///
        /// 实现DataGridView控件中CheckBox列的使用
        ///
        ///
        ///
        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;
                }
            }