Re: Navigating JSON sub-arrays dynamically

Instead of pulling all the data at once I would suggest a series of Ajax
calls. So when someone chooses Ford from the first drop down you issue a
request to the database for all Ford models. If they choose another
manufacturer then go get those and replace the ones that were there with
the new ones. This is a very easy and straight forward approach to take
and execute.


Thanks
Bryce Martin
Programmer/Analyst I
570-546-4777



Paul Holm <pholm@xxxxxxxxxxxxxxxxx>
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Re: [WEB400] Navigating JSON sub-arrays dynamically






Hi Mike,

Does ASP/.net provide a reusable component to handle this "parent/child"
drop down list challenge or do you have to code for each occurance?
This "parent/child" pattern is common in a lot of business apps we run
into. (IE Select a car mfg such as Ford or GM, then based on the
parent, show the models (F150, Explorer)

Thanks, Paul



Mike Wills wrote:

I figured it out finally! I found this:

http://inderpreetsingh.com/2010/10/14/javascriptjson-find-index-in-an-array-of-objects/

<

http://inderpreetsingh.com/2010/10/14/javascriptjson-find-index-in-an-array-of-objects/

The
problem with Kevin's solution is that the IDs will not be sequential or

they

can change.

From there these are the two lines that work:

var i = findIndexByKeyValue(jsonRequestType, "Id", key);
$.each(jsonRequestType[i].HourTypeCodes, function(i, item) {

--
Mike Wills
http://mikewills.me