Ive build a custom section where I have my products. My goal is I want to reach these product from my content pages. Therefore I created a custom datatype with a contentpicker. The contentpicker should be able to pick a product from my custom section. Here's my code from my customdatatype:

   public partial class ShopContentPicker : System.Web.UI.UserControl,
        umbraco.editorControls.userControlGrapper.IUsercontrolDataEditor
    {
        protected ContentPicker _nodePicker = new ContentPicker();
        protected void Page_Load(object sender, EventArgs e)
        {
            _nodePicker.AppAlias = "shop";
            _nodePicker.TreeAlias = "Products";
            plhControls.Controls.Add(_nodePicker);
           
        }

        #region IUsercontrolDataEditor Members

        public object value
        {
            get
            {
                return _nodePicker.Value;
            }
            set
            {
                if (value != null)
                {
                        _nodePicker.Value = value.ToString();
                }
            }
        }

        #endregion
    }

 Ive added my custom datatype to my documenttype. After that its visible on my contentpage (products). It launhces fine and the productstree is visible, but when I pick a node, its looking for corresponding edit page which it shows in the custom section. And off cource this results in an error. So in a way the tree is doing what ive coded earlier, but in this new  situation I want to pick the nodeid (product).  So how can I achieve this, Im looking for same functionality which the mediapicker offers, just on my custom section with the contentpicker.