RowSpan Property of Datagridview in Windows application

Remember RowSpan property is only applicable when your control is placed inside a TableLayoutPanel, if this is true in that case you can access the RowSpan as following.

private void TestGridView_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
       {
           int rowSpan = tableLayoutPanel1.GetRowSpan((DataGridView)sender);
       }