在分组行获得焦点时，本示例展开已折叠的分组行，或者折叠已展开的分组行。

C#CopyCode image复制代码
using DevExpress.XtraGrid.Views.Base;

private void gridView1_FocusedRowChanged(object sender, FocusedRowChangedEventArgs e) {
      if (gridView1.IsGroupRow(e.FocusedRowHandle)) {
         bool expanded = gridView1.GetRowExpanded(e.FocusedRowHandle);
         gridView1.SetRowExpanded(e.FocusedRowHandle, !expanded);
      }
}
Visual BasicCopyCode image复制代码
Imports DevExpress.XtraGrid.Views.Base

Private Sub GridView1_FocusedRowChanged(ByVal sender As System.Object, _
  ByVal e As FocusedRowChangedEventArgs) Handles GridView1.FocusedRowChanged
      If GridView1.IsGroupRow(e.FocusedRowHandle) Then
         Dim expanded As Boolean = GridView1.GetRowExpanded(e.FocusedRowHandle)
         GridView1.SetRowExpanded(e.FocusedRowHandle, Not expanded)
      End If
End Sub