What is the difference between DTO and ViewModel?
The canonical definition of a DTO is the data shape of an object without any behavior. ViewModels are the model of the view. You can look at the viewmodel as all the data for a view plus behaviors. ViewModels may or may not map one to one to business objects or DTOs.
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’s the difference between edit model and domain model?
For edit model we see we have different requirement from Domain and View Model.We have required field validations,”SelectList” based properties which will directly bind the dropdownlist on user interface.Also we have a set of id fields which will be used to set the selectedvalues in the dropdownlists (like ManagerId,DepartmentId etc).
What’s the difference between model and ViewModel in MVC?
Before that we are going to start with what is meant by model and What is the Difference between Model and ViewModel in MVC. Domain Model represents a domain object in our application like a Entity Framwork ,SQL… (while using ORM). The model is an object, using that we can pass the information/data to the database.
How many model classes for viewmodels and domain entities?
This can be achieved with only two model classes for ViewModels and Domain Entities. Instead of modelling the domain logic with separate model classes that are similar to the persisted entities, implement it in service classes that consume the domain entities.
How are view models defined in presentation layer?
I prefer to have view models defined in my presentation layer and use domain models to communicate between presentation layer and business layer. And at BL, convert domain objects to data entities and communicate with DAL. Using this approach I have to use mapping twice.