Sharepoint is quite limited when it comes to multi-Lookups because it saves that information in strings. So I changed the Page-Property
“Elements (MultiLookup-> elementIds” on the propertyPage
to an inserted List “PageElements”:
“
(SingleLookup)pageId , (singleLookup) elementId”
Because this is quite hard to maintain for my content admins I want that they can enter that information in the page properties like before instead of adding lines into “PageElements”
Therefore I want to add a control that handles that.
I do not need a solution for the task how to achieve that specific function, but a general hint how to add any custom control into a Page property.
I starting point link would be very nice. I just doen’t seem to find the right words to feed google with my topic.
Solved this by using a custom field type with that logic. Basicly Described here: http://avinashkt.blogspot.de/2011/07/creating-custom-field-in-sharepoint.html