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Listbox Reordering

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ListBox
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Owen
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Owen asked on 18 Apr 2018, 01:51 PM

Hi, 
I hope someone can help me with is. I used the basic usage example (from the demo page) and built upon this to be able to read data from my database and then capture both lists in my controller. List two works as expected, however when re-ordering list one, the list item index remains the same. 

View

@(Html.Kendo().ListBox()
                            .Name("RegionOne")
                            .DataValueField("Id")
                            .DataTextField("Name")
                            .DataSource(source => source
                                    .Read(read => read.Action("_GetAvailableDashboardItems_ListOne", "Home"))
                            )
                            .Toolbar(toolbar =>
                            {
                                toolbar.Position(Kendo.Mvc.UI.Fluent.ListBoxToolbarPosition.Right);
                                toolbar.Tools(tools => tools
                                    .MoveUp()
                                    .MoveDown()
                                    .TransferTo()
                                    .TransferFrom()
                                    .TransferAllTo()
                                    .TransferAllFrom()
                                //.Remove()
                                );
                            })
                            .Events(events => events
                                .Reorder("test")
                            )
                            .ConnectWith("RegionTwo")
                            .BindTo(Model.RegionOne)
                        )
 
                        @(Html.Kendo().ListBox()
                            .Name("RegionTwo")
                            .DataValueField("Id")
                            .DataTextField("Name")
                            .DataSource(source => source
                                    .Read(read => read.Action("_GetAvailableDashboardItems_ListTwo", "Home"))
                            )
                            .BindTo(Model.RegionTwo)
                            .Selectable(ListBoxSelectable.Multiple)
                            .ConnectWith("RegionOne")
                        )

 

Controller

public JsonResult _GetAvailableDashboardItems_ListOne()
        {
            var items = _userTask.GetAvailableDashboardItems(CurrentUserId, false);
            return Json(items, JsonRequestBehavior.AllowGet);
        }
 
 public JsonResult _GetAvailableDashboardItems_ListTwo()
        {
            var items = _userTask.GetAvailableDashboardItems(CurrentUserId, true);
            return Json(items, JsonRequestBehavior.AllowGet);
        }

 

Task 

public IEnumerable<AvailableDashboardItems> GetAvailableDashboardItems(string userId, bool Region)
        {
            var userItems = _userRepository.GetUserDashboardItems(userId);
            if (userItems.Count() != 0)
            {
                var items = userItems.Where(x => x.Region == Region).OrderBy(x => x.Position);
                return Mapper.Map<IEnumerable<UserDashboardItem>, IEnumerable<AvailableDashboardItems>>(items);
            }
            else
            {
                if (!Region)
                    return Mapper.Map<IEnumerable<DashboardItem>, IEnumerable<AvailableDashboardItems>>(_userRepository.GetAvailableDashboardItems());
            }
            return null;
        }

 

Any help would be greatly appreciated, Thanks 

Rich

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Stefan
Telerik team
answered on 20 Apr 2018, 05:34 AM
Hello, Rich,

Thank you for the details.

This is expected as the ListBox will not automatically update the dataSource indexes of the reordered items by design.

We have an article demonstrating how the indexes can be updated on the reorder event:

https://docs.telerik.com/kendo-ui/knowledge-base/list-box-reordering-not-working

I hope this is helpful.

Regards,
Stefan
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Stefan
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