Printable View
I want to use a DataGridView to show parent-records that are expandable to show children records. Basically, the top-level data shows class names, and expanding each class name shows the students enrolled in that class... that kind of thing.
Can the DataGridView control do that, or do I need to use the TreeView control?
The DGV cannot do that by default. You could make it do so with some heavy modification but that would be a daunting task. There would be third-part grids that could do it, maybe inheriting the DGV and providing that heavy modification or built from scratch.
A DataGridView cannot show multiple levels as done say in MS-Access. You can look at OutlookGrid at Code Project which is in C Sharp but usable in VB.NET.