We have been working with the latest Beta 2 of SharePoint 2007, and focusing on all the customizing that is SO much easier, in 2007 then in 2003. The events are one of the much improved things in 2007, and I have been digging into them in the last week. I thought it might be helpful to post my findings, to see if it is useful to other people.
I went pretty thoroughly the events available on a list, creating a custom class that subclasses from the SPItemEventReceiver. I didn’t touch the ContextMenu event, because I didn’t want to get into that yet. I did override all the other events, and tracked the order in which they fired. There are some issues where the current SDK for the beta is not correct, and has sample code that doesn’t and can’t work. I will go through that as well, but here are the results from the order of events, most are as you expected.
Order of Events
These results are using the SharePoint UI, I haven’t tracked the order of events on modifying lists programmatically yet.
|
Action
|
Event Order
|
|
Add an item
|
ItemAdding
ItemAdded
|
|
Update an item
|
ItemUpdating
ItemUpdated
|
|
Add an item with an single attachment (if you add more then one attachment AttachmentAdding and AttachmentAdded will fire as many times as there are attachments)
|
ItemAdding
ItemAttachmentAdding
ItemAttachmentAdded
ItemAdded
|
|
Update an item with adding an Attachment
|
ItemUpdating
ItemAttachmentAdding
ItemAttachmentAdded
ItemUpdated
|
|
Update an item with deleting an Attachment
|
ItemUpdating
ItemAttachmentDeleting
ItemAttachmentDeleted
ItemUpdated
|
|
Checking a file in
|
ItemCheckingIn
ItemCheckedIn
|
|
Updating and Checking in a file from Word 2003 or 2007
|
ItemUpdating
ItemUpdated
ItemUpdating
ItemCheckingIn
ItemUpdated
ItemCheckedIn
|
|
Moving a file in a document library from one folder to another folder, using Network Share.
|
ItemAdding
ItemUpdating
ItemAdded
ItemUpdating
ItemUpdated
ItemUpdating
ItemUpdated
ItemDeleting
ItemDeleted
|
|
Creating a Folder in a List or Document Library
|
ItemAdding
ItemAdded
|
Those are the events that I have gone through so far. When moving a file while SharePoint Designer (Frontpage), the events don’t fire when moving files from folder to folder.
The events ItemAdding, ItemAdded fire when adding a file using SharePoint Designer, and they do fire when updating a file, but just not when moving.
Updating an Item
After reading the SDK section, “Creating a Basic Event Handler”, I found that the documentation is just wrong. The example at the end of the page –
|
public override void ItemAdded(SPItemEventProperties properties)
{
properties.AfterProperties["Body"] = "Body text maintained by the system.";
}
|
It is just wrong, because the AfterProperties property is read only, and you can only get the properties, same with the BeforeProperties. I tried to put in some basic auditing using an Updating or Updated event, write to a hidden column on the item, the contents of the changes. I know there is the ChangeLog in SharePoint 2007, but I was curious to see how to do auditing with events.
Since, I couldn’t set the AfterProperties like the SDK explains, I simple update the item programmatically. I thought it would create an infinite loop, because the event would fire and the item would update itself, and cause the event to fire again. It didn’t behave that way, it fired 9 times and then stopped. I’m still researching, but it is very unusual. I plan to write some simple logic, that if only the hidden column is being updated then don’t update again, to get around the loop, but I’m not sure if Microsoft is planning to make the AfterProperties able to be set in Beta 2 – TR or if this is the way they are planning to leave it.
Well, I will go back to battling w/ the SharePoint 2007, and hammering away on events. We should have a post about the “joy” of Workflow, soon as well.
Morgan
?>
posted @ Thursday, December 06, 2007 5:47 PM