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Cascading ComboBox issue in Kendo UI for MVC

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Andrej
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Andrej asked on 23 Apr 2014, 01:49 PM
There is problem with Cascading ComboBox in edit mode. When using for inserting new record – it’s working fine, allowing to choose City and then district in the city selected. When opening record for edit, then Child-ComboBoxFor is empty, although it has value assigned.
It seems that during initialization, Parent-ComboBoxFor reinitializing Child-ComboBoxFor and value is cleared. How to keep value during Edit?
I found some articles that similar issue was fixed in 2012 version and we are using latest version of Kendo UI for MVC.
Code sample is provided below.

Code for Parent-ComboBoxFor:

@(Html.Kendo().ComboBoxFor(model => model.CityId)
    .HtmlAttributes(new { id = Html.IdFor(m => m.CityId).ToString() })
    .DataTextField("CityName")
    .DataValueField("CityId")
    .Filter(FilterType.Contains)
    .DataSource(source =>
    {
        source.Read(read =>
            {
                read.Action(MVC.Object.ActionNames.Cities_Read, MVC.Object.Name);
            });
    })
)

Code for Child-ComboBoxFor:

@(Html.Kendo().ComboBoxFor(model => model.CityAreaId)
    .HtmlAttributes(new { id = Html.IdFor(m => m.CityAreaId).ToString() })
    .Placeholder("Choose area...")
    .DataTextField("Name")
    .DataValueField("Id")
    .Filter(FilterType.Contains)
    .DataSource(source =>
    {
        source.Read(read =>
        {
            read.Action(MVC.Object.ActionNames.GetCascadeCityAreas, MVC.Object.Name).Data("filterCityAreas");
        })
        .ServerFiltering(true);
    })
    .Enable(false)
    .AutoBind(false)
    .CascadeFrom(Html.IdFor(m => m.CityId).ToString())
)<script>
    function filterCityAreas() {
        return {
            cityId: $("#@Html.IdFor(m => m.CityId)").val(),
            cityAreasFilter: $("#@Html.IdFor(m => m.CityAreaId)").data("kendoComboBox").input.val()
        };
    }
</script>

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Vladimir Iliev
Telerik team
answered on 25 Apr 2014, 10:20 AM
Hi Andrej,

I tried to reproduce the problem locally but to no avail – everything is working as expected on our side. Could you please try to modify the following CodeLibrary demo to reproduce the issue and send it back to us? This would help us pinpoint the exact reason for this behavior.

Regards,
Vladimir Iliev
Telerik
 
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ComboBox
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Andrej
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Answers by
Vladimir Iliev
Telerik team
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