How Stop or Cancel revit closing

[Anonymous]

HI everyone

I developing my addin using C# 2012, I need my application stop the closure revit. I have a routine that is executed when a button of RibbonPanel press and public Boolean variable is assigned true. Whether revit closing the variable = false, revit not close. I want to force the user to press the button before closing revit. That event or method I can use?. i try with DocumentClosing but this method run only if a document closing and not when revit closing .

thanks!

[arnostlobel]

It is not possible to prevent the end-user from closing Revit, not from via the Revit API anyway. I suppose you could use the Windows System API to prevent Revit closing, by stealing windows messages, for example. However, that may lead to unexpected behavior, sometime.

Arnošt Löbel

[jeremytammik]

Your add-in OnShutdown method should be called when and only when Revit is closing. That will at least give you a chance to display the message to the user and "force her to press a button", if you really think that is a good idea, even if it does not enable you to prevent Revit from closing.

Cheers,

Jeremy

[Moustafa_K]

You can try adding an Event Handler to stop Revit from Closing  you can add that on startup

  public Result OnStartup(UIControlledApplication Application)
        {
          ///some code

                Application.ApplicationClosing += Application_ApplicationClosing;

                return Result.Succeeded;
            }

        private void Application_ApplicationClosing(object sender, Autodesk.Revit.UI.Events.ApplicationClosingEventArgs e)
        {
         if(yourvariable== false)   e.Cancel();
        }

[jeremytammik]

Good suggestion!

You would have to check fiurst whether the application closing event is cancellable:

ApplicationClosingEventArgs is derived from RevitAPIEventArgs, and the RevitAPIEventArgs.Cancellable property indicates whether an event may be cancelled by an event delegate.

Can you confirm that?

Thank you!

Cheers,

Jeremy

[arnostlobel]

ApplicationClosing events aren't cancellable. It is by design.

If you try calling Cancel() on an event that is not cancellable, Revit throws an exception.

This is basically what I mean by stating that Revit cannot be prevented from shutting down via the Revit API.

[jeremytammik]

... as expected ...

Sorry Mostafa90, a shame about your good idea, but no cigar this time  🙂

[Moustafa_K]

Yeaah... 🙂 tried to Help any way.

[Anonymous]

Thanks guys!!!

[Anonymous]

Hello, I have the same problem now. Is there a solution to this topic?

[jeremytammik]

The Revit API will not help you with this, as explained above.

Therefore, you will have to treat this as a generic .NET and Windows question, on how to prevent an arbitrary application from closing. 

For instance, you can search for something like 'prevent windows application from closing .net':

https://duckduckgo.com/?q=prevent+windows+application+from+closing+.net

This thread suggest some valid solutions:

https://serverfault.com/questions/709765/prevent-users-from-closing-certain-application