逐步解說：列印本機報表而不進行預覽

發行項
08/21/2008

本逐步解說示範如何使用 LocalReport 物件和 CreateStreamCallback 回呼函式，以程式設計方式列印報表而不檢視報表。

必要條件

您必須有範例報表和資料來源的存取權。如需詳細資訊，請參閱列印逐步解說的範例資料和報表。

請執行下列步驟來建立 Microsoft Visual Studio 主控台應用程式專案。

建立新的主控台應用程式專案

在 [檔案] 功能表中，指向 [開新檔案]，再選取 [專案]。
在 [專案類型] 窗格中，選擇 [Visual C#] 或 [Visual Basic] 和 [Windows]。
在 [範本] 窗格中，選擇 [主控台應用程式]，建立 Microsoft 主控台應用程式。
在 [名稱] 方塊中，輸入專案的名稱：PrintLocalReport。
在 [位置] 方塊中，輸入用來儲存專案的目錄，或按一下 [瀏覽] 來導覽找到它。此專案會與 [程式碼] 視窗一起開啟，顯示 Program 程式碼檔案。

新增參考

從 [專案] 功能表中，選取 [新增參考]。此時會出現 [新增參考] 對話方塊。
從 [.NET] 索引標籤上顯示的清單方塊中，選取 System.Drawing、System.Windows.Forms 和 Microsoft.Reporting.Winforms。

加入現有的檔案 report.rdlc 和 data.xml

從 [專案] 功能表上，選取 [加入現有項目]。[加入現有項目] 對話方塊隨即出現。
導覽至儲存 report.rdlc 和 data.xml 的資料夾。選取這兩個檔案。
按一下 [加入]。這兩個檔案會以專案之一部分的形式出現在 [方案總管] 中。

新增程式碼

Program 程式碼檔案應該已經開啟可供編輯。如果不是的話，請按兩下 [方案總管] 視窗中的 Program.cs 或 Module1.vb 檔案。

使用您選擇之程式設計語言的下列程式碼來取代 Program 檔案中的現有程式碼。

如果是 Visual C#，請使用下列程式碼。

using System;
using System.IO;
using System.Data;
using System.Text;
using System.Drawing.Imaging;
using System.Drawing.Printing;
using System.Collections.Generic;
using System.Windows.Forms;
using Microsoft.Reporting.WinForms;

public class Demo : IDisposable
{
    private int m_currentPageIndex;
    private IList<Stream> m_streams;

    private DataTable LoadSalesData()
    {
        // Create a new DataSet and read sales data file 
        //    data.xml into the first DataTable.
        DataSet dataSet = new DataSet();
        dataSet.ReadXml(@"..\..\data.xml");
        return dataSet.Tables[0];
    }
    // Routine to provide to the report renderer, in order to
    //    save an image for each page of the report.
    private Stream CreateStream(string name,
      string fileNameExtension, Encoding encoding,
      string mimeType, bool willSeek)
    {
        Stream stream = new FileStream(@"..\..\" + name +
           "." + fileNameExtension, FileMode.Create);
        m_streams.Add(stream);
        return stream;
    }
    // Export the given report as an EMF (Enhanced Metafile) file.
    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;
    }
    // Handler for PrintPageEvents
    private void PrintPage(object sender, PrintPageEventArgs ev)
    {
        Metafile pageImage = new
           Metafile(m_streams[m_currentPageIndex]);
        ev.Graphics.DrawImage(pageImage, ev.PageBounds);
        m_currentPageIndex++;
        ev.HasMorePages = (m_currentPageIndex < m_streams.Count);
    }

    private void Print()
    {
        const string printerName =
           "Microsoft Office Document Image Writer";
        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);
            MessageBox.Show(msg, "Print Error");
            return;
        }
        printDoc.PrintPage += new PrintPageEventHandler(PrintPage);
        printDoc.Print();
    }
    // Create a local report for Report.rdlc, load the data,
    //    export the report to an .emf file, and print it.
    private void Run()
    {
        LocalReport report = new LocalReport();
        report.ReportPath = @"..\..\Report.rdlc";
        report.DataSources.Add(
           new ReportDataSource("Sales", LoadSalesData()));
        Export(report);
        m_currentPageIndex = 0;
        Print();
    }

    public void Dispose()
    {
        if (m_streams != null)
        {
            foreach (Stream stream in m_streams)
                stream.Close();
            m_streams = null;
        }
    }

    public static void Main(string[] args)
    {
        using (Demo demo = new Demo())
        {
            demo.Run();
        }
    }
}

