ASP.NET Core 2 Fundamentals

ViewModels

ViewModels are entities where, when you update the model, your view will get updated automatically and vice versa. In many online articles and even in some books, the authors refer to ViewModels when they actually mean Models specific to the View.

In ViewModels, binding is two-way: when you update either the model or the view, the other one will get updated automatically.

Let us consider a simple example. You have a form with various fields on the left-hand side and print preview on the right-hand side. In this case, whatever you type in real time in the form will be reflected immediately on the right-hand side. In such cases, you can use pure ViewModels when you type; your ViewModel will be updated and that ViewModel will be consumed ...