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5 Cascading Dropdowns (Parent to Child and Child to Parent)

42 New Member
Simple and blunt: my cascading dropdownlists clear when a postback occurs. Does anyone know a quick way around that?

For more information, read on...

I have 5 dropdown lists that define a training class location and line of business: Site, Parent Client, Client, Program, Project.

I'm trying to build cascading dropdownlists that can work from any direction (i.e. select a site and all other lists are filtered by site...select a project and all other dropdown lists are filtered by project). I've built the SQL Select statement behind the lists that filters (accurately).
Aug 26 '10 #1
3 1503
Frinavale
9,735 Recognized Expert Moderator Expert
Are you calling the DropDownList's DataBind method (or otherwise re-populating the lists) in the Page Load method?
Aug 26 '10 #2
Marknut
42 New Member
No, but all of the dropdowns have autopostback set to true so they will databind once another dropdown has changed.
Aug 26 '10 #3
Marknut
42 New Member
I just wanted to post an answer.
  1. I dimed public variables
  2. Set those variables as the dropdownlist.selectedvalues on page_load (If ispostback then...)
  3. Set the dropdownlist.selectedvalue as the variables on the ddl databound
Aug 31 '10 #4

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