How to get number of discussions and solutions on a Widget?

Yes, you could use the $core_v2_forumThread.List() API with a combination of its filter options, specifying a small page size, which will still return a total count.

For example, to get a count of all verified, answered, threads, you could use:

#set($answeredThreads = $core_v2_forumThread.List("%{ ForumThreadQueryType = 'Answered', PageIndex = 0, PageSize = 1 }"))

Verified, Answered questions: $answeredThreads.TotalCount

Similarly, you could filter to non-answered, or only threads with suggested answers. You could also limit that to only a specific forum or all forums in a particular group by ID. And you could of course get the current group or forum ID from the contextual forums and groups in $core_v2_forum.Current or $core_v2_group.Current.

For member counts, you can perform something similar with the $core_v2_user.List() API. This will list for an entire site. Or if you only want the number of members of a specific group, you could use the $core_v2_groupUserMember extension.

Please excuse the double-encoded formatting above. It should be:

#set($answeredThreads = $core_v2_forumThread.List("%{ ForumThreadQueryType = 'Answered', PageIndex = 0, PageSize = 1 }"))

Verified, Answered questions: $answeredThreads.TotalCount

Thanks Michael, this helps.

Thanks Michael, this helps.