private void fillSelectedWithRandomNumbersToolStripMenuItem_Click(object sender, EventArgs e) { foreach (DataGridViewCell cell in dgvShapeData.SelectedCells) { switch (cell.ColumnIndex) { case 6: cell.Value = XF.Random(0, 255); break; case 8: case 9: cell.Value = XF.Randomf(); break; default: cell.Value = XF.Random(); break; } } }