仅计算可见行的合计列c# winform

DataGridViewRowCollection rows = dataGridView1.Rows;
List<DataGridViewRow> visibleRows = new List<DataGridViewRow>();

foreach (DataGridViewRow row in rows)
{
    if (row.Visible)
    {
        visibleRows.Add(row);
    }
}

int total = 0;

foreach (DataGridViewRow row in visibleRows)
{
    foreach (DataGridViewCell cell in row.Cells)
    {
        if (cell.Visible && cell.ColumnIndex == columnIndex) // 假设要计算的列索引为columnIndex
        {
            int value;
            if (int.TryParse(cell.Value.ToString(), out value))
            {
                total += value;
            }
        }
    }
}

labelTotal.Text = total.ToString();