WinForms Data Grid - Automatically expand a new master row

• Enable the GridView.OptionsDetail.AllowExpandEmptyDetails option for the master grid view
• Handle the GridView.RowCountChanged event to call the GridView.SetMasterRowExpanded method to expand a master row.

Note

This example does not work with sorted or filtered data sources.

Files to Review

• Form1.cs (VB: Form1.vb)