Get all datas of a DataTable instance, init with server-side

Hi,

I works with DataTable for some time. Since 1 week, I change all my DataTable on a server-side version. This is very powerful and your code is clean to read.

Today I have a problem. I solved it. But it's not the good way!! I will explain my problem :

This following code is my DataTable initialisation. All is fine on this code.
For information I use the selectable rows (but in a reverse way. I select all by default, and the first click on the TR unselected the Row).

var aDatatableUnselected = [];

$('#example').dataTable({
	"bProcessing": true,
       "bServerSide": true,
    "sAjaxSource": "index.php?page=articles&view=raw.articles",
	"sPaginationType": "full_numbers",
	"oLanguage":
	{
		"sUrl": "js/datatables/langs/"+lang+".txt"
	},
	'aLengthMenu':[[15,30,50,100],[15,30,50,100]],
	'iDisplayLength':15,
	'aaSorting':[],
	'aoColumns':[{'bSearchable':false,'bSortable':false},null,{'sType':'html'},null,{'bSearchable':false,'bSortable':false}],
	"fnServerData": function ( sSource, aoData, fnCallback, oSettings )
	{
		oSettings.jqXHR = $.ajax(
		{
			"dataType": 'json',
			"type": "POST",
			"url": sSource,
			"data": aoData,
			"success": fnCallback,
	        "error": function(xhr, error, thrown)
	        {
	        	// function call after a catching error for not use the _fnLog alert, but show the error in a element with the class .dataTables_error (like .dataTables_empty)
	        	oSettings.oInstance.fnServerDataError(xhr, error, thrown)
	        }
		});
	},
    "fnServerParams": function ( aoData )
    {
    	var _values = $('form[name="filtres"]').serializeArray();

		return $.merge(aoData, _values);
    },
    'sDom': '<"top"pl>tr<"bottom"ip>',
    "fnPreDrawCallback" : function( oSettings )
    {
    	var grid = $('.grid-articles');

    	grid = grid.insertBefore(oSettings.nTable);
    	
    	$('#articles-ajax .grid-articles-wrap').empty();
    },
    "fnDrawCallback": function()
    {
    	var grid = $('.grid-articles');
		var tab = $('#example');

    	var empty = tab.find('.dataTables_empty').html();
    	var error = tab.find('.dataTables_error').html();

    	if(empty || error)
    		grid.find('.grid-articles-wrap').html('<div class="text-center padding10">'+(empty ? empty : error)+'</div>');
    },
    "fnRowCallback": function( nRow, aData, iDisplayIndex, iDisplayIndexFull )
    {
    	if ( jQuery.inArray(aData.DT_RowId, aDatatableUnselected) === -1 ) {
               $(nRow).addClass('row_selected');
           }
           
    	$('#articles-ajax .grid-articles-wrap').append(aData.DT_RowGrid);

		$('td:eq(0)', nRow).addClass(aData.DT_ColClass_0);
           return nRow;
    }
});

$('#example tbody tr').live('click', function ()
{
    var id = this.id;
    var index = jQuery.inArray(id, aDatatableUnselected);
     
    if ( index === -1 ) {
        aDatatableUnselected.push( id );
    } else {
        aDatatableUnselected.splice( index, 1 );
    }
     
    $(this).toggleClass('row_selected');
} );

I created a module to export my datas in an excel file. This module use the selectable rows of Datatable. The following code is to active the export module...

$(document).on('click','#export-module_active',function()
{
	var nWrapper = $('#articles');
	var oDataTable = $('#exemple').dataTable();
	var oSettings = oDataTable.fnSettings();
	var iRecordsDisplay = oSettings.fnRecordsDisplay();
	
	var oData = $('form[name="filtres"]').serializeArray();
	oData = $.merge(oDataTable.oApi._fnAjaxParameters( oSettings ), oData);
	oData.push({ name: "iDisplayStart", value: "0" });
	oData.push({ name: "iDisplayLength", value: iRecordsDisplay });
	
	var aArticles = [];

	$.ajax(
	{
		"dataType": 'json',
		"type": "POST",
		"url": oSettings.sAjaxSource,
		"data": oData,
		"success": function(json)
		{
			for(var i = 0; i < iRecordsDisplay; i++)
			{
				// Check if my value is unselected or not
				if ( jQuery.inArray(json.aaData[i].DT_RowId, aDatatableUnselected) === -1 )
				{
               		                aArticles.push({name: "art[]", value: json.aaData[i].DT_Id});
                                }
                        }
            
                        $.ajax({
				 "type":'post',
				"url":'index.php?page=articles&view=ajax.export",
				"data": aArticles,
				"success":function(data)
				{
					nWrapper.prepend('<div id="export-articles"><a id="export-close" href="#"><span>X</span> Close</a>'+data+'</div>');
					
					//...
				}
			});
		},
       	 	"error": function(xhr, error, thrown)
        	{
        		// My logger ...
        	}
	});

	return false;
});

I rewrite in this code fnServerData because I do not have access of this function. I try multiple way to get ALL my rows in the Datatable (in server-side) with :

var nWrapper = $('#articles');
var oDataTable = $('#exemple').dataTable();
var oSettings = oDataTable.fnSettings();
var iRecordsDisplay = oSettings.fnRecordsDisplay();
	
var oData = $('form[name="filtres"]').serializeArray();
oData = $.merge(oDataTable.oApi._fnAjaxParameters( oSettings ), oData);
oData.push({ name: "iDisplayStart", value: "0" });
oData.push({ name: "iDisplayLength", value: iRecordsDisplay });

oSettings.fnServerData.call( oSettings.oInstance, oSettings.sAjaxSource, aoData, null, oSettings);

or (but this way return only the rows show)

oDataTable.fnGetNodes();

...


My question is :

How can I get ALL rows in Datatable in use these functions ? How can I get my fnServerParams (I try the following code but KO) ?

oDataTable.oApi._fnServerParams(oSettings, oDataTable.oApi._fnAjaxParameters( oSettings ));

PS : I can't put on JS Fiddle or DataTables live, because your domain and my domain block the server-side.