Question

Getting column names from arrayCollection

Asked by: Plucka

I wish to loop over an array collection and access all the elements (columns)

so the arrayCollection looks like

[1].columnOne
[1].columnTwo
[1].columnThree
[2].columnOne
[2].columnTwo
[2].columnThree

I need to loop over the rows and columns, but dont know the column names, any ideas.

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Asked On
2008-11-06 at 10:56:17ID23882784
Tags

ActionScript

Topics

ActionScript

,

Adobe Flex

Participating Experts
2
Points
500
Comments
4

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Answers

 

by: Jones911Posted on 2008-11-06 at 15:50:11ID: 22900894

Try this:

It worked in AS2 and it wont work for bindable properties but it works for simple objects.

for (var key:String in object)
{
    data = object[key] ;
}

where object is your arraycollection item ie ac[0]

 

by: PluckaPosted on 2008-11-06 at 15:51:57ID: 31514055

Cool, I tried that but must have had something wrong.

 

by: papalphaPosted on 2009-01-19 at 09:44:08ID: 23412805

I'm a novice at Flex, ActionScript, and object oriented programming in general.  I'm trying to have a multi-dimension array (arrayCollection) (2 dimension) and want to access the column data using the first dimension (row pointer) (which is a string) as variable to point to the other  columns in the array.  I currently have:
private function getArrayDataValue(currentArray:ArrayCollection,fieldLabel:String):String {
var key:String = fieldLabel;
var displayValue:String = currentArray[key].data;
return displayValue;
}
I am getting the following error on execution:
Error: Unknown Property: 'freightTerms'.
      at mx.collections::ListCollectionView/http://www.adobe.com/2006/actionscript/flash/proxy::getProperty()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\collections\ListCollectionView.as:694]
      at com.olt.transportation.update::UpdateFullView/getArrayDataValue()[C:\adobeFlexTraining\_workspace\FlexBuilder\src\com\olt\transportation\update\UpdateFullView.mxml:55]
      at <anonymous>()[C:\adobeFlexTraining\_workspace\FlexBuilder\src\com\olt\transportation\update\UpdateFullView.mxml:70]

The code calling the function is:
<mx:Label id="freightTerms" text="{getArrayDataValue(updateTR,'freightTerms')}"/>

Any reasonable suggestion will be greatly appreciated.

 

by: Jones911Posted on 2009-01-19 at 09:50:41ID: 23412875

An arrayCollection is not really a multidimetional array.  Its an array of Objects.

Also to access arrayCollection elements you must use

myArrayColelction.getItemAt(position);

you cant do myArrayColelction[1]

20120131-EE-VQP-002

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