DataGridView中CheckBox实现某一列单选

private void dgvchannel_cellclick(object sender, datagridviewcelleventargs e)
        {
            if (e.columnindex == -1 || e.rowindex == -1) return;
            int x = dgvchannel.currentcell.columnindex;//获取鼠标的点击列
            if (x == 0)//点击第一列是单选。
            {
                for (int i = 0; i < dgvchannel.rows.count; i++)
                {
                    datagridviewcheckboxcell checkcell = (datagridviewcheckboxcell)dgvchannel.rows[i].cells[0];
                    checkcell.value = false;
                }
                datagridviewcheckboxcell ifcheck = (datagridviewcheckboxcell)dgvchannel.rows[e.rowindex].cells[0];
                ifcheck.value = true;
            }
        }