C#窗口窗体datagridview单元格格式化带有日期值和时间值的事件

private void dataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
    if (dataGridView1.Columns[e.ColumnIndex].Name == "DateColumn")
    {
        if (e.Value != null && e.Value != DBNull.Value)
        {
            DateTime dateValue = (DateTime)e.Value;
            e.Value = dateValue.ToString("yyyy-MM-dd");
            e.FormattingApplied = true;
        }
    }
    else if (dataGridView1.Columns[e.ColumnIndex].Name == "TimeColumn")
    {
        if (e.Value != null && e.Value != DBNull.Value)
        {
            DateTime timeValue = (DateTime)e.Value;
            e.Value = timeValue.ToString("HH:mm:ss");
            e.FormattingApplied = true;
        }
    }
}