private void dataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
if (e.ColumnIndex == dataGridView1.Columns["StartTime"].Index || e.ColumnIndex == dataGridView1.Columns["EndTime"].Index)
{
if (dpString.dTrim(e.Value) != "")
{
e.Value = Convert.ToDateTime(e.Value).ToString("MM/dd/yyyy - HH:mm:ss");
}
}
}