單擊按鈕時如何在 ASP.net 中打印 .rdlc

Question

我有一個 Web 應用程序，當用戶單擊按鈕時，它會在沒有打印對話框的情況下直接將 .rdlc 打印到打印機。 當我在本地運行它時它工作正常，但是當我將它上傳到 Intranet 時根本不工作。 有人可以解釋如何在 Intranet 中進行這項工作嗎？

更新

        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 void PrintPage(object sender, PrintPageEventArgs ev)
    {
        Metafile pageImage = new Metafile(m_streams[currentPageIndex]);
        ev.Graphics.DrawImage(pageImage,ev.PageBounds);
        currentPageIndex++;
        ev.HasMorePages = (currentPageIndex < m_streams.Count);
    }
    private void Print_Ticket()
    {

        const string printerName = "HPLaser"
        if (m_streams == null || m_streams.Count == 0)
            return;
        PrintDocument printDoc = new PrintDocument();
        printDoc.PrinterSettings.PrinterName = printerName;
        if (!printDoc.PrinterSettings.IsValid)
        {
            string msg = String.Format("Can't find printer \"{0}\".", printerName);
            Console.WriteLine(msg);
            return;
        }
        printDoc.PrintPage += new PrintPageEventHandler(PrintPage);
        printDoc.Print(); //Prints Document
    }
    public void WriteTicket(string ticket_number, string queue)
    {
        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(ticket_number);
        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(queue);
        report.SetParameters(new ReportParameter[] { location_parameter });

        Export(report);
        currentPageIndex = 0;
        Print_Ticket();
    }
    //Clears stream
    public new void Dispose()
    {
        if (m_streams != null)
        {
            foreach (Stream stream in m_streams)
                stream.Close();
        }
    }

Answer 1

看起來您的 IIS 應用程序是負責啟動打印作業的應用程序。 用戶無法控制打印。

雖然這是可行的，但您需要首先在 IIS 服務器上執行以下步驟：

1. 在 IIS 服務器上創建本地用戶帳戶
2. 使用新用戶帳戶登錄，並設置打印機（確保將其設置為默認打印機）
3. 打印出測試頁（如果它不起作用，請檢查服務器用於與打印機通信的端口並確保這些端口已打開）
4. 設置 IIS 應用程序池以使用您創建的新用戶帳戶的憑據運行（它必須是交互式帳戶 - 不要在 networkservice 或 localservice 下運行站點。）
5. 嘗試從您的 aspx 頁面打印

Answer 2

您需要將報告導出為 PDF，然后使用 iTextSharp 進行打印。 客戶還需要安裝 PDF 閱讀器。

創建隱藏 iFrame 如下：

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

添加一個 ASP.NET 按鈕：

<asp:ImageButton ID="btnPrint" runat="server" OnClick="btnPrint_Click"  />

添加以下引用：

using iTextSharp.text.pdf;
using iTextSharp.text;
using System.IO;

將以下代碼添加到按鈕單擊事件：

Warning[] warnings;              
string[] streamids;
string mimeType;
string encoding;
string extension;

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

FileStream fs = new FileStream(HttpContext.Current.Server.MapPath("output.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("output.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;
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";

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