[BUG]DelegateCommand.ObservesProperty method does not function correctly

[ColoCoffee]

Description

I have a WPF project, and I want to monitor a property through the ObservesProperty method of a DelegateCommand, and trigger DelegateCommandBase.RaiseCanExecuteChanged by a change in the property. Unfortunately, no matter what I try, it doesn't work.

Here is a link to the repo - https://github.com/ColoCoffee/PrismTest.git

Steps to Reproduce

1. Create project, add Prism.
2. create 2 windows and 2 Viewmodels, Binding command;
3. Viewmodel inherits BindableBase.
4. Create the corresponding DelegateCommand in the ViewModel, specify its executeMethod and canExecuteMethod during initialization, and ObservesProperty() to monitor the properties.
5. is monitored by the value of the property changes to trigger RaisePropertyChanged();.
6. the canExecuteMethod is not re-executed.

Platform with bug

WPF

Affected platforms

Windows

Did you find any workaround?

no

Relevant log output

No response

[brianlagunas]

You have some big problems in your code, but that's not what's causing this specific issue. ObservesProperty only works with public properties. This means it will not work with a private variable.

This is your issue -> private StartViewModel _startViewModel;

Change that to a public property and it will work as expected.