Can a ViewModel have more than one model?
ViewModel is nothing but a single class that may have multiple models. It contains multiple models as a property. It should not contain any method. In the above example, we have the required View model with two properties. This ViewModel is passed to the view as a model. To get intellisense in the view, we need to define a strongly typed view.
How to pass multiple models to the controller?
Using this tuple object we can pass multiple models from the controller to the view. public ActionResult IndexTuple() { ViewBag. Message = “Welcome to my demo!”; var tupleModel = new Tuple , List >(GetTeachers(), GetStudents()); return View( tupleModel); }
Which is an example of a design pattern?
2) Suppose you want to create multiple instances of similar kind and want to achieve loose coupling then you can go for Factory pattern. A class implementing factory design pattern works as a bridge between multiple classes. Consider an example of using multiple database servers like SQL Server and Oracle.
How to create a common interface for classes with?
What you talk about is polymorphism, which literally means having many shapes. For example, you might have a base class called Animal, which has a method called Eat (Food food);. Then you might have three classes inheriting from Animal like Dog, Cat, and Hen.
What is the definition of a ViewModel in Java?
ViewModel is nothing but a single class that may have multiple models. It contains multiple models as a property. It should not contain any method. In the above example, we have the required View model with two properties. This ViewModel is passed to the view as a model.
How are model changes propogated to the view?
If the view is binding to the Model directly then as long as the service is using the same instance any changes to the model properties will be propogated to the view. However if you are recreating a new model in the service then you will give the viewmodel the new model.
What is the relationship between model and view?
There’s typically a one-to-many relationship between the view model and the model classes. The view model might choose to expose model classes directly to the view so that controls in the view can data bind directly to them.