Download file from ajax and ActionResult

Question

I want to download files on browser with ajax and ActionResult. The file is downloaded and returned from my ActionResult.

I see the Http query is ok and see the data in the response body. The problem is that the file is not proposed to save in the browser.

All seems good. All that I seen in tutorial and forum were like I done but mine don't word XD. I don't understand what is the difference between mine and the others.

Here is my ActionResult :

public ActionResult ShippingDownloadDNPriority(string SALE_GUID)
{
    int supId = -1;
    int.TryParse(Session["SupId"].ToString(), out supId);
    if (supId < 0)
        return null;

    WebResponse response = CallApi.DownloadAndCreateDN(Session["UserLogin"].ToString(), Session["IdentConnect"].ToString(), SALE_GUID, supId, true);
    Stream responseStream = response.GetResponseStream();

    var cd = new System.Net.Mime.ContentDisposition
    {
        FileName = "myfile.pdf",
        Inline = false,
    };
    Response.Headers.Add("Content-Disposition", cd.ToString());
    Response.ContentType = "application/octet-stream";
    return File(responseStream, System.Net.Mime.MediaTypeNames.Application.Pdf, "myfile.pdf");
}

public static WebResponse DownloadAndCreateDN(string login, string session, string SALE_GUID, int supid, bool priority)
{
    string[] res = new string[2];

    StringBuilder postData = new StringBuilder();
    postData.AppendLine("{");
    postData.AppendLine(string.Format("\"login\":\"{0}\",", login));
    postData.AppendLine(string.Format("\"session\":\"{0}\",", session));
    postData.AppendLine(string.Format("\"saleguid\":\"{0}\",", SALE_GUID));
    postData.AppendLine(string.Format("\"supid\":{0},", supid));
    postData.AppendLine(string.Format("\"prority\":{0}", priority.ToString().ToLower()));
    postData.AppendLine("}");

    ASCIIEncoding ascii = new ASCIIEncoding();
    byte[] postBytes = ascii.GetBytes(postData.ToString());

    string url = Properties.Settings.Default.ISAPIAddress + "deliverynote/create";

    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
    request.Method = "POST";
    request.ContentType = "application/json";
    request.ContentLength = postBytes.Length;

    Stream postStream = request.GetRequestStream();
    postStream.Write(postBytes, 0, postBytes.Length);
    postStream.Flush();
    postStream.Close();

    return request.GetResponse();
}

Here is my javascript :

$.ajax({
    url: '../Shipping/ShippingDownloadDNPriority?SALE_GUID=XXXXXXXXXXXXXX',
    data: { SALE_GUID: DropShipping.GetRowKey(rowIndexSale) },
    async: false,
    //success: function (data) { window.downloadFile = data; }
});

Thanks all

Answer 1

I changed of idea. I simply send my pdf (from my controller) in 64 base and make in the ajax :

success: function (data) {
     window.open("data:application/pdf;base64," + data.data, '_blank'); 
}