Hello,

I would recommend you to review the links below that will give you step by step guide on how to bind iggrid with Entity Framework.  The same approach can be taken for hierarchical data with modification:

<http://ko.infragistics.com/community/blogs/taz_abdeali/archive/2011/05/31/asp-net-mvc-3-entity-framework-infragistics-jquery-grid.aspx>  

<http://ko.infragistics.com/community/blogs/mihail_mateev/archive/2011/09/25/using-crud-operations-with-jquery-iggrid-entity-framework-and-and-asp-net-mvc3.aspx>

<http://ko.infragistics.com/community/forums/t/68393.aspx?PageIndex=1>

If you still need a sample for hierachicalgrid let me know if you want sample for Razor or with aspx page so I may create one for you.

I hope this helps.