代碼實現報表打印

     //初始化報表信息
        private void SetReportInfo(string reportPath,string sourceName,DataTable dataSource,bool isFengPi)
        {
            if (!File.Exists(reportPath))
            {
                MessageBox.Show("報表文件:" + reportPath + " 不存在!","提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }

            if (dataSource == null || dataSource.Rows.Count == 0)
            {
                MessageBox.Show("沒有找到案卷號為:"+txtArchiveNum.Text.Trim()+"的相關目錄信息", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }
            pos = 1;
            LocalReport report1 = new LocalReport();
            //設置需要打印的報表的文件名稱。 
            report1.ReportPath = reportPath;
            if (isFengPi)
            {
                //設置參數
                string archveTypeName = GetArchiveTypeName();
                ReportParameter archiveType = new ReportParameter("ArchiveType", archveTypeName);
                report1.SetParameters(archiveType);
            }
            //創建要打印的數據源
            ReportDataSource source = new ReportDataSource(sourceName, dataSource);
            report1.DataSources.Add(source);
            //刷新報表中的需要呈現的數據  
            report1.Refresh();
            pos = 2;
            m_streams = new List<Stream>();
             string deviceInfo ="<DeviceInfo>" + 
                 "  <OutputFormat>EMF</OutputFormat>" +
                 "  <PageWidth>21cm</PageWidth>" +
                 "  <PageHeight>29.7cm</PageHeight>" +
                 "  <MarginTop>2.0066cm</MarginTop>" +
                 "  <MarginLeft>2.0066cm</MarginLeft>" +
                 "  <MarginRight>2.0066cm</MarginRight>" +
                 "  <MarginBottom>2.0066cm</MarginBottom>" +
                 "</DeviceInfo>"; 
            Warning[] warnings; 
            //將報表的內容按照deviceInfo指定的格式輸出到CreateStream函數提供的Stream中。
            report1.Render("Image", deviceInfo, CreateStream, out warnings);
        }

        //聲明一個Stream對象的列表用來保存報表的輸出數據 
        //LocalReport對象的Render方法會將報表按頁輸出為多個Stream對象。
        private List<Stream> m_streams; 
        //用來提供Stream對象的函數，用于LocalReport對象的Render方法的第三個參數。
        private Stream CreateStream(string name, string fileNameExtension, Encoding encoding, string mimeType, bool willSeek)
           
        {
            pos = 3;
            //如果需要將報表輸出的數據保存為文件，請使用FileStream對象。
            Stream stream = new MemoryStream();
            m_streams.Add(stream);
            return stream;
        }

        //用來記錄當前打印到第幾頁了 
        private int m_currentPageIndex;

        #region 打印報表
        private void Print() 
        {
            pos = 4;
            m_currentPageIndex = 0;  
            if (m_streams == null || m_streams.Count == 0)
                return; 
            //聲明PrintDocument對象用于數據的打印 
            PrintDocument printDoc = new PrintDocument(); 
            //指定需要使用的打印機的名稱，使用空字符串""來指定默認打印機  
           // printDoc.PrinterSettings.PrinterName = ""; 
            //判斷指定的打印機是否可用 
            if (!printDoc.PrinterSettings.IsValid)
            { 
                MessageBox.Show("沒有找到打印機!","提示",MessageBoxButtons.OK,MessageBoxIcon.Information); 
                return; 
            }
            pos = 5;
            printDoc.PrintPage += new PrintPageEventHandler(PrintPage);
            //執行打印操作，Print方法將觸發PrintPage事件。
            printDoc.Print();

            //釋放資源
            foreach (Stream stream in m_streams)
            {               
                stream.Dispose();
                stream.Close();
            }
            m_streams = null;
        }

        private void PrintPage(object sender, PrintPageEventArgs ev)
        {
            pos =6;
            //Metafile對象用來保存EMF或WMF格式的圖形，
            //我們在前面將報表的內容輸出為EMF圖形格式的數據流。
            m_streams[m_currentPageIndex].Position = 0;
            Metafile pageImage = new Metafile(m_streams[m_currentPageIndex]);
            //指定是否橫向打印
            ev.PageSettings.Landscape = false;
            //這里的Graphics對象實際指向了打印機
            ev.Graphics.DrawImage(pageImage, ev.PageBounds);
            m_streams[m_currentPageIndex].Close();
            m_currentPageIndex++;
            //設置是否需要繼續打印
            ev.HasMorePages = (m_currentPageIndex < m_streams.Count);
        }
        #endregion 

       //打印封皮
        private void btPrint_Click(object sender, EventArgs e)
        {
            string reportPath = Application.StartupPath + "\\Files\\ReportEnvelop.rdlc";
            SetReportInfo(reportPath, "DataSet1", GetDataSource(true), true);
            Print();

        }