DataTable Selected Row Checkbox Ids Not Working Properly

Question

below is my datatable

 

 

 

When i Selected 2 rows it displays ids

using below code

$("#btn").on("click", function () {

debugger;

var id = $('#myDataTable2 input[type="checkbox"]:checked').map(function () {

return $(this).val();

}).get();

alert(id);

if (id.length === 0) {

swal('', 'Please Select Question', 'warning');

}

});

 

But When i Clicked To Second Page Using Pagination Then it not Get Ids