Home > ActionScript, Adobe, Combo Box, Flex > Action script Date Data Provider

Action script Date Data Provider

I had a requirement to show 2 drop downs for From and To selection of months and year, values like this:

Jan, 2010
Feb, 2010 and so on

And I used the following class to get this working like this.

Based on the class from

public function getListOfMonthsAndYear(date:Date,noOfMonths:int = 12):ArrayCollection
var monthArr:ArrayCollection = new ArrayCollection();
var obj:Object = new Object();
var dt:Date = new Date();
//Fixed it on the basis of Matt’s comments, see below – comment section (Thx Matt)
// This because the above utility can’t handle 31 days, so forcing it to start of the day
date = new Date(date.getFullYear(),date.getMonth(),1);
dt = new Date(dt.getFullYear(),dt.getMonth(),1);
var n:int = 0;
for (var i:int = noOfMonths; i >= 0; i–)
dt = DateUtils.dateAdd(DateUtils.MONTH,-i, date);
obj = new Object();
obj[‘label’] = DateUtils.dateFormat(dt,’MMM YYYY’);
obj[‘data’] = DateUtils.dateFormat(dt,’YYYYMM’);
obj[‘no’] = n;
return monthArr;

Then I created filtering on the second drop down to remove all the entries which are not relevent, like if you select in your From combo, say Month March, 2010 then you don’t want user to select Jan, 2010 in To combo as that would be wrong.

Here is the filter I created on Array Collection:

* From Month Change Handler
private function onFromMonthChange(event:Event):void
var comboBox:ComboBox = null;

comboBox = event.currentTarget as ComboBox;
this.currFromMonthNo = Number( comboBox.selectedItem.no );
this.monthToDP.filterFunction = this.toMonthFilter;
if (this.monthToDP.length > 0) this.monthsTo.selectedIndex = 0;
this.criteria.monthFrom = this.monthsFrom.selectedItem.data;
this.criteria.monthTo = this.monthsTo.selectedItem.data;

private function toMonthFilter(obj:Object):Boolean
return Number(obj.no) >= this.currFromMonthNo;

Actually I used a trick to store number starting from 1 to end of the list in both collections and removed the items with the no’s above the selected one from To combo list


Categories: ActionScript, Adobe, Combo Box, Flex
  1. October 31, 2012 at 12:20 pm

    Thanks Matt, yes I realised, the problem is when the day is end of month, it screws up the month, weird, now I have fixed the code and fix the post as well.



  2. Matt
    October 31, 2012 at 11:02 am

    Hi Phil doesn’t work for October 31st 2012

    if you do this:

    var dt:Date = new Date();
    date = new Date(date.getFullYear(),date.getMonth(),1);
    dt = new Date(dt.getFullYear(),dt.getMonth(),1);


    • October 31, 2012 at 12:25 pm

      Thanks Matt

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