Get all user profiles in SharePoint 2010

Question

I'm using the User Profile Service Application in SharePoint 2010 which contains imported user profiles.

Now I want to display a list of all users who have a profile, to show a list like "my colleagues". But the Profile Service API doesn't seem to have a way to get all user profiles.

I suspect this is due to performance reasons, but even so, what would be a way to actually retrieve all profiles?

using .AllUsers feels problematic since it doesn't match the list of profiles.

Answer 1

This will give you all profiles, without restrictions:

var serviceContext = SPServiceContext.GetContext(site);
var userProfileManager = new UserProfileManager(serviceContext);
foreach (UserProfile userProfile in userProfileManager)
{
    // ...
}

This operation in itself is not super costly, but retrieving individual user profile properties can be.

You'll most likely need to elevate while doing this.