Hello Larry,

Yes, it is possible to add a context menu on child table. You can use OnRowContextMenu Client-side event available in WebGrid, and then use the menuObject parameter provided in the event to add a context menu.

However, you will be required to add a validation in order to show the specific context menu on child table.

I have attached a sample for your reference. In this sample, I add a validation to show the specific context menu on child table "Orders". Therefore, when you expand the first child table and right-click on the row, you will see there is an additional command on the context menu called "View Row's KeyValue".

Hope this helps.

Thank you.