Hi there… i am still using old version Infragistics ASP.Net 2015.1 via MVC on VS 2015…
sample:

settings.ColumnSetting().ColumnKey("CID").Required(false).ReadOnly(false)
                            .EditorType(ColumnEditorType.Combo)
                            .ComboEditorOptions(co => co.DataSource(companies).ID("CIDCombo").ValueKey("CO").TextKey("CO").Mode(ComboMode.DropDown).EnableClearButton(false)
                            .MultiSelectionSettings(ms => ms.Enabled(true).ShowCheckBoxes(true).ItemSeparator(","))
                            .DropDownOrientation(ComboDropDownOrientation.Bottom)
                        )

so, my db-table field CID (comma delimited string values) would require to bind to this combo editor with multi selection capability…  however, i cannot get the API required per your javascript sample…  please, advise if it's because either the version I have is too old or because I might be missing any references…  if you have a sample for my situation i will appreciate it…

Note: I want to stick to the MVC way if possible…