Disable WPF buttons during longer running process, the MVVM way

Question

I have a WPF/MVVM app, which consists of one window with a few buttons.
Each of the buttons triggers a call to an external device (an USB missile launcher), which takes

Answer 1

Try this:

//Declare a new BackgroundWorker
BackgroundWorker worker = new BackgroundWorker();
worker.DoWork += (o, ea) =>
{
    try
    {
        // Call your device

        // If ou need to interact with the main thread
       Application.Current.Dispatcher.Invoke(new Action(() => //your action));
    }
    catch (Exception exp)
    {
    }
};

//This event is raise on DoWork complete
worker.RunWorkerCompleted += (o, ea) =>
{
    //Work to do after the long process
    disableGui = false;
};

disableGui = true;
//Launch you worker
worker.RunWorkerAsync();