How to disable check out if document status is pending?

Question

I have installed Sharepoint Foundation 2010 and configured a Shared Document Library to support versioning and approval.

Now I would like to disable the possibility for a user to check out a document, if there is already document with approval status Pending.

Is it possible? Do I need to develop a custom web part?

Answer 1

You can build a custom SPItemEventReceiver to trap the ItemCheckingOut event, perform your check and cancel the operation (and event display a message to the user) if the approval status column is "Pending".

Here is a walkthrough: http://karinebosch.wordpress.com/walkthroughs/event-receivers-walkthrough2/