Cancel change active document

[Anonymous]

Hi

How can I stop changing active document?

I was thinking I could use this, but I don't know how to cancel it in the event handler:

AcadApp.DocumentManager.DocumentToBeActivated += new DocumentCollectionEventHandler(DocumentManager_DocumentToBeActivated);

static void DocumentManager_DocumentToBeActivated(object sender, DocumentCollectionEventArgs e)
{
    // Messagebox to ask if user are sure
    bool AreYouSureYouWantToChangeActiveFile = MessageBox....

    if(!AreYouSureYouWantToChangeActiveFile)
        //cancel change active file somehow...???
}

[Alexander.Rivilis]

DocumentCollection.DocumentActivationEnabled property can help you

[Anonymous]

Hi

I could not get it to work. When I set the property you mentioned the active document has already changed. And if I set the property to false at a earlier stage I will never come to the listener. Any ideas?

static void DocumentManager_DocumentToBeActivated(object sender, DocumentCollectionEventArgs e)
{
            DialogResult dialogResult = MessageBox.Show("You are changing the active drawing. Continue?", "Active drawing change", MessageBoxButtons.YesNo);
            if (dialogResult == DialogResult.Yes)
            {
                AcadApp.DocumentManager.DocumentActivationEnabled = true;
                RemoveDocumentToBeActivatedListener();
            }
            else if (dialogResult == DialogResult.No)
            {
                AcadApp.DocumentManager.DocumentActivationEnabled = false;
            }
}

[Alexander.Rivilis · Accepted solution]

1. You can disable switching of Document's at all if you call:

AcadApp.DocumentManager.DocumentActivationEnabled = false;

 but not in handler of event of DocumentToBeActivated.

2. If you have to prevent switching in a handler of event of DocumentToBeActivated you have to:

a) save previous Document and set flag of switching in this handler.

b) in command reactor switch Document back to previous Document and clear flag of switching.

[DiningPhilosopher]

Perhaps you can explain why you want to prevent a document from being activated?

[Anonymous]

I have created an application that scans and does something with the active document and I haven't implemented support for what happens when active document is changed. So for my demo version I thought I could just prevent the user from changing the document.

[Alexander.Rivilis]

While command with CommandFlags.Modal is active user can not switch active document. More precisely when switching to another document, the command will paused and wait for switch back.

[Anonymous]

Hi Alex,

Which is command reactor switch Document back to previous Document ?

Will this solution run correct when new drawing is created ?

Thank for your suggest.

[phliberato]

I have tried almost everything to accomplish that, but I couldn't cancel the document opening at DocumentToBeActivated event. Has anyone resolved it?