hello every body ... and thanx for yor time...

i have a gridview that it takes its List<> Collection datasource at runtime but does not view the collection content if the property:

AutoGenerateColumns assigned to "False"

the code is:

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
    <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
        onrowcancelingedit="GridView1_RowCancelingEdit"
        onrowdeleting="GridView1_RowDeleting" onrowediting="GridView1_RowEditing"
        onrowupdating="GridView1_RowUpdating" Width="210px">
        <Columns>
            <asp:BoundField HeaderText="product id" />
            <asp:BoundField HeaderText="name" />
            <asp:CommandField ButtonType="Button" EditText="Change" InsertVisible="False"
                ShowDeleteButton="True" ShowEditButton="True" />
        </Columns>
        <EmptyDataTemplate>
            Your Cart Is Empty.
        </EmptyDataTemplate>
        <HeaderStyle BackColor="#8AB82E" ForeColor="White" />
    </asp:GridView>

and

public partial class Default2 : System.Web.UI.Page
{
    ShoppingCart cart;
    protected void Page_Load(object sender, EventArgs e)
    {
        if (Session["cart"] == null)
        {
            cart = new ShoppingCart();
            Session["cart"] = cart;
        } 
        else
        {
            cart = (ShoppingCart)Session["cart"];
        }

        GridView1.DataSource = cart.CartItems;//here CartItems is a List<CartItem>

        //GridView1.AutoGenerateColumns = true; //if i uncomment this line that solve the problem partialy ... cuz all collumns of that collection will appear
        
        //if (!Page.IsPostBack)
            GridView1.DataBind();

any help is approciated ...

Set DataField property of columns as

<Columns>
            <asp:BoundField HeaderText="product id" DataField="ProductID"  />
            <asp:BoundField HeaderText="name" DataField="Name" />
            <asp:CommandField ButtonType="Button" EditText="Change" InsertVisible="False"
                ShowDeleteButton="True" ShowEditButton="True" />
        </Columns>