如何使用iTextSharp将pdf Byte [] Array转换为可下载文件

Question

嘿伙计我有这个字节数组我想转换为pdf并使其可供下载.任何人都知道如何做到这一点？

这是我的动作控制器

public ActionResult DownloadLabTestResult(string labTestResultID)
{
            PdfReader pdfReader = new PdfReader("Xue_Tang.pdf");

            MemoryStream stream = new MemoryStream();
            PdfStamper stamper = new PdfStamper(pdfReader, stream);

            pdfReader.Close();
            stamper.Close();
            stream.Flush();
            stream.Close();
            byte[] pdfByte = stream.ToArray();

            // So i got the byte array of the original pdf at this point. Now how do i convert this
            // byte array to a downloadable pdf? i tried the method below but to no avail.

            MemoryStream ms = new MemoryStream(pdfByte);

            Response.ContentType = "application/pdf";
            Response.AddHeader("content-disposition", "attachment;filename=labtest.pdf");
            Response.Buffer = true;
            Response.Clear();
            Response.OutputStream.Write(ms.GetBuffer(), 0, ms.GetBuffer().Length);
            Response.OutputStream.Flush();
            Response.End();

            return new FileStreamResult(Response.OutputStream, "application/pdf");

 }

Answer 1

我使用类似的代码,但有一些差异:

Response.Clear();
MemoryStream ms = new MemoryStream(pdfByte);
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition", "attachment;filename=labtest.pdf");
Response.Buffer = true;
ms.WriteTo(Response.OutputStream);
Response.End();

1. 先前调用Reponse.Clear().
2. 使用MemoryStream.WriteTo写入Response.OutputStream.

编辑:对不起,我没有看到你使用的是ASP.NET MVC,上面的代码是在WebForms的aspx页面中.

对于ASP.NET MVC,你不能这么做

return new FileStreamResult(ms, "application/pdf");

？