invoke all viewmodel propertychanged in MVVM

essamce 621

Hi
I have Wpf App implemented MVVM, and all viewmodels exists in One viewmodel called MainViewModel, so how to invoke PropertyChanged for all Properties in ALL viewmodels in the MainViewModel?
I know OnPropertyChanged(""); invokes all properties in a class, but i want it for whole project which exist in MainViewModel.

using .NetFramwork 4.7
thanks in advance, any help will be appreciated.

essamce 621 Reputation points

2021-03-26T09:39:07.837+00:00

since all viewmodels inherted from ViewModelBase i'm thinking of using reflection to call all properties in MainViwModel of type ViewModelBase and invoke OnPropertyChanged("");
but i don't know if this is a good idea in MVVM.
DaisyTian-1203 11,621 Reputation points

2021-03-29T02:44:30.507+00:00

@essamce
I‘m a little confused by your description of the question, why do you want to invoke all the viewModel propertychanged? If the UpdateSourceTrigger value is UpdateSourceTrigger.PropertyChanged, then the value pointed to by the right arrow of TwoWay or the OneWayToSource bindings is updated as soon as the target property changes. Did you set UpdateSourceTrigger=PropertyChanged for the Binding in your UI?

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invoke all viewmodel propertychanged in MVVM