Developer forum

We get a null-reference exception when using either item.GetValue("myproperty") as ListViewModel or item.GetValue<ListViewModel>("myproperty") if no properties are selected on the item value.

If any other experience this issue, you may use this small extension untill Dynamicweb gets it fixed:

    public static class GetListViewValueExtensions
    {
        public static string GetSelectedValue(this Dynamicweb.Frontend.ItemViewModel item, string name)
        {
            try
            {
                var listViewModel = item.GetValue(name) as ListViewModel;
                if (listViewModel == null) return "";
                return listViewModel.SelectedValue;
            }
            catch(Exception e) 
            {
                return "";
            }
        }
    }