<eo:TreeView runat="server" id="TreeView1" ControlSkinID="None" Width="500px"

 AllowDragDrop="True" AllowEdit="True"
 OnItemRenamed="TreeView1_ItemRenamed" 
 OnItemMoved="TreeView1_ItemMoved"
     
 CausesValidation="false">
 
    <LookNodes>
        ...
    </LookNodes>
</eo:TreeView>

private void ReloadMenu()
{

    DataSet mainDs = FileCategoryFacad.GetFileCategoryDataSetByList(fccList, true);

    TreeView1.DataSource = mainDs;

    EO.Web.DataBinding bindingName = new EO.Web.DataBinding();
    bindingName.DataField = "Name";
    bindingName.Property = "Text-Html";

    TreeView1.Bindings.Add(bindingName);

    EO.Web.DataBinding bindingId = new EO.Web.DataBinding();
    bindingId.DataField = "Id";
    bindingId.Property = "ItemID";

    TreeView1.Bindings.Add(bindingId);

    TreeView1.ItemDataBound += new NavigationItemEventHandler(TreeView1_ItemDataBound);

    TreeView1.DataBind();
}



private void TreeView1_ItemDataBound(object sender, NavigationItemEventArgs e)
{
    int fccId = int.Parse(e.TreeNode.ItemID);

    CustomItem customItem = new CustomItem();
    customItem.ID = "customItemId_" + fccId.ToString();

    Literal ltlText = new Literal();
    ltlText.Text = "test";
    customItem.Controls.Add(ltlText);

    EO.Web.TreeNode subNode = new EO.Web.TreeNode();
    subNode.Text = "customItem_Holder_" + customItem.ID;
    subNode.LookID = "None";
    subNode.LineImageUrl = "Blank";
    subNode.CustomItemID = customItem.ID;

    e.TreeNode.SubGroup.Nodes.Add(subNode);
}