Need server side SQL commands for Telerik Listbox Update/Insert/Delete


I'm using 2 listboxes to manage add/reorder/delete of records in a linking table.
Table 1 is the feeder table -Table1.ID, Table1.Descrip fills Listbox1
Table 2 is the linking table - Table2.KeyID, Table1ID, Table3ID, Table2SortOrderInt
Table 3 is the other feeder table - Table3.ID, Table3.Descrip

Since it uses a LinkTable, Telerik's basic drag/drop automatic updates don't support it.  The listbox on left works fine, showing Table1 info.  The listbox2 works fine and refreshes with postbacks but nothing is saved to SQL yet.

I need help writing the code behind,, to commit the changes in Listbox2 please.  Is it something that can be done on Unload each time?


Who is Participating?
Kevin CrossConnect With a Mentor Chief Technology OfficerCommented:

The challenge as you identified is due to the JOIN involved. At least that is what I understood from question that Listbox 2 is based on a combination of the three tables or at least the second two based on the Table1ID selected in first Listbox. What you can do, is create a VIEW on the SQL side representing that data. Then set up an INSTEAD OF triggers for INSERT, UPDATE, and DELETE on the view. The .NET side will see this as simplified case like Table1 and so should be simple to maintain. From the SQL side, see this reference:

BothWorldsJoAuthor Commented:
Didn't know views could do that. Thanks very much!
Kevin CrossChief Technology OfficerCommented:
You are most welcome!
Best regards and happy coding,

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