Blank DataTextField Events Fail

[Craig Tarr]

Using 2011.1.315 I cannot get the ComboBox to update if one of the items has a blank for the Text value. I either receive a g.slice or e.replace JavaScript error.

I would like to have one entry in the ComboBox display a blank for the Text as if nothing was chosen. Right now I have to remove this blank from the list of items to get the control to function. Is there a work around for this?

here's my view:

<%= Html.Telerik().Grid<EntryList>()
            .Name("EntryList")
            .DataKeys(keys =>
            {
                keys.Add(p => p.RaceResultsID);
            })
            .ToolBar(toolbar => {
                toolbar.Insert();
               })
            .DataBinding(dataBinding =>
            {
                dataBinding.Ajax()
                        .Select("_SelectEntryListDrivers", "EntryList")
                        .Update("_UpdateDriver", "EntryList")
                        .Insert("_InsertDriver", "EntryList")
                        .Delete("_DeleteDriver", "EntryList");
            })
            .Columns(columns =>
            {
                columns.Bound(p => p.Name).Width(115);
                columns.Bound(p => p.Car).Width(40);
                columns.Bound(p => p.Manufacturer).Width(75);
                columns.Bound(p => p.Sponsor).Width(175);
                columns.Bound(p => p.Owner).Width(200);
                columns.Command(commands =>
                    {
                        commands.Edit();
                        commands.Delete();
                    }).Width(75).Title("Actions");
                columns.Bound(p => p.PersonID)
                    .ClientTemplate(Html.ActionLink("Person Edit", "Edit", new { area = "util", controller = "Person", ID = "<#= PersonID #>" }, new { target = "_blank", @class = "t-button" }).ToString()).ReadOnly(true).HtmlAttributes("class='t-button'").Title("Utility").Width(75);
                columns.Bound(p => p.RaceResultsID).Width(25).Hidden(true);
                columns.Bound(p => p.DriverEntity).Width(25).Hidden(true);
                columns.Bound(p => p.OwnerID).Width(25).Hidden(true);
                columns.Bound(p => p.NumberID).Width(25).Hidden(true);
                columns.Bound(p => p.SponsorID).Width(25).Hidden(true);
                columns.Bound(p => p.ManufacturerID).Width(25).Hidden(true);
                columns.Bound(p => p.SubSeriesName).Width(5).Hidden(true);
                columns.Bound(p => p.VehicleID).Width(5).Hidden(true);
            })
            .Sortable(sorting => sorting.OrderBy(sortOrder => sortOrder.Add(o => o.Name).Ascending()))
            .Reorderable(reorder => reorder.Columns(true))
            .ClientEvents(events => events.OnSave("onSave"))
            .ClientEvents(events => events.OnEdit("onEdit"))
        %>

The Edit Template for the column "Car". It is a list of numerical values from 0 to 99 along with a blank at the top and "none" at the bottom.

<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl" %>

<%= Html.Telerik().ComboBox()
.Name("Car")
.DataBinding(binding => binding.Ajax().Select("_SelectCarNumbers", "EntryList"))
.AutoFill(true)
.Filterable(filtering => filtering.FilterMode(AutoCompleteFilterMode.StartsWith).MinimumChars(1))
.HighlightFirstMatch(true)
.ClientEvents(events => events.OnDataBinding("onCarDataBinding"))
%>

The Controller for the Template:

[HttpPost]
        public ActionResult _SelectCarNumbers(int eventID)
        {
            var list = _util.GetOwnerNumberListByID(Int32.MinValue, Int32.MinValue, eventID);

            var car = list.AsQueryable();

            return new JsonResult { Data = new SelectList(car.ToList(), "NumberID", "NumberText") };
        }

[Georgi Krustev]

Hello Craig,

 
This is a known issue which is already addressed. The fix is available for the premium support customers. For open-source clients the fix will be available in Q2 2011 release of Telerik Extensions for ASP.NET MVC scheduled for the middle of July. 

All the best,
Georgi Krustev
the Telerik team