将datagridview1内容更新到sql数据库

主要是用      dataGridView1.CurrentRow.Cells[0].Value获取值
    if (dataGridView1.CurrentRow.Cells[0].Value.ToString() == "Administrator")
            {
                MessageBox.Show("不能删除系统管理员");
                return;
            }
            string sql =string.Format(@"delete from loginInfo where 用户名 = '{0}'",dataGridView1.CurrentRow.Cells[0].Value.ToString());
            db.OperateData(sql);
            db.BindDataGridView(dataGridView1, "select 用户名,密码 from loginInfo");