Issue with sending array to action method

Question

I want to send array to my action method:

var items = { 'myIdList[]': [] };

        $(':checkbox').change(function () {            
            $(":checked").each(function () {
                items['myIdList[]'].push($(this).val());
            });
            $('#locationsCheckList').submit();
        });

        $('#locationsCheckList').submit(function () {
            $.ajax({
                url: this.action,
                type: this.method,
                traditional: true,
                data: { "myIdList": items }...

Action method:

[HttpPost]
        public void GetLocations(int[] myIdList)...

items variable have data but when I pass it like this I get null but if I change

data: { "myIdList": items }

with

data: { "myIdList": [1,2,3,4,5] }

it works. When I debug in browser in items variable I have values:

0: "1"
1: "2"
2: "3"

I can't pass array and I don't know why, if it works hardcoded?

do you use fiddler2? Its really good for these situations, you will see exactly the difference between those two situations. Not to mention it makes ajax programming a whole lot easier... fiddler2.com/fiddler2/version.asp — Keith Nicholas
– Keith Nicholas, Commented Jan 24, 2012 at 21:56

Dan A. · Accepted Answer · 2012-01-24 22:08:28Z

1

What if you use a simple array, similar to your example that works:

var items = [];
// your jQuery loop
items.push($(this).val());
// and so on
data: { "myIdList": items }...

answered Jan 24, 2012 at 22:08

Dan A.

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Diodeus - James MacFarlane · Accepted Answer · 2012-01-24 21:56:25Z

0

Your AJAX call needs to include:

dataType: "json",

answered Jan 24, 2012 at 21:56

Diodeus - James MacFarlane

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2 Comments

Diodeus - James MacFarlane Over a year ago

Use Firefox + Firebug, open the NET tab. You can see the details of your request (see if your data is there) as well as the response.

1110 Over a year ago

Now I see wired thing. In firebug I see that 'items' has values (item 0 value 5 etc.) but I have tried to call 'items.length' and I get undefined???

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