[jquery] Post an object as data using Jquery Ajax

My code that I tried is as follows:

var dataO = new Object();
dataO.numberId = 1;
dataO.companyId = 531;

$.ajax({
 type: "POST",
 url: "TelephoneNumbers.aspx/DeleteNumber",
 data: "{numberId:1,companyId:531}",
 contentType: "application/json; charset=utf-8",
 dataType: "json",
 success: function(msg) {
 alert('In Ajax');
 }
});

I would like to pass the object dataO as the ajax data, how can I do it?

Just pass the object as is. Note you can create the object as follows

var data0 = {numberId: "1", companyId : "531"};

$.ajax({
 type: "POST",
 url: "TelephoneNumbers.aspx/DeleteNumber",
 data: dataO,
 contentType: "application/json; charset=utf-8",
 dataType: "json",
 success: function(msg) {
 alert('In Ajax');
 }
});

UPDATE seems an odd issue with the serializer, maybe it is expecting a string, out of interest can you try the following.

data: "{'numberId':'1', 'companyId ':'531'}",

Is not necessary to pass the data as JSON string, you can pass the object directly, without defining contentType or dataType, like this:

$.ajax({
    type: "POST",
    url: "TelephoneNumbers.aspx/DeleteNumber",
    data: data0,

    success: function(data)
    {
        alert('Done');
    }
});

All arrays passed to php must be object literals. Here's an example from JS/jQuery:

var myarray = {};  //must be declared as an object literal first

myarray[fld1] = val;  // then you can add elements and values
myarray[fld2] = val;
myarray[fld3] = Array();  // array assigned to an element must also be declared as object literal

etc...`

It can now be sent via Ajax in the data: parameter as follows:

data: { new_name: myarray },

php picks this up and reads it as a normal array without any decoding necessary. Here's an example:

$array = $_POST['new_name'];  // myarray became new_name (see above)
$fld1 = array['fld1'];
$fld2 = array['fld2'];
etc...

However, when you return an array to jQuery via Ajax it must first be encoded using json. Here's an example in php:

$return_array = json_encode($return_aray));
print_r($return_array);

And the output from that looks something like this:

{"fname":"James","lname":"Feducia","vip":"true","owner":"false","cell_phone":"(801) 666-0909","email":"[email protected]", "contact_pk":"","travel_agent":""}

{again we see the object literal encoding tags} now this can be read by JS/jQuery as an array without any further action inside JS/JQuery... Here's an example in jquery ajax:

success: function(result) {
console.log(result);
alert( "Return Values: " + result['fname'] + " " + result['lname'] );
}

[object Object] This means somewhere the object is being converted to a string.

Converted to a string:

//Copy and paste in the browser console to see result

var product = {'name':'test'};
JSON.stringify(product + ''); 

Not converted to a string:

//Copy and paste in the browser console to see result

var product = {'name':'test'};
JSON.stringify(product);

You may pass an object to the data option in $.ajax. jQuery will send this as regular post data, just like a normal HTML form.

$.ajax({
    type: "POST",
    url: "TelephoneNumbers.aspx/DeleteNumber",
    data: dataO, // same as using {numberId: 1, companyId: 531}
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: function(msg) {
        alert('In Ajax');
    }
});