Question

是否可以合并pdf文件而不将其保存到磁盘？

我有一个生成的pdf（通过itextsharp）和一个物理pdf文件。这两个应该显示为浏览器合并。

我目前拥有的是（伪代码）

public ActionResult Index()
{
  // Generate dyanamic pdf first
  var pdf = GeneratePdf();
  // Then save it to disk for retrieval later
  SaveToDisc(pdf);
  // Retrieve the static pdf
  var staticPdf = GetStaticPdf();
  // Retrieve the generated pdf that was made earlier
  var generatedPdf = GetGeneratedPdf("someGeneratedFile.pdf");
  // This creates the merged pdf
  MergePdf(new List<string> { generatedPdf, staticPdf }, "mergedPdf.pdf");

  // Now retrieve the merged pdf and show it to the browser
  var mergedPdf = GetMergedPdf("mergedPdf.pdf");

  return new FileStreamResult(mergedFile, "application/pdf");
}

这样可行，但我只是想知道是否可以合并pdf并将其显示到浏览器而不在光盘上保存任何内容？

非常感谢任何帮助。感谢

Answer 1

您可以尝试使用PdfWriter类和MemoryStream，如下所示：

using (MemoryStream ms = new MemoryStream())
{
    Document doc = new Document(PageSize.A4, 60, 60, 10, 10);
    PdfWriter pw = PdfWriter.GetInstance(doc, ms);
    //your code to write something to the pdf
    return ms.ToArray();
}

您还可以参考：Creating a PDF from a RDLC Report in the Background

此外：如果data是内存中的PDF，则需要data.CopyTo(base.Response.OutputStream);

Answer 2

试试这个

    string path = Server.MapPath("Yourpdf.pdf");
    WebClient client = new WebClient();
    Byte[] buffer = client.DownloadData(path);

    if (buffer != null)
    {
        Response.ContentType = "application/pdf";
        Response.AddHeader("content-length", buffer.Length.ToString());
        Response.BinaryWrite(buffer);
    }

生成pdf而不将其保存到磁盘，然后将其显示给浏览器

2 个答案: