Hello Martin,

Thank you for your feedback. Our Dev Team will have it in mind if this idea is going to be implemented.

Regards,
Anton Mironov
Progress Telerik

Hello,

While the Kendo UI ListBox does not have the necessary bindings, it is possible to use it as an editor with the following approach which will bind the Locations thanks to the data_bind attribute and will act in the same way as MultiSelectFor(x=>x.Locations) including saving the new collection in the model.Location property and posting it together with the full model on update:

 .Columns(columns =>
{     // grid column bound to a collection
      columns.Bound(p => p.Locations).ClientTemplate("#= getTemplate(data) #");


// Custom popup editor contains the Locations Listbox
@(Html.Kendo().ListBox()
  .Name("Locations")
  .DataValueField("Id")
  .DataTextField("Name")
  .ConnectWith("Available")
  .HtmlAttributes(new { data_bind = "source:Locations" })
  .Selectable(ListBoxSelectable.Multiple)
)


function getTemplate(data) {
        if (data.Locations.length) {
            var template = "<ul>";
            $.each(data.Locations, function (idx, location) {
                template += "<li>" + location.Name + "</li>"
            });
            template += "</ul>";
            return template;
        }
        return "";

    }

I am attaching a runnable project here, just include a reference to the Kendo.Mvc.dll, build and run.

The same project is also available for ASP.NET Core here:

https://github.com/telerik/ui-for-aspnet-core-examples/blob/master/Telerik.Examples.Mvc/Telerik.Examples.Mvc/Views/Grid/ListBoxAsEditor.cshtml

Kind Regards,
Alex Hajigeorgieva
Progress Telerik