lets say i have 3 tables: "A", "AB" and "B" with many to many FK's
A = "A.Id", "A.Name"
AB = "AB.Id", "AB.AId", "AB.BId"
B = "B.Id", "B.Role"
now i want to create an Add Page for "A" with a dropdown multiselect from "B".
dropdown should show all Roles from B and the selected B.Id's and the A.Id should be bind together in "AB.AId" and "AB.BId".
I tried implementing your solution here but cannot do the map at step 3...
|Error|CS1061|'IQueryable' does not contain a definition for 'map' and no accessible extension method 'map' accepting a first argument of type 'IQueryable' could be found (are you missing a using directive or an assembly reference?)
Without the map I am getting issues with casting the FormRef icollection (from getForm used as the drop down data) to the FormRef iqueryable.
I am using a datasource method to pull in the table then assigning this using set property with a linq select. This produces a <long?> which does not work with the multiselect dropdown value being <long>. How can I force the two to work together?.