How to load Partialview via Javascript

Question

I have an Asp.Net MVC project where there is a method that returns a PartialView:

[HttpPost]
public ActionResult MinhaAction(int param1, int param2)
{
   // ...
   // Código
   // ...

   MigraDoc.DocumentObjectModel.Document doc = new MigraDoc.DocumentObjectModel.Document();
   DocumentRenderer renderer = new DocumentRenderer(doc);
   PdfDocumentRenderer pdfRenderer = new PdfDocumentRenderer();
   pdfRenderer.PdfDocument = outPdf;
   pdfRenderer.DocumentRenderer = renderer;

   MemoryStream ms = new MemoryStream();

   pdfRenderer.Save(ms, false);
   byte[] buffer = new byte[ms.Length];
   ms.Seek(0, SeekOrigin.Begin);
   ms.Flush();
   ms.Read(buffer, 0, (int)ms.Length);

   PdfFormatOptions pfo = ExportOptions.CreatePdfFormatOptions();
   pfo.CreateBookmarksFromGroupTree = true; //habilita tree

   return PartialView("PrintPdf", ms);
}

My Partialview PrintPdf is like this:

@using myProject.Enumerator
@model Stream

@{

    var file = Model.ToArray();
    Response.Clear();
    Response.ClearContent();
    Response.AddHeader("Content-Length", file.Length.ToString());
    Response.AddHeader("Content-Disopsition", "filename=" + ViewBag.FileName);
    Response.ContentType = "application/pdf";
    Response.BinaryWrite(file.ToArray());
}

As you can see, I am wanting to return a PDF to the View where I have the following Ajax:

<div id="conteudo-pdf" style="display:none;width:790px;height:590px;"></div>

// ...

 $.ajax({
     beforeSend: function () {
          LoadStart();
     },
     complete: function () {
          LoadStop();
     },
     contentType: 'application/json, charset=utf-8',
     dataType: 'json',
     type: 'POST',
     url: '@Url.Action("MinhaAction", "MeuController")',
     data: JSON.stringify(
         {
             param1: 1,
             param2: 2
         }),
     success: function (data) {
             $("#conteudo-pdf").empty();
             ShowDialog("Title", "#conteudo-pdf", "1024", "660");
             $("#conteudo-pdf").html(data);
         },
    timeout: 420000,
    fail: function (jqXHR, textStatus) {
             if (textStatus === 'timeout') {
                   alert('Failed from timeout');
             }
             alert("Error 007")
     }
});

// ...

function ShowDialog(title, idDiv, largura, altura) {
    $(idDiv).dialog({
        title: title,
        resizable: false,
        width: largura,
        height: altura,
        modal: true,
        position: 'center',
        buttons: [{
            text: Resources.Fechar,
            click: function () {
                $(idDiv).attr("title", "");
                $(this).dialog("close");
            }
        }]
    }).css("font-size", "10px").fadeIn("slow");

    ValidaForm();
}

Unfortunately it has not worked, because the variable data always comes null. I’ve tried to send the pdf as base64, but by having many graphic details, ends up crashing the browser. I need something light and simple but that keeps my Action as POST.