[Solved] Unable to get selected item on CascadeTo

[Michael Evans]

I'm trying to add a set of cascading combo boxes to my MVC4 application.  However, the problem I'm having is that the controller is not receiving the selected item from the first combo box.  The method is being called, but the parameter is null.  This is what the view looks like:

<p>
        <label for="ComboBox_Flights-input">Flights</label>

        @(Html.Telerik().ComboBoxFor(x => x.SelectedFlightDataId)
            .Name("ComboBox_Flights")
            .BindTo(new SelectList(Model.ValidFlights, "FlightDataId", "LineAndNumber"))
            .CascadeTo("ComboBox_BoardingSequences")
            )

</p>
<p>
        <label for="ComboBox_BoardingSequences-input">Boarding Sequences</label>
        @(Html.Telerik().ComboBoxFor(x => x.SelectedTemplateId)
                .Name("ComboBox_BoardingSequences")
                .DataBinding(binding => binding.Ajax().Select("_GetValidBoardingSequencesForFlight", "BoardingSequence"))
        )
</p>

And here is the code in the controller:

        [HttpPost]
        public JsonResult _GetValidBoardingSequencesForFlight(int? FlightDataId)
        {
// ... snip ...
        }

FlightDataId is my parameter and it comes back null after I select an item from the first combo.  I have looked at your examples and I don't see what I am doing wrong.  Any help would be appreciated.

[Georgi Krustev]

Hello Michael,

 
The key-value pair, which second combobox will send to the server, will be the name of the first combobox "ComboBox_Flights" and its value. Hence the _GetValidBoardingSequencesForFlight method should wait for "ComboBox_Flights", and not for "FlightDataId".

Regards,
Georgi Krustev
the Telerik team

[Michael Evans]

Thanks, Georgi.  Apparently I'm blind because now that I look at the example I can see that is what is done there.  I was looking at the bottom private method which had the parameter name ending with ID.  This worked perfectly.