public SqlDataAdapter GetPersonRedeploy(string cPsnNum)        {
            string selectStr = "select * from person where person.cPsn_Num='" + cPsnNum + "'";
            this.sqlC = new SqlConnection(DBOperate.connectStr);
            this.sqlCmd = new SqlCommand(selectStr, this.sqlC);
            this.sqlC.Open();
            this.sqlDa = new SqlDataAdapter(sqlCmd);
            return this.sqlDa;
        }
SqlDataAdapter sda = dbop.GetPersonRedeploy(dataGridView1.CurrentCell.Value.ToString());
                DataTable table = new DataTable();
                sda.Fill(table);
                bindingSource2.DataSource = table;
                dataGridView2.DataSource = bindingSource2;
我从person取出数据,并把它填充到dataGridView2中,dataGridView2中启用删除和编辑,可是要怎么样才能更新数据源呢?