What should the view model do in MVVM?
The view model typically does not directly reference the view. It implements properties and commands to which the view can data bind. It notifies the view of any state changes via change notification events via the INotifyPropertyChanged and INotifyCollectionChanged interfaces.
How to share data between view models Stack Overflow?
In the constructor of VM2 you would go to the collection and retrieve the Project placed in there by VM1. If you used a dictionary of key-value pairs it would also allow you to share other data between view models. Thanks for contributing an answer to Stack Overflow!
Which is a non-visual class in MVVM?
View Model: The view model is a non-visual class and does not derive from any WPF or Silverlight base class. It encapsulates the presentation logic required to support a use case or user task in the application. The view model is testable independently of the view and the model.
How is one ViewModel shared by multi-views-codeproject?
As the title, I want one viewmodel shared by Several views. And I just want a copy created in the memory,sothat each view can use the same property. Please Sign up or sign in to vote. Your question is very broad, and lacks a lot of details. So I cannot answer question, but I can give tell you want I would do.
How does the view reference the view model?
The view references the view model through its DataContext property. The controls in the view are data bound to the properties and commands exposed by the view model. The view may customize the data binding behavior between the view and the view model.
When to raise the propertychanged event in a view model?
In order for the view model to participate in two-way data binding with the view, its properties must raise the PropertyChanged event. View models satisfy this requirement by implementing the INotifyPropertyChanged interface, and raising the PropertyChanged event when a property is changed.
https://www.youtube.com/watch?v=C6SXd31LmDo