/// <summary>         /// 实现DataGridView控件中CheckBox列的使用         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void dgvTradList_CellContentClick(object sender, DataGridViewCellEventArgs e)         {             if (e.ColumnIndex == 0 && e.RowIndex != -1)             {                 if ((bool)dgvTradList.Rows[e.RowIndex].Cells[0].EditedFormattedValue == true)                 {                     dgvTradList.Rows[e.RowIndex].Cells[0].Value = false;                 }                 else                 {                     dgvTradList.Rows[e.RowIndex].Cells[0].Value = true;                 }             }