模板列的问题

Question

DropDownList的AutoPostBack设为true
响应SelectedIndexChanged 事件，
protected void km_SelectedIndexChanged(object sender, EventArgs e)
    {
        IList<C> lists =new  List<C>();
        lists.Add(new C(this.km.SelectedValue));
        this.DataGrid1.DataSource = lists;
        this.DataGrid1.DataBind();        
    }
class C
{
    private string name;
    public string Name
    {
        get
        {
            return name;
        }
    }
    public C(string name)
    {
        this.name = name;
    }
}
同时将DataField="姓名"改为DataField="Name"