[Solved] Grid Row Action "Edit" leads to Null pointer Exception

[Frank Michael]

This code leads to a null pointer exception.
It works, if I comment the row s.Edit() and it does not work, if I uncomment the row.

Html.Telerik().Grid<WorkitemTableRowPattern>()
        .BindTo(Model.rows)
        .Name("WorkitemGrid")
        .Localizable("de-DE") //ToDo Culture allgemein ersetzen
        //.ToolBar(tb => {
        //    tb.Insert();
        //})
        .DataBinding(b => b.Ajax()
            .Select<WorkitemController>(sc => sc.AjaxGridSelect(Model.fatherKey))
            .Delete<WorkitemController>(sc => sc.AjaxGridDelete(String.Empty)) // Parameter is added by Grid engine
            .Insert<WorkitemController>(sc => sc.AjaxGridInsert())
            .Update<WorkitemController>(sc => sc.AjaxGridUpdate(String.Empty)) // Parameter is added by Grid engine
        )
        .DataKeys(k => k.Add(r => r.workitem.RowKey))
        .Columns(c =>
        {
            c.Command(s =>
            {
            //    s.Select();
                s.Edit();
                //s.Delete();
            }).Width(300);
            c.Bound(r => r.workitem.Title);
            if (Model.viewSprints) c.Bound(s => s.SprintTitle);
            c.Bound(r => r.workitem.RemainingDays).Format("{0}").Width(15).Title("Rem. Days");
            c.Bound(r => r.workitem.RemainingHours).Format("{0}").Width(15).Title("Rem. Hours");
            c.Bound(r => r.workitem.FreeRemainingDays).Format("{0}").ReadOnly(true).Width(15).Title("Free Rem. Days");
            c.Bound(r => r.workitem.FreeRemainingHours).Format("{0}").ReadOnly(true).Width(15).Title("Free Rem. Hours");
            c.Bound(r => r.workitem.Urgent);
            c.Bound(r => r.workitem.Important);
            c.Bound(r => r.workitem.Status);
        })
        .Sortable()
        .Pageable()
        .Groupable()
        .Filterable()
        .Render();

[Frank Michael]

This is the solution:

c.Bound(r => r.workitem.Title);

is illegal.
It must be

c.Bound(r => r.Title);

The reason is, that the Grid seemingly creates an empty instance of r and then workitem is null. It is not clear to me why, but that solves it.