I am currently using 3 drop down lists (with objectdatasources) to enable my users to select/filter thru Report Topics - Report Sub-Topics - Report Sub-Topic Details. I am also currently using validation (requiredfield) to make sure that if a drop down list is enabled, a selection must be made by the user before these selections are saved into a database.
This method works for me but is somewhat slow. While looking for a quicker method for this I came across using the AJAX CascadingDropDown extender. This seems to be the way to go HOWEVER I can not seem to get validation to work on the second 2 drop downs. So here are my questions:
1. Is there a "native" way to validate a CascadingDropDown? If not, how is it done?
2. Is there a better way of getting a SelectedValue from the CascadingDropDown? Now I get something like "23:::Selected Report Topic:::".
3. Finally - is using the CascadingDropDown extender the best tool for this task - giving the end user the ability to filter down selections and then saving them to a database?
Any insight here would be appreciated.
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