I'm pretty new to the Ignite UI suite and I'm trying to tie 2 combo boxes together. I have the 2 combo boxes filling correctly with data, but as I'm looking for examples of how to tie the parent combo box to the child, all of the examples I see have this type of syntax:

$("#comboTown").igCombo({                 valueKey: "valTown",                 textKey: "textTown",                 dataSource: dsCascTowns,                 parentComboKey: "keyDistirct",                 parentCombo: "#comboDistrict"             });

Previously I had the following syntax when creating my combo:

@(Html.Infragistics().Combo(

"carrierServiceDropdown", Model.CarrierServices.AsQueryable())

                        .ValueKey(

"CarrierService_Id")

                        .TextKey(

"CarrierService_Name")

                        .DataBind()

.FilteringType(

ComboFilteringType.Local)

                        .RenderMatchItemsCondition(

ComboRenderMatchItemsCondition.StartsWith)

                        .FilteringCondition(

"startsWith")

                        .AutoComplete(

true)

                        .DropDownWidth(300)

                        .Width(

"300")

                        .Render()

How do I specify the parent combo key and id in this syntax? I was expecting to just add a .ParentComboId and set it like that, but it's not available. The only thing I see is the CascadingSettings, but I am not sure what I need to pass to that.