How to get all keywords from the Keywords termset programatically (Enterprise Keywords)

Question

Just like I can go to Central Administration > Application Management > Manage Service Applications > Managed Metadata Service and see the list of existing terms under the Keywords termset I'd like to do this programatically in C#.

So what I need to do is access somekind of Managed Metadata Service API, open the Keywords termset (which is the default termset for Entreprise Keywords) and then get a list of all the existing keywords that are applied to at least one document. For each term I'd like to know to which document is applied so then I can run some process to know which terms are most frequently used and which are most infrequently used.

Forgot to mention this is for SharePoint 2010 Server.

Answer 1

You will need to reference the Microsoft.SharePoint.Taxonomy assembly. Then you can open a Taxonomy Session and do what you need to do.

var site = SPContext.Current.Site;
var taxonomySession = new TaxonomySession(site);
var termSet = taxonomySession.DefaultKeywordsTermStore.KeywordsTermSet;

EDIT

MSDN has this documented in detail: http://msdn.microsoft.com/en-us/library/ee587369(v=office.14).aspx