private void ChoiceSelect_CheckedChanged(object sender, EventArgs e) { if (ChoiceSelect.Checked) { for (int i = 0; i < MaterialRecptGrid.RowCount; i++) { int rowHandle = MaterialRecptGrid.GetVisibleRowHandle(i); if (MaterialRecptGrid.IsDataRow(rowHandle)) { MaterialRecptGrid.SetRowCellValue(rowHandle, gridColumn1, true); } } } else { for (int i = 0; i < MaterialRecptGrid.RowCount; i++) { int rowHandle = MaterialRecptGrid.GetVisibleRowHandle(i); if (MaterialRecptGrid.IsDataRow(rowHandle)) { MaterialRecptGrid.SetRowCellValue(rowHandle, gridColumn1, false); } } } }