从内存中打开PDF文档 [英] opening PDF document from memory

问题描述

可以使用iTextSharp在内存中创建PDF文档，让用户可以选择打开或保存？如果打开则会在浏览器窗口中打开。

目前我唯一将它保存到磁盘。

编辑：

<好吧，我已经怀疑了。我最终不得不将文件写入文件夹，但它只是暂时的，因为每次都被覆盖。以下是它的价值解决方案：

  private void GeneratePDF（）{$​​ b 
 $ b var doc1 =新文件（）; 
 string path = Server.MapPath（〜/ pdfs /）; 
 string filepath = path +Doc1.pdf; 
 PdfWriter.GetInstance（doc1，new FileStream（filepath，FileMode.Create））; 
 
 doc1.Open（）; 
 doc1.Add（新段落（新文件））; 
 doc1.Add（new Paragraph（DateTime.Now.ToString（）））; 
 
 doc1.Close（）; 
 
 Response.Buffer = false; // transmitfile self buffers 
 Response.Clear（）; 
 Response.ClearContent（）; 
 Response.ClearHeaders（）; 
 Response.ContentType =application / pdf; 
 Response.AddHeader（Content-Disposition，attachment; filename = myPDF.pdf）; 
 Response.TransmitFile（filepath）; 
 Response.End（）; 
  

}

解决方案

您可以将PDF保存到内存流并将其写入浏览器，如下所示。

  protected void Page_Load （对象发送者，EventArgs e）
 {
 MemoryStream ms; 
 
 using（ms = new MemoryStream（））
 {
 PdfWriter writer = PdfWriter.GetInstance（myPdfDoc，ms）; 
 
 Response.ContentType =application / pdf; 
 Response.OutputStream.Write（ms.GetBuffer（），0，ms.GetBuffer（）。Length）; 
 Response.OutputStream.Flush（）; 
 Response.OutputStream.Close（）; 
 
} 
} 
  

It is possible to create a PDF document in memory with iTextSharp that gives the user a choice to "open" or "save"?, and if it opens then it opens in a browser window.

At the moment the only I have save it to disk.

EDIT:

ok I've got it sussed. I did end up having to write the file to a folder, but it is only temporary as gets overwritten every time. Here is the solution for what it's worth:

private void GeneratePDF() {

    var doc1 = new Document();
    string path = Server.MapPath("~/pdfs/");
    string filepath = path + "Doc1.pdf";
    PdfWriter.GetInstance(doc1, new FileStream(filepath, FileMode.Create));

    doc1.Open();
    doc1.Add(new Paragraph("A new Document"));        
    doc1.Add(new Paragraph(DateTime.Now.ToString()));

    doc1.Close();

    Response.Buffer = false; //transmitfile self buffers
    Response.Clear();
    Response.ClearContent();
    Response.ClearHeaders();
    Response.ContentType = "application/pdf";
    Response.AddHeader("Content-Disposition", "attachment; filename=myPDF.pdf"); 
    Response.TransmitFile(filepath);
    Response.End();

}

解决方案

You could save the PDF to a memorystream and write it out to the browser like this.

protected void Page_Load(object sender, EventArgs e)
{
    MemoryStream ms;

    using (ms = new MemoryStream())
    {
       PdfWriter writer = PdfWriter.GetInstance(myPdfDoc, ms);

       Response.ContentType = "application/pdf";
       Response.OutputStream.Write(ms.GetBuffer(), 0, ms.GetBuffer().Length);
       Response.OutputStream.Flush();
       Response.OutputStream.Close();

    }
}

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