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Delegate Command, CanexecuteMethod gets never executed

Dec 9, 2011 at 9:33 AM


is there anything special to watch out for while implementing a Delegate Command? The Command itself is working fine but the associated CanExecuteMethod does not seem to be called.



Dec 10, 2011 at 8:07 AM
Edited Dec 10, 2011 at 8:08 AM


If you want to use the CanExecute delegate then you have to:

1. Specify the CanExecute method in the constructor of the DelegateCommand.

Code extract from EmailClient.Applications / CreateEmailAccountController class:

nextCommand = new DelegateCommand(Next, CanNext);
private bool CanNext() { return emailAccountsViewModel.IsValid; }

2. Notify the command with RaiseCanExecuteChanged() when the CanExecute method might return a new value.

Code extract from EmailClient.Applications / CreateEmailAccountController class:

private void UpdateCommandsState()


Dec 10, 2011 at 8:36 AM

Step 2 solved it. Thanks :)