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How does the view model work in MVVM?
Transparent Communication – The view model provides a transparent interface to the view controller, which it uses to populate the view layer and interact with the model layer, which results in a transparent communication between the layers of your application. Some people think that for simple UIs, MVVM can be overkill.
What does flow of control mean in MVVM?
It means the view either has it’s own thread (which is not that unusual) or (as @Euphoric points out) flow of control is coming into the view from something else not depicted here. If it’s the same thread then the View will know when the View-Model is ready to be read.
Are there cycled in the architecture of MVVM?
Yes, the cycled don’t exist (and shouldn’t) in the architecture of the code. But cycles between runtime instances are common and often lead to simpler design. That is case in MVVM. In MVVM View depends on ViewModel, and ViewModel uses events to notify View about it’s changes.
What’s the difference between a view and a ViewModel?
VIEW: ( Platform Specific Code – USER INTERFACE ) What the user sees, The Formatted data. VIEWMODEL: ( Reusable Code – LOGIC ) Link bewteen Model and View OR It Retrieves data from Model and exposes it to the View. This is the model specifically designed for the View. Life Cycle state of Application will be maintained.
Which is the main object of MVVM design pattern?
Model View View-Model (MVVM) is basically a UI Based Design Pattern. The main object of MVVM is to provide a rich UI, testability features, code more reusability and complex data binding. It helps to improve the separation of the business and presentation layers without any direct communication between each other.
What does MVVM stand for in C #?
MVVM stands for Model, View, and ViewModel. The piece you are missing is the Model, which is where your data access code lives.
How is the ViewModel aware of the model?
The ViewModel is unaware of the view directly. Communication between the View and ViewModel is through some property and binding. Models are connected directly to the ViewModel and invoke a method by the model class, it knows what the model has, like properties, methods etcetera and also is aware of what the view needs.