打印PDF使用iTextSharp的创建

问题描述

我的目标是打印的客户机上的RDLC报告没有preVIEW。因为它需要ActiveX对象的安装，也有对没有任何权限，我不能使用的ReportViewer打印按钮。所以，我使用iTextSharp的创建从渲染LocalReport返回的字节数组一个PDF，并添加JavaScript打印。

My Goal is to print a RDLC report on the client machine without preview. I can not use the ReportViewer print button since it requires the installation of ActiveX object and there are no permissions for that. So, I'm using ITextSharp to create a PDF from the byte array returned from the rendered LocalReport, and add a JavaScript for print.

调试过程中，我可以看到生成的PDF，具有2页，并且一切看起来OK。我没有收到任何错误和函数退出确定，但它不打印。我在做什么错了，还是我缺少什么？

During Debug, I can see that the PDF is generated and has 2 pages, and everything looks OK. I don't receive any errors and the function exits OK, but it doesn't print. What am I doing wrong, or what am I missing?

这是我的code：

string jsPrint = "var pp = this.getPrintParams();pp.interactive= pp.constants.interactionLevel.silent;this.print(pp);";

byte[] bytes = report.Render("PDF", null, out mimeType, out encoding, out extension, out streamids, out warnings);

using (MemoryStream ms = new MemoryStream())
{
    Document doc = new Document();

    PdfWriter writer = PdfWriter.GetInstance(doc, ms);

    doc.SetPageSize(PageSize.A4);

    doc.Open();

    PdfContentByte cb = writer.DirectContent;

    PdfImportedPage page;

    PdfReader reader = new PdfReader(bytes);

    int pages = reader.NumberOfPages;

    for (int i = 1; i <= pages; i++)
    {
        doc.SetPageSize(PageSize.A4);

        doc.NewPage();

        page = writer.GetImportedPage(reader, i);

        cb.AddTemplate(page, 0, 0);
    }

    PdfAction jAction = PdfAction.JavaScript(jsPrint, writer);

    writer.AddJavaScript(jAction);

    doc.Close();
}

感谢。

推荐答案

关于你提到的关于 PdfStamper 的问题（在评论）。它应该是像这样简单：

Regarding your question about PdfStamper (in the comments). It should be as simple as this:

string jsPrint = "var pp = this.getPrintParams();pp.interactive= pp.constants.interactionLevel.silent;this.print(pp);";
PdfReader reader = new PdfReader(bytes);
MemoryStream stream = new MemoryStream();
PdfStamper stamper = new PdfStamper(pdfReader, stream);
stamper.Writer.AddJavaScript(jsPrint);
stamper.Close();
reader.Close();

关于你的原题：PDF文档的自动打印被认为是一个安全隐患：人们可以在PDF发送给最终用户和PDF会导致打印机喷涌出来的页面。这曾经是可能的（真的）旧PDF浏览器，而是从现代发生观众prevent这一点。

Regarding your original question: automatic printing of PDF documents is considered being a security hazard: one could send a PDF to an end-user and that PDF would cause the printer to spew out pages. That used to be possible with (really) old PDF viewers, but modern viewers prevent this from happening.

在换句话说：你可能试图迎了过去的要求。今天的PDF查看器总是需要从最终用户的操作打印PDF文档。

In other words: you may be trying to meet a requirement of the past. Today's PDF viewers always require an action from the end user to print a PDF document.

这篇关于打印PDF使用iTextSharp的创建的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！