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POZip file not downloading after zip was correctly filled but contentlength is empty
 

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    <p>On my page I currently have the following: a webgrid with some invoices, for every invoice I have a checkbox, for every invoice I have a pdf-Icon to view the pdf in the browser or to download the pdf.</p> <p>What I'm trying to accomplish is that the user has the possibility to check some invoices and hit the button below to download these invoices as a ZIP file. </p> <p>When the button is clicked an jquery function is called, this function makes an AJAX-call to my ASP.net. I pass an arrayparameter of the corresponding ID's of the invoice.</p> <h2>jQuery - Ajax-call</h2> <pre><code>$("#download").click(function () { var idArray = []; $("input[type=checkbox]").each(function () { if (this.checked) { idArray.push($(this).val()); } }); $.ajax({ traditional: true, type: "GET", url: "/Invoices/downloadInvoices", data: { idArray: idArray }, error: function () { alert("error"); } }).done(function (data) { console.log("succes download function"); }); }); </code></pre> <p>This function works as expected, in my controller I receive the array. The next step is to get the corresponding files (base64 from database) convert these files and put these file into the ZIP. This works aswell, when i check the entries of the ZIP it has the right content.</p> <h2>Controller</h2> <pre><code> public ActionResult downloadInvoices(string[] idArray) { MemoryStream outputStream = new MemoryStream(); outputStream.Seek(0, SeekOrigin.Begin); using (ZipFile zip = new ZipFile()) { foreach (string id in idArray) { string json = rest.getDocumentInvoice(Convert.ToInt32(id)); byte[] file = json.convertJsonToFile(); zip.AddEntry("invoice" + id + ".pdf", file); } zip.Save(outputStream); } outputStream.WriteTo(Response.OutputStream); Response.AppendHeader("content-disposition", "attachment; filename=invoices.zip"); Response.ContentType = "application/zip"; //return File(outputStream, "application/zip", fileDownloadName:"invoices.zip"); -- DIDN'T WORK return new FileStreamResult(outputStream, "application/zip") { FileDownloadName = "invoices" }; } </code></pre> <p>The last step I need is that the user sees the popup to save the zip-file but this doesn't happen. When I check my debugger the ajaxcall is completed succesfully. When I check the debugger (headers) I see the request but the response headers shows contentlength : 0.</p> <p>What am I missing, couldn't find any solution on the net. Hope u can help me.</p> <p>Thanks in advance</p> <h2>EDIT</h2> <p>{ FileDownloadName = "invoices" }</p> <p>When this piece of code is deleted my contentlength isn't 0 anymore. But how can this file now be downloaded? The content the request is sending looks like the file but the popup to download the file isn't showing. </p>
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