datagridview的databinding

datagridview使用databingdings.add方法为什么不好使？必须使用datasource吗？

 public Form1()
        {
            InitializeComponent();
            t1 = new test() { id = "1", name = "a" };
            source = new List<test>();
            source.Add(new test() { id = "1", name = "a" });
            source.Add(new test() { id = "1", name = "1" });
            source.Add(new test() { id = "1", name = "1" });
            this.dataGridView1.DataBindings.Add("DataSource", this, "source", false, DataSourceUpdateMode.OnPropertyChanged);

            this.textBox1.DataBindings.Add("Text", t1, "name", false, DataSourceUpdateMode.OnPropertyChanged);
            //this.dataGridView1.DataSource = source;


        }

楼上说的不对啊，我问的是为什么不能像
textBox1.DataBindings.Add ( "Text" , dsDataSet1, " Customers.CustomerID " ) ;
这样，把datagridview绑定到一个list