如何使用嵌套中继器添加多个（嵌套）类别？

Question

我想使用嵌套转发器添加多个category->subcategory-> sub-subcategory：

http://i.stack.imgur.com/bMiYZ.png

与此相似，但数据库中包含更多类别和子类别。

<form id="form1" runat="server">
    <div>
        <ul>
            <asp:Repeater ID="outerRep" runat="server" OnItemDataBound="outerRep_ItemDataBound">
                <ItemTemplate>
                    <li>
                        <asp:Label Font-Size="Large" Font-Bold="true" ID="lblCategoryName" runat="server" Text='<%# Eval("CategoryName") %>' />
                    </li>
                    <ul>
                        <asp:Repeater ID="innerRep" runat="server">
                            <ItemTemplate>
                                <li style="background-color: AliceBlue">
                                    <asp:HyperLink ID="hlProductName" runat="server" Text='<%# Eval("SubCategoryName")%>' />
                                </li>
                            </ItemTemplate>
                        </asp:Repeater>
                    </ul>
                </ItemTemplate>
            </asp:Repeater>
        </ul>
    </div>
</form>

代码隐藏：

protected void Page_Load(object sender, EventArgs e)
{
    BindData();
}

private void BindData()
{
    SqlConnection myConnection = new SqlConnection("Data Source=.; uid=sa; pwd=xxx;database=registration;");
    SqlCommand myCommand = new SqlCommand("usp_GetProductsForCategories", myConnection);

    myCommand.CommandType = CommandType.StoredProcedure;
    SqlDataAdapter ad = new SqlDataAdapter(myCommand);
    DataSet ds = new DataSet();

    ad.Fill(ds);

    // Attach the relationship to the dataSet
    ds.Relations.Add(new DataRelation(
        "CategoriesRelation",
        ds.Tables[0].Columns["CategoryID"],
        ds.Tables[1].Columns["CategoryID"]));

    outerRep.DataSource = ds.Tables[0];
    outerRep.DataBind();
}

protected void outerRep_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
    if (e.Item.ItemType == ListItemType.Item ||
        e.Item.ItemType == ListItemType.AlternatingItem)
    {
        DataRowView drv = e.Item.DataItem as DataRowView;
        Repeater innerRep = e.Item.FindControl("innerRep") as Repeater;

        innerRep.DataSource = drv.CreateChildView("CategoriesRelation");
        innerRep.DataBind();
    }
}

还是有更好的方法吗？请帮忙。