Basic Configuration, Actions and Conventions. Open Visual Studio and create. Cheat Sheet. This serves as a quick guide to the most frequently used. All About Actions. We briefly introduced actions in Pt. 1, but there is so much.
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All About Actions
If you have a property on your ViewModel with the same name as an element, we will attempt to databind them. But the WP7 platform enforces a View-First approach by controlling page navigation.
If you are transitioning away from a screen, it makes sure it gets deactivated.
For the first approach, when we have dozens controls in view, we can get lost. Since all the built-in conductors have a CloseStrategy, we can create conductor specific mechanisms for shutdown and calibudn them in easily. Forms when the view is a ContentPage. Since Screen does, it hooks up the hierarchical relationship. However, in a navigation based application, navigating away from a page would definitely cause deactivation, but it might also cause that page to close.
Have you ever tried to write a clear WPF application, but it was too complicated?
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SimpleContainer is the main class used for Dependency Injection in Caliburn. But I chose to do this in order to represent the role this class was playing in doxumentation system and keep things as architecturally consistent as possible. To demonstrate doocumentation easy it is to build your application with Caliburn. Since we want to maintain a list of open items, but only keep one item active at a time, we use Conductor.
To fix the MainViewModel problem: There are two contextual views for this ViewModel see below. But, that will have to mlcro until next time. This is recursive so dependencies are satisfied for the whole object graph returned. RegisterPerRequest registers an implementation to be registered against a type, key or both. Since it does not, it will just proceed to activate the new item.
Forms, this was mostly used for a underused feature of. Web that was accidentally included. Target is that you can set it to a System. By specifying IWindowManager as a constructor parameter we are explicitly requesting it as a non optional service.
In most cases constructor injection is the best option because it makes service requirements explicit, however property injection has many use cases. Anything that goes through the ViewModelBinder will have its action target set automatically. OnActivate — Override this method to add logic which should execute every time the screen is activated.
GetChildren— Call this method to return a list of all the items that the conductor is tracking. This is a key feature of these implementations because it creates a composite pattern between screens and conductors.
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Constructor injection is the most widely used form of dependency injection and it denotes a required dependency between services and the class into which they are injected. Name to a property or method within the ViewModel of the same name. ActivateItem — Call this method to activate a particular item.
Now is time to add life to our application. The following code will work: Micro-specific part of this markup. You might think of documentxtion as a stateful unit of work existing within the presentation tier of an application. Micro configuration, and load the MainViewModel as the first screen. However, you should remember that these are two separate roles.
You should now be ready to build your project and check the application has been wired up correctly. Any new documenattion registered with the parent will not be registered in the child container implicitly. If you leave off the event, the parser will use the ConventionManager to determine the default event to use for the trigger.
It has one property named Parent.
Model attached property in the same way. Suppose we were to re-write our parameterized SayHello action with the Message. Interactivity to populate the parameters, or customizing the Parser.
Simple IoC Container
We want to write elegant, testable, maintainable and extensible presentation layer code…and we want it to be easy to do so. In simple scenarios, the ScreenActivator is dicumentation the same class as the Screen. But, you could also use this for any number of async tasks. You can always be explicit of coarse.
First, we should add the method in the view model: The CI feed is available for Caliburn. When a new item is activated, the previous active item is deactivated only and it remains in the Items collection. It provides implementation of Caligurn interface, and allows to raise property change notifications.
This is all it takes to create a navigation application in Caliburn.