I am building a SP app in VS2012 and need a content type field to show a dropdown choice list with items from a list within the app itself. To keep thing simple:
- List1 has a FieldX column with values A, B and C. But this might become more values or less values once the app is in use.
- DocLib1 is a document library which uses a obligatory ContentType1. FieldX is a field in ContentType1 and when adding a document to DocLib1 the user should have dropdownlist A, B, C values to choose from (or whatever values are in FieldX column of List1 at that moment.
How can I achieve this? I really have no clue where to start.... All help will be highly appreciated!!!