Should ViewModel know about model?
Models are just the plain data, and a ViewModel is something that acts like a padding in between the two, that it should get information from the Model and pass it onto the View, and the View should know how to present it.
How do I access my razor ViewModel?
Right-click in the Store Index action method and select Add View as before, select Genre as the Model class, and press the Add button. This tells the Razor view engine that it will be working with a model object that can hold several Genre objects.
What is difference between model and ViewModel?
A model is usually more closely related to how your data is stored (database, services, etc.) and the model will closely resemble those. The ViewModel on the other hand is closely related to how your data is presented to the user. It is usually a flatten version of your model, denormalized, etc.
How do I access model controller?
In Solution Explorer, right-click the Controllers folder and then click Add, then Controller. In the Add Scaffold dialog box, click MVC 5 Controller with views, using Entity Framework, and then click Add. Select Movie (MvcMovie. Models) for the Model class.
How does ViewModel work?
ViewModel class is designed to store and manage UI-related data in a lifecycle conscious way.It is the main component in the MVVM architecture. ViewModel can be created with activity context or fragment context. When a ViewModel object is created, it is stored inside Activity OR FragmentManager.
How does View communicate with ViewModel?
All logic for the view happens in ViewModel. Rule Number Two: In response to events view does nothing except notifying view-model by calling a method. View does not pass any view related classes to view model. Rule Number Three: ViewModel uses live data as the main way to communicate to view!
How do you pass data from model to view?
The other way of passing the data from Controller to View can be by passing an object of the model class to the View. Erase the code of ViewData and pass the object of model class in return view. Import the binding object of model class at the top of Index View and access the properties by @Model.
Can there be two models one view?
In MVC we cannot pass multiple models from a controller to the single view.
Why do we use ViewModel?
The purpose of ViewModel is to encapsulate the data for a UI controller to let the data survive configuration changes. For information about how to load, persist, and manage data across configuration changes, see Saving UI States.
What is ViewModel and model in MVC?
What is ViewModel? ViewModel in the MVC design pattern is very similar to a “model”. The major difference between “Model” and “ViewModel” is that we use a ViewModel only in rendering views. We put all our ViewModel classes in a “ViewModels” named folder, we create this folder.
How do you pass data from Model to view?
How do you communicate between view and ViewModel?
View / ViewModel Communication via Commands
- The invoker is a piece of code which can execute some imperative logic.
- Typically, it is a UI element that the user interacts with, in the context of a UI framework.
- It could just be another chunk of logic code somewhere else in the application.