How to populate select box based on value from another select

[Gowher Naik]

I have two select box on a web page.On selecting value from first select box i have to populate 2nd select.The values for 2nd select box comes from database.I am not able to understand how i will do it using struts1.if anyone has any link please post here.

Thanks

[arulk pillai]

You mean value for the first select box comes from the database. To populate your second select box from the first, you may have to use java script or some rich component like richfaces.
[ August 15, 2008: Message edited by: arulk pillai ]

[Gowher Naik]

I have a hardcoded values in first select box.The user will choose some value from first select box and based on values from first select box i have to populate the 2nd selectbox for user.The values for 2nd selectbox comes from database.Both selectbox's are on same web page.

[Shawn Montague]

You should be able to do this with Ajax and a little Javascript. You can create/delete select box elements on-the-fly...the Ajax will help you query the database without a reload.

This assumes you are not trying to populate the select box with 100's of options.

[Bear Bibeault]

Originally posted by arulk pillai:
or some rich component like richfaces.

Talk about using atomic bombs to crack walnuts!

This is one of the most common Ajax examples you could think of. It has been discussed many times in the HTML forum and there are examples all over the web. Search for "dependent" or "cascading" dropdowns.

[Gowher Naik]

Can we solve above problem without using AJAX?

[Jeanne Boyarsky]

Originally posted by Gowher Naik:
Can we solve above problem without using AJAX?

If there are a small number of values in the second box, you could store them all on the page using a JavaScript map and loop through the map to populate the list when each element is selected. This only works for a relatively small number of combinations since you don't want to make the page download huge.

[Kanchan Singh]

Hi

If you dont want to use ajax then second selct box can be filled by reloading your jsp page again with new values.
i.e
Initially 1 select box with values and 2nd empty
on select of option in 1st select box submit your jsp page and reload same page with values in 2nd select box.

But why you dont want to use AJAX any specific reasons.