Bind IsEnabled property for Button in WPF

Question

I have a Button which needs to be enabled/disabled programmatically. I want to achieve this using a binding to a bool. Here is the Button XAML:

<Button x:Name="logInButton" Height="30" IsEnabled="{Binding IsLoggedIn}">
                            <Image Source="/images/img.png"></Image>
                        </Button>

Here is the code being called:

        public MainWindow()
        {
            InitializeComponent();
            enabled = false;
        }
        private bool enabled;
        public bool IsLoggedIn
        {
            get
            {
                return enabled;
            }
            set
            {
                enabled = value;
            }
        } 

The value of the property IsLoggedIn is assigned correctly. But IsEnabled is not assigned the value I need. For example:

I tried setting the value with Binding Path and Binding Source but nothing is working.

Please advise what may be wrong.

Answer 1

Then... I think must be so.

class Model : INotifyPropertyChanged
    {
        public bool enabled;
        public bool IsLoggedIn
        {
            get
            {
                return enabled;
            }
            set
            {
                enabled = value;
                OnPropertyChanged("IsLoggedIn");
            }
        }
        public event PropertyChangedEventHandler PropertyChanged;
        public void OnPropertyChanged([CallerMemberName]string property = "")
        {
            if (PropertyChanged != null)
                PropertyChanged(this, new PropertyChangedEventArgs(property));
        }
    }