Hello Satish,

The igPivotGrid does support drilldown, samples illustrating this in practice may be seen in our sample repository at:

http://igniteui.com/pivot-data-selector/using-the-asp-net-mvc-helper-with-xmla-data-source

http://igniteui.com/pivot-grid/binding-to-xmla-data-source

Regarding your second question, SSAS Actions through ADOMD.NET support will be included in the igOlapXMLADataSource in the upcoming 14.1 release of IgniteUI.

Hope this helps. Please do not hesitate to contact me if you have any questions.