I am using MVVM and want to enable a button on text change of datepicker control..

XAML Code Binding on DatePicker

SelectedDate="{Binding InactiveDate, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" DisplayDate="{Binding InactiveDate, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}">

Binding on Button

View Model Code I am using a DelegateCommand for button click

View Model Delegate Initialization SubmitCommand = new DelegateCommand(OnSubmitRequested, AllowSubmit, Controller);

The AllowSubmit implementation private bool AllowSubmit() { return InactiveDate != null; }

InactiveDate Property implementation public DateTime? InactiveDate { get { return _inactiveDate; }

        set
        {
            _inactiveDate = value;
            SubmitCommand.RaiseCanExecuteChanged();
            PropertyChanged(this, new PropertyChangedEventArgs("InactiveDate"));
        }
    }

SubmitCommand.RaiseCanExecuteChanged() should enable the button once I enter any character on DateTimePicker but it is not happening.