托管到IIS时无法访问打印机

Question

我在MVC中使用rdlc报表，在Visual Studio中运行时打印操作完美运行，但是当发布到同一台机器上设置的iis时，则不会进行打印操作。但是当我将报表以pdf格式返回时，报表会在那里，我可以使用javascript打印文件。但是我实际上不需要显示报告，而是希望从服务器打印。。谢谢您的帮助

  public ActionResult GenerateOrder()
    {


        try
        {

            LocalReport report = new LocalReport();
            report.ReportPath = (Server.MapPath("~/Reports/Report1.rdlc"));
            Export(report);
            Print();
        }
        catch (Exception Ex)
        {

        }

        return View();
    }

    private Stream CreateStream(string name,
    string fileNameExtension, Encoding encoding,
    string mimeType, bool willSeek)
    {
        Stream stream = new MemoryStream();
        m_streams.Add(stream);
        return stream;
    }
     private void Export(LocalReport report)
    {
        string deviceInfo =
          @"<DeviceInfo>
            <OutputFormat>EMF</OutputFormat>
            <PageWidth>8.5in</PageWidth>
            <PageHeight>11in</PageHeight>
            <MarginTop>0.25in</MarginTop>
            <MarginLeft>0.25in</MarginLeft>
            <MarginRight>0.25in</MarginRight>
            <MarginBottom>0.25in</MarginBottom>
        </DeviceInfo>";
        Warning[] warnings;
        m_streams = new List<Stream>();
        report.Render("Image", deviceInfo, CreateStream,
           out warnings);
        foreach (Stream stream in m_streams)
            stream.Position = 0;
    }
    private int m_currentPageIndex;
    private IList<Stream> m_streams;

    private void PrintPage(object sender, PrintPageEventArgs ev)
    {
        try
        {
            Metafile pageImage = new
                        Metafile(m_streams[m_currentPageIndex]);

            // Adjust rectangular area with printer margins.
            Rectangle adjustedRect = new Rectangle(
                ev.PageBounds.Left - (int)ev.PageSettings.HardMarginX,
                ev.PageBounds.Top - (int)ev.PageSettings.HardMarginY,
                ev.PageBounds.Width,
                ev.PageBounds.Height);

            // Draw a white background for the report
            ev.Graphics.FillRectangle(Brushes.White, adjustedRect);

            // Draw the report content
            ev.Graphics.DrawImage(pageImage, adjustedRect);

            // Prepare for the next page. Make sure we haven't hit the end.
            m_currentPageIndex++;
            ev.HasMorePages = (m_currentPageIndex < m_streams.Count);
        }
        catch (Exception ex)
        {

        }

    }
   private void Print()
    {
        if (m_streams == null || m_streams.Count == 0)
            throw new Exception("Error: no stream to print.");
        PrintDocument printDoc = new PrintDocument();
        if (!printDoc.PrinterSettings.IsValid)
        {
            throw new Exception("Error: cannot find the default printer.");
        }
        else
        {

            PrinterSettings pset = new PrinterSettings();
            printDoc.PrintPage += new PrintPageEventHandler(PrintPage);
            m_currentPageIndex = 0;
            printDoc.PrinterSettings.PrinterName = pset.PrinterName;
            printDoc.Print();
        }
    }

Answer 1

我认为您想从服务器本身打印页面。 检查运行应用程序的身份 。 如果它在默认帐户下运行，则将其更改为您的帐户或具有打印机访问权限的其他帐户 。

转到IIS，（a）首先找到您的应用程序正在使用的应用程序池 （b），然后转到“ 应用程序池”详细信息并找到它正在使用的标识 。 （c）将此身份更改为您/其他具有打印机访问权限的帐户。