I would like to update the content of a drop-down list in one column based on the selection from a drop-down list in another column.

For example, the user could select a category in one column, then the drop-down list in the next column would offer products from that category only.

How can I do this with iGrid.NET?

I've seen a “One-to-many combos” example in “Extra samples”, but it's valid for ActiveX control.

Thank you in advance for your reply.
Why don't use the same idea for iGrid.NET? You can create many sub-lists as iGDropDownList object and select them in the cell of the 2nd column depending on the choice in the 1st column. In iGrid ActiveX it is done with the CellCtrlKey property, in iGrid.NET - with the DropDownControl property of the cell.