代碼實現報表列印

   代碼實現報表列印

   

     //初始化報表資訊
        private void SetReportInfo(string reportPath,string sourceName,DataTable dataSource,bool isFengPi)
        {
if (!File.Exists(reportPath))
            {
                MessageBox.Show("報表檔案:" + 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()+"的相關目錄資訊", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
            }
            pos = 1;
            LocalReport report1 = new LocalReport();
//設定需要列印的報表的檔案名稱。 
            report1.ReportPath = reportPath;
if (isFengPi)
            {
//設定參數
                string archveTypeName = GetArchiveTypeName();
                ReportParameter archiveType = new ReportParameter("ArchiveType", archveTypeName);
                report1.SetParameters(archiveType);
            }
//建立要列印的資料來源
            ReportDataSource source = new ReportDataSource(sourceName, dataSource);
            report1.DataSources.Add(source);
//重新整理報表中的需要呈現的資料  
            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對象的列表用來儲存報表的輸出資料 
//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，用於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資料儲存為檔案，請使用FileStream對象。
            Stream stream = new MemoryStream();
            m_streams.Add(stream);
return stream;
        }

//用來記錄當前列印到第幾頁了 
        private int m_currentPageIndex;

#region 列印報表
private void Print() 
        {
            pos = 4;
            m_currentPageIndex = 0;  
if (m_streams == null || m_streams.Count == 0)
return; 
//聲明PrintDocument對象用於資料的列印 
            PrintDocument printDoc = new PrintDocument(); 
//指定需要使用的印表機的名稱，使用Null 字元串""來指定預設印表機  
// printDoc.PrinterSettings.PrinterName = ""; 
//判斷指定的印表機是否可用 
            if (!printDoc.PrinterSettings.IsValid)
            { 
                MessageBox.Show("沒有找到印表機!","提示",MessageBoxButtons.OK,MessageBoxIcon.Information); 
return; 
            }
            pos = 5;
            printDoc.PrintPage += new PrintPageEventHandler(PrintPage);
//執行列印操作，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對象用來儲存EMF或WMF格式的圖形，
//我們在前面將報表的內容輸出為EMF圖形格式的資料流。
            m_streams[m_currentPageIndex].Position = 0;
            Metafile pageImage = new Metafile(m_streams[m_currentPageIndex]);
//指定是否橫向列印
            ev.PageSettings.Landscape = false;
//這裡的Graphics對象實際指向了印表機
            ev.Graphics.DrawImage(pageImage, ev.PageBounds);
            m_streams[m_currentPageIndex].Close();
            m_currentPageIndex++;
//設定是否需要繼續列印
            ev.HasMorePages = (m_currentPageIndex < m_streams.Count);
        }
#endregion 

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

        }