在asp.net中打印没有打印对话框的PDF

时间:2013-08-06 18:41:53

标签: c# asp.net

我在ASP.NET中有一个按钮,当它点击它时会得到一个rdlc文件并生成一个带有打印对话框屏幕的PDF文件。我想要的是直接打印它没有打印对话框,我知道它可以用Javascript完成,但我不知道如何在javascript中这样做。

    <iframe id="frmPrint" name="IframeName" width="500" height="200" runat="server"    style="display: none"></iframe>   

aspx.cs中的代码

public void PrintTicket()
    {
        string[] streamids;
        string reportType = "PDF";
        string mimeType;
        string encoding;
        //string fileNameExtension = "pdf";
        string extension;

        LocalReport report = new LocalReport();
        //Displays ticket letter and number in ticket
        report.ReportPath = "PrintTicket.rdlc";
        ReportParameter ticket_parameter = new ReportParameter();
        ticket_parameter.Name = "Ticket";
        ticket_parameter.Values.Add(TicketNo);
        report.SetParameters(new ReportParameter[] { ticket_parameter });

        //Displays date and time in ticket
        ReportParameter date = new ReportParameter();
        date.Name = "Date_Time";
        date.Values.Add(System.DateTime.Now.ToString());
        report.SetParameters(new ReportParameter[] { date });

        //Displays branch location in ticket
        ReportParameter location_parameter = new ReportParameter();
        location_parameter.Name = "Location";
        location_parameter.Values.Add(location);
        report.SetParameters(new ReportParameter[] { location_parameter });


        string deviceInfo =
          "<DeviceInfo>" +
          "  <OutputFormat>EMF</OutputFormat>" +
          "  <PageWidth>8.5in</PageWidth>" +
          "  <PageHeight>11in</PageHeight>" +
          "  <MarginTop>0.10in</MarginTop>" +
          "  <MarginLeft>0.02in</MarginLeft>" +
          "  <MarginRight>0.25in</MarginRight>" +
          "  <MarginBottom>0.15in</MarginBottom>" +
          "</DeviceInfo>";

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

        FileStream fs = new FileStream(HttpContext.Current.Server.MapPath("output2.pdf"), FileMode.Create);
        fs.Write(bytes, 0, bytes.Length);
        fs.Close();

        //Open existing PDF
        Document document = new Document(PageSize.LETTER);
        PdfReader reader = new PdfReader(HttpContext.Current.Server.MapPath("output2.pdf"));
        //Getting a instance of new PDF writer
        PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(HttpContext.Current.Server.MapPath("Print.pdf"), FileMode.Create));
        document.Open();
        PdfContentByte cb = writer.DirectContent;

        int i = 0;
        int p = 0;
        int n = reader.NumberOfPages;
        iTextSharp.text.Rectangle psize = reader.GetPageSize(1);

        float width = psize.Width;
        float height = psize.Height;

        //Add Page to new document
        while (i < n)
        {
            document.NewPage();
            p++;
            i++;

            PdfImportedPage page1 = writer.GetImportedPage(reader, i);
            cb.AddTemplate(page1, 0, 0);
        }

        //Attach javascript to the document
        PdfAction jAction = PdfAction.JavaScript("this.print(true);\r", writer);
        writer.AddJavaScript(jAction);
        document.Close();

        //Attach pdf to the iframe
        frmPrint.Attributes["src"] = "Print.pdf";
    }  

2 个答案:

答案 0 :(得分:2)

就像Steven V所说的那样,如果没有对话框,JavaScript就永远不会打印出来。你能想象你的令人毛骨悚然的打印机突然突然打印出奇怪的页面吗?

但我可以提出一个替代方案。由于您使用的是ASP.NET,为什么不使用第三方PDF生成器,在服务器端生成PDF文件,然后ajax返回指向用户的链接。用户将看到一个按钮:“获取PDF”,他将点击它,并显示一个指向真实PDF的链接!瞧!

PS:您可以在这里查看一些第三方pdf生成器: How to create PDF in ASP.NET

答案 1 :(得分:1)

我认为适用于每个浏览器的通用解决方案很难实现,但有些浏览器特定的解决方法可能会有效。

例如,在 Firefox 中,您可以按照以下步骤激活静态打印:

  1. 在地址栏中输入about:config,然后输入
  2. 右键单击空白处并选择New&gt;布尔
  3. 创建一个名为print.always_print_silent的新字符串并将其设置为True
  4. Internet Explorer 中,您可以使用此 VBScript 子:

    <script language='VBScript'>
    Sub Print()
           OLECMDID_PRINT = 6
           OLECMDEXECOPT_DONTPROMPTUSER = 2
           OLECMDEXECOPT_PROMPTUSER = 1
           call WB.ExecWB(OLECMDID_PRINT, OLECMDEXECOPT_DONTPROMPTUSER,1)
    End Sub
    document.write "<object ID='WB' WIDTH=0 HEIGHT=0 CLASSID='CLSID:8856F961-340A-11D0-A96B-00C04FD705A2'></object>"
    </script>
    

    然后您可以使用以下方式通过Javascript进行打印:

    window.print();