List of all users having access to at least one site in the site collection

Question

I want to retrieve all the users who are having any access to at least one site in a site collection. I tried using 'SPWeb.SiteUsers' and it gave me almost what i wanted. The only exception was - it also returns me the users which once had permission one some site, but their permission were revoked later.

Is there a way to get all active users having access to at least one site in a given site collection ?

Answer 1

There is no way to get that list. SharePoint don't even know it.

SiteUsers is the closest, but as you've already found out it includes users who has had access to a site (or items on a site) (and have used that access). But it doesn't include users who have access due to a group membership, but haven't used that access yet.

So the best would be to look in the governance document specifying who has access. ;-)

Answer 2

SPWeb.SiteUsers will fetch you all the users in that Site Collection.

SPWeb.Users is what you are looking for. It should fetch you all the active users of a perticular site.

http://weblogs.asp.net/bsimser/archive/2006/03/13/440169.aspx

Another thing that’s interesting is that if you did add “spsuser” to the site manually he would show up in the SPWeb.Users list above. However if you removed him, he would vanish from SPWeb.Users but he would still show up in the SPWeb.SiteUsers list. His ID # is reserved so the next user you added manually would have an ID of #6 (in the case of the site) and if you re-added “spsuser” at a later date, he would re-appear in both lists with an ID of #5.