

builders that desire to the way to architect WPF or Silverlight purposes to make sure maintainability, testability, and separation of matters.

Table of Contents

  1. Overview of WPF and Silverlight
  2. DataBinding
  3. Model-View Separation
  4. The ViewModel
  5. Events and instructions
  6. Validation
  7. Unit checking out
  8. Data entry Layer
  9. Application aid
  10. Sample program

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Extra info for Pro WPF and Silverlight MVVM: Effective Application Development with Model-View-ViewModel

Sample text

Applications of this parameter are typically related to validation, which is covered in Chapter 6. BindsDirectlyToSource When using a derivative of DataSourceProvider, such as ObjectDataProvider (which is covered later in this chapter), you are binding to the underlying data via a provider. If you wish to bind to the provider itself, you can set BindsDirectlyToSource to true, to override the default behavior. Converter and ConverterParameter The next section covers value converters in more detail.

NET data access layer returns a DataTable record set, the Table Module must provide the required Domain Services on this data model before passing the result—also as a DataTable record set—out to the View. This obviates the common requirement for a domain model that is rich in object-oriented design; polymorphism, inheritance, composition and the like are all unavailable. XML Objects Bypassing even a data-mapping layer and binding directly to the data source is possible when using XML. This creates a two-tier architecture, as shown in Figure 2–2.

Listing 2–20. Month + 2) / 3; } } This code will be familiar: it is almost exactly the same as before, albeit with minor refactoring here and there. As Listing 2–21 shows, the XAML will now change rather significantly because we no longer require a multibinding or converter. Listing 2–21. Foreground> The only piece of this code that should provide any surprises is the TextBlock’s Text binding. This is an example of the BindsDirectlyToSource parameter that was outlined earlier.

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