How can I fill a Combobox in a datagridview? C#

I have made by code a datagridview. This datagridview has several comboboxes.

I want to populate this comboboxes at runtime. But I don't know how.

The code I tried:

NaardataGridView2.CurrentCell.Value = getKolommen(selVanTabellen);

getKolommen give a datatable with names. The above code doesn't work. I want something like:

NaardataGridView2.CurrentCell.DataSource = getKolommen(selVanTabellen);

Can some one help me?