Stop Deletion of a Content Control during the Before Delete event

[rruckus]

I have a Content Control in my Word document that I want to make sure no one deletes. I was hoping to use the "Document_ContentControlBeforeDelete" event to check the tag name and then stop the delete based on the name of the tag, but I don't see a way to stop the delete. Usually there would be a "Cancel" option or similar. Trying to "Undo" within that function doesn't work. "Undo" could be set on an "application.run" or timer to move it later in the stack but that's really a hack, because someone could then "redo". Does anyone know how to do this? Or is there another way?

I can't rely on the CC "Locked" property because users could always change the lock and then delete it - among other reasons.

Any ideas?

[gmaxey]

The only reasonable thing I can suggest is to apply editing restrictions to the document (No changes, read only) and make the CCs editable regions.

[UserName500]

Hello.

I'm trying to cancel the deletion of a content control with the event "Document_ContentControlBeforeDelete" using C# in Visual Studio 2015.

But I could not find out yet. So far I managed to recreate the same content control, when it gets deleted:

        private void ActiveDocument_ContentControlBeforeDelete(Word.ContentControl OldContentControl, bool InUndoRedo) {

            string oldTag = OldContentControl.Tag;
            string oldTitle = OldContentControl.Title;
            string oldText = OldContentControl.Range.Text;


            reCreateCC(oldTag, oldTitle, oldText);


        }


        private void reCreateCC(string oldTag, string oldTitle, string oldText) {

            RichTextContentControl ReechText = vstoDocument.Controls.AddRichTextContentControl("CC_" + System.Convert.ToString(++index));


            ReechText.Tag = oldTag;
            ReechText.Title = oldTitle;
            ReechText.Range.Text = oldText;

        }

But this is for sure not the best solution and it's very buggy. Does anyone know how to cancel the deletion in a proper way?

[UserName500]

I have come across a solution that solved my problem. I just registered an event, when the Selection changes, Word checks if a content control is present in that selection. IF there is a content control, the selection is set to 0. So the user can't select a content control to delete it.

vstoDocument = Globals.Factory.GetVstoObject(this.Application.ActiveDocument);

vstoDocument.SelectionChange += VstoDocument_SelectionChange;

private void VstoDocument_SelectionChange(object sender, SelectionEventArgs e) {
            
Word.Selection selection = this.Application.Selection;

            foreach (Word.ContentControl c in selection.ContentControls)
            {

                if(c != null)
                {
                    selection.SetRange(0, 0);
                    MessageBox.Show("Content Controls not selectable!");
                }

            }


            
        }

You can thank me later