Prevent project and Pro from closing

Question

Under a certain condition I need to prevent the user from closing both the project they have opened and the Pro application (essentially disabling the X button in the upper right corner). I have subscribed to ProjectClosingEvent and set args.Cancel to true. The project still closes while Pro does not. What should be done to keep the project open? Thanks.

public Module1()
 {
     ProjectClosingEvent.Subscribe(OnProjectClosing);
 }

private Task OnProjectClosing(ProjectClosingEventArgs args)
 {
    if (CanClosePro == false)
    {
        args.Cancel = true;
        return Task.FromResult(0);
    }
 else
   {
        return Task.CompletedTask;
    }
 }

azlotin · Answer

Thanks Uma, the code does work as expected, sorry for the confusion. There was another OnProjectClosing event handler in the solution which led to the unexpected results.

UmaHarano · Answer

Hi Alex, Have you set the autoload DAML attribute to true to load your module? I am wondering if the event subscription kicked in. One way to confirm can be to put System diagnostic messages in your OnProjectClosing event handler. I use that to test events. I was able to disable Project closing with your code. Thanks Uma if (CanClosePro == false) { args.Cancel = true; System.Diagnostics.Debug.WriteLine(.. return Task.FromResult(0); }‍‍‍‍‍‍