如果是 Visual Basic，請使用下列程式碼。

Imports System.IO
Imports System.Data
Imports System.Text
Imports System.Drawing.Imaging
Imports System.Drawing.Printing
Imports System.Collections.Generic
Imports Microsoft.Reporting.WinForms

Public Class Demo
    Implements IDisposable

    Private m_currentPageIndex As Integer
    Private m_streams As IList(Of Stream)

    Private Function LoadSalesData() As DataTable
        Dim dataSet As New DataSet()
        dataSet.ReadXml("..\..\data.xml")
        Return dataSet.Tables(0)
    End Function

    Private Function CreateStream(ByVal name As String, _
       ByVal fileNameExtension As String, _
       ByVal encoding As Encoding, ByVal mimeType As String, _
       ByVal willSeek As Boolean) As Stream
        Dim stream As Stream = _
            New FileStream("..\..\" + _
             name + "." + fileNameExtension, FileMode.Create)
        m_streams.Add(stream)
        Return stream
    End Function

    Private Sub Export(ByVal report As LocalReport)
        Dim deviceInfo As String = _
          "<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>"
        Dim warnings() As Warning = Nothing
        m_streams = New List(Of Stream)()
        report.Render("Image", deviceInfo, AddressOf CreateStream, _
           warnings)

        Dim stream As Stream
        For Each stream In m_streams
            stream.Position = 0
        Next
    End Sub

    Private Sub PrintPage(ByVal sender As Object, _
    ByVal ev As PrintPageEventArgs)
        Dim pageImage As New Metafile(m_streams(m_currentPageIndex))
        ev.Graphics.DrawImage(pageImage, ev.PageBounds)

        m_currentPageIndex += 1
        ev.HasMorePages = (m_currentPageIndex < m_streams.Count)
    End Sub

    Private Sub Print()
        Const printerName As String = _
          "Microsoft Office Document Image Writer"

        If m_streams Is Nothing Or m_streams.Count = 0 Then
            Return
        End If

        Dim printDoc As New PrintDocument()
        printDoc.PrinterSettings.PrinterName = printerName
        If Not printDoc.PrinterSettings.IsValid Then
            Dim msg As String = String.Format( _
                "Can't find printer ""{0}"".", printerName)
            Console.WriteLine(msg)
            Return
        End If
        AddHandler printDoc.PrintPage, AddressOf PrintPage
        printDoc.Print()
    End Sub

    Private Sub Run()
        Dim report As LocalReport = New LocalReport()
        report.ReportPath = "..\..\Report.rdlc"
        report.DataSources.Add(New ReportDataSource("Sales", _
           LoadSalesData()))

        Export(report)

        m_currentPageIndex = 0
        Print()
    End Sub

    Public Overloads Sub Dispose() Implements IDisposable.Dispose
        If Not (m_streams Is Nothing) Then
            Dim stream As Stream
            For Each stream In m_streams
                stream.Close()
            Next
            m_streams = Nothing
        End If
    End Sub

    Public Shared Sub Main(ByVal args As String())
        Using demo As Demo = New Demo()
            demo.Run()
        End Using
    End Sub
End Class

建立和執行應用程式

在 [建置] 功能表中，按一下 [建置方案] 來建立應用程式。建立過程中會編譯報表，並將找到的任何錯誤 (例如用於報表中的運算式語法錯誤) 加入到 [工作清單] 中。
按 F5 執行應用程式。

另請參閱

參考

LocalReport
Microsoft.Reporting.WinForms.CreateStreamCallback
Microsoft.Reporting.WebForms.CreateStreamCallback

其他資源

範例和逐步解說