How to post an array to mvc controller - arrays

Question

I want to post java script object to mvc controller
$(document).ready(function () {
var table = $('#my_table_1').DataTable({
"paging": true,
"ordering": true,
"info": true,
"search": true,
"pageLength": 100
});
var d = '';
var data3 = table.on('search.dt', function () {
//number of filtered rows
// console.log(table.rows({ filter: 'applied' }).nodes().length);
//filtered rows data as arrays
d = table.rows({ filter: 'applied' }).data()
});
console.log(table.rows({ filter: 'applied' }).data());
$('#excel2').click(function (e) {
//var data3 = table.on('search.dt', function () {
// console.log(table.rows({ filter: 'applied' }).data());
// console.log(data3);
//});
console.log(d);
$.ajax({
url: '/Administrator/TestDownload',
type: 'POST',
data: {data:d},
cache: false
}).done(function (response) {
alert(d);
});
});
});
//Controller code:
public JsonResult TestDownload(String[] data)
{
return Json(data,JsonRequestBehavior.AllowGet);
}
I am getting null in controller as a data parameter
Expected: Want to get data object from view to controller as a parameter in controller.
Actual: Data parameter in controller is null

Answer 1

You must check your d variable correct array format.
I tested in my side with var d = ["test",2,3] and in controller it get correct data.
$('#excel2').click(function (e) {
//var data3 = table.on('search.dt', function () {
// console.log(table.rows({ filter: 'applied' }).data());
// console.log(data3);
//});
d = ["test",2,3]
console.log(d);
$.ajax({
url: '/Administrator/TestDownload',
type: 'POST',
data: {data:d},
cache: false
}).done(function (response) {
alert(d);
});
});
});

Answer 2

An example that works:
var test = ["This", "is", "a", "test"];
$.ajax({
type: "POST",
traditional: true,
url: "Administrator/TestDownload",
data: { array: test }
}
});
The controller(in VB.net):
Function TestDownload(array As String()) As ActionResult
//do something
End Function

Answer 3

Why not try stringifying the data and setting the contentType
$.ajax({
url: '/Administrator/TestDownload',
data: JSON.stringify({data:d}), // use JSON stringify
type: 'POST',
contentType: "application/json; charset=utf-8", //add this
cache: false
}).done(function (response) {
alert(d);
});
});