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MS Office Forum / Outlook / Programming Add-Ins / July 2007How to monitor deleted calendar events?
Hello, I'm wondering the best way to monitor when an event gets deleted from the calendar? There doesn't seem to be a notification for this specific event. Instead, I've been monitoring the "Deleted Items" folder for any events being added to this folder. I track events based on their Entry ID. This seems to work, but I've run into a case where the Entry ID changes for a specific event between the time it is on the calendar, and when it gets added into the deleted items folder. This only seems to happen when running the calendar on an exchange server (and not all exchange servers, just one so far that I know of). I really have 2 questions: Are there any better ways to track if a calendar event gets deleted? Why/how would the exchange server put an event with a different Entry ID into the Deleted Items folder when a calendar event gets deleted? Thanks, Mark -- Beiley Software http://www.beiley.com I believe I have read somewhere that EntryID is not guaranteed to stay the same, if the item is moved to a different folder, and has an even higher chance of being changed if the item is being moved to a new Store. Are you using outlook 2003 or 2007? As 2007 now has exposed more events, specifically related to Deletion of items. > Hello, > [quoted text clipped - 17 lines] > -- > Beiley Softwarehttp://www.beiley.com Thanks for the reply. My add-in needs to work on Outlook 2000, 2002, 2003, and 2007, so I need a way to find out when a calendar event is deleted for any of these platforms. Thanks, Mark -- Beiley Software http://www.beiley.com >I believe I have read somewhere that EntryID is not guaranteed to stay > the same, if the item is moved to a different folder, and has an even [quoted text clipped - 28 lines] >> Beiley Software >> http://www.beiley.com EntryID will change if an item is moved or deleted when using an Exchange store provider. It doesn't change in those circumstances with a PST store provider. If an item is moved to a different store EntryID always changes. The best you'd be able to do is monitor the folder's ItemRemove event, which fires after an item is deleted and doesn't point to the item, plus ItemAdd on DeletedItems. If an item is hard deleted it won't go to Deleted Items. If you have to monitor that you can only check which item or items are missing from a list you maintain of the Items collection when you get ItemRemove. That event won't fire if more than 16 items are deleted at once or the last item in the folder is deleted. The only fix for those problems is usually to use a timer to sweep the folder and see if anything was added or is missing.  SignatureKen Slovak [MVP - Outlook] http://www.slovaktech.com Author: Professional Programming Outlook 2007 Reminder Manager, Extended Reminders, Attachment Options http://www.slovaktech.com/products.htm > Thanks for the reply. My add-in needs to work on Outlook 2000, 2002, > 2003, and 2007, so I need [quoted text clipped - 6 lines] > Beiley Software > http://www.beiley.com Thanks Ken, that is very helpful. Do I understand correctly that the EntryID will 'always' change when using an Exchange store? How do you learn this? Is it documented somewhere, or do you just learn by trial/error? I will pursue the idea of monitoring ItemRemove and maintaining my own list of items. Thanks, Mark -- Beiley Software http://www.beiley.com > EntryID will change if an item is moved or deleted when using an Exchange > store provider. It doesn't change in those circumstances with a PST store [quoted text clipped - 22 lines] >> Beiley Software >> http://www.beiley.com I'm not sure if it's documented anywhere and each store provider implements its own behavior as to changing EntryID or not, my own knowledge of that is from lots of experience. Things are better with Outlook 2007, in that version you have a Folder.BeforeItemMove event that fires before an item is moved or deleted from a folder. That event passes you Item, MoveTo and Cancel arguments. Cancel lets you cancel the action by setting it True, Item is the item the action is being taken on and MoveTo will be null (Nothing) if the item is being deleted. MoveTo will pass the destination folder if it's a move and not a delete. SignatureKen Slovak [MVP - Outlook] http://www.slovaktech.com Author: Professional Programming Outlook 2007 Reminder Manager, Extended Reminders, Attachment Options http://www.slovaktech.com/products.htm > Thanks Ken, that is very helpful. Do I understand correctly that the > EntryID will 'always' change when using an Exchange store? How do you [quoted text clipped - 10 lines] > Beiley Software > http://www.beiley.com Thanks again Ken. It is good to hear there are improvements available in Outlook 2007. I'm going to have to stick with a solution that will work for older versions too though... Thanks, Mark -- Beiley Software http://www.beiley.com > I'm not sure if it's documented anywhere and each store provider > implements its own behavior as to changing EntryID or not, my own [quoted text clipped - 7 lines] > being deleted. MoveTo will pass the destination folder if it's a move and > not a delete. Yes, most of my addins still have to support Outlook 2000 and up (a few for 2002 and up) so most of the neat new features that Randy added to the Outlook object model don't do me any good either. It is nice when I get an Outlook 2007-only addin though :) SignatureKen Slovak [MVP - Outlook] http://www.slovaktech.com Author: Professional Programming Outlook 2007 Reminder Manager, Extended Reminders, Attachment Options http://www.slovaktech.com/products.htm > Thanks again Ken. It is good to hear there are improvements available > in Outlook 2007. I'm going to have to stick with a solution that will [quoted text clipped - 5 lines] > Beiley Software > http://www.beiley.com |
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