RDLC直接打印帮助类

代码

 /// <summary>
    /// 打印帮助类
    /// </summary>
    public class PrintHelper
    {  private int m_currentPageIndex;
        private IList<Stream> m_streams;

        /// <summary>
        /// 报表直接打印
        /// </summary>
        /// <param name="reportPath">报表文件路径</param>
        /// <param name="printerName">打印机名称</param>
        /// <param name="dt">DataTable</param>
        /// <param name="sourceName">rdlc的数据集名称</param>
        /// <param name="paraList">参数列表</param>
        public void Run(string reportPath, string printerName, DataTable dt, string sourceName, List<ReportParameter> paraList)
        {
            LocalReport report = new LocalReport();
            report.ReportPath = reportPath;
            report.DataSources.Add(new ReportDataSource(sourceName,dt));
            report.EnableExternalImages = true;
            report.SetParameters(paraList);
            Export(report);
            m_currentPageIndex = 0;
            Print(printerName);
        }

        private void Export(LocalReport report)
        {
            string deviceInfo =
                "<DeviceInfo>" + 
                " <OutputFormat>EMF</OutputFormat>"+
                "</DeviceInfo>";
            Warning[] warnings;
            m_streams = new List<Stream>();
            try
            {
                report.Render("Image", deviceInfo, CreateStream, out warnings);
            }
            catch (Exception ex)
            {
                Exception innerEx = ex.InnerException;
                while (innerEx != null)
                {
                    string errmessage = innerEx.Message;
                    innerEx = innerEx.InnerException;

                }
            }

            foreach (Stream stream in m_streams)
            {
                stream.Position = 0;
            }
        }

        private Stream CreateStream(string name, string fileNameExtension, Encoding encoding, string mimeType, bool willSeek)
        {
            Stream stream = new FileStream(name + DateTime.Now.Millisecond + "." + fileNameExtension, FileMode.Create);
            m_streams.Add(stream);
            return stream;
        }
        private void Print(string printerName)
        {
            if (m_streams == null || m_streams.Count == 0) return;
            PrintDocument printDoc = new PrintDocument();
            if (printerName.Length > 0)
            {
                printDoc.PrinterSettings.PrinterName = printerName;
            }
            foreach (PaperSize ps in printDoc.PrinterSettings.PaperSizes)
            {
                if (ps.PaperName == "A4")
                {
                    printDoc.PrinterSettings.DefaultPageSettings.PaperSize = ps;
                    printDoc.DefaultPageSettings.PaperSize = ps;
                }
            }
            if (!printDoc.PrinterSettings.IsValid)
            {
                string msg = string.Format("找不到打印机：{0}",printerName);
                LogUtil.Log(msg);
                return;
            }
            printDoc.PrintPage += new PrintPageEventHandler(PrintPage);
            printDoc.Print();
        }

        private void PrintPage(object sender, PrintPageEventArgs ev)
        {
            Metafile pageImage = new Metafile(m_streams[m_currentPageIndex]);
            ev.Graphics.DrawImage(pageImage, 0, 0, 827, 1169);//像素
            m_currentPageIndex++;
            ev.HasMorePages = (m_currentPageIndex < m_streams.Count);
        }
    }

说明

打印格式

string deviceInfo =
            "<DeviceInfo>" +
            "  <OutputFormat>EMF</OutputFormat>" +
            "  <PageWidth>210mm</PageWidth>" +
            "  <PageHeight>297mm</PageHeight>" +
            "  <MarginTop>5mm</MarginTop>" +
            "  <MarginLeft>10mm</MarginLeft>" +
            "  <MarginRight>10mm</MarginRight>" +
            "  <MarginBottom>5mm</MarginBottom>" +
            "</DeviceInfo>";//这里是设置打印的格式 边距什么的

关于OutputFormat：

http://support.supermap.com.cn/DataWarehouse/WebDocHelp/6.1.3/iserverOnlineHelp/mergedProjects/iServerJavadoc/com/supermap/services/components/commontypes/OutputFormat.html

参考文章

http://www.cnblogs.com/bfyx/p/3279385.html （详细）

http://blog.csdn.net/moshuchao/article/details/2607017

http://www.cnblogs.com/qiuweiguo/archive/2011/08/26/2154706.html

收集另一文

http://www.cnblogs.com/hlxs/archive/2010/11/18/2087988.html

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

            if (dataSource == null || dataSource.Rows.Count == 0)
            {
                MessageBox.Show("没有找到案卷号为:"+txtArchiveNum.Text.Trim()+"的相关目录信息", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }
            pos = 1;
            LocalReport report1 = new LocalReport();
            //设置需要打印的报表的文件名称。 
            report1.ReportPath = reportPath;
            if (isFengPi)
            {
                //设置参数
                string archveTypeName = GetArchiveTypeName();
                ReportParameter archiveType = new ReportParameter("ArchiveType", archveTypeName);
                report1.SetParameters(archiveType);
            }
            //创建要打印的数据源
            ReportDataSource source = new ReportDataSource(sourceName, dataSource);
            report1.DataSources.Add(source);
            //刷新报表中的需要呈现的数据  
            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; 
            //将报表的内容按照deviceInfo指定的格式输出到CreateStream函数提供的Stream中。
            report1.Render("Image", deviceInfo, CreateStream, out warnings);
        }

        //声明一个Stream对象的列表用来保存报表的输出数据 
        //LocalReport对象的Render方法会将报表按页输出为多个Stream对象。
        private List<Stream> m_streams; 
        //用来提供Stream对象的函数，用于LocalReport对象的Render方法的第三个参数。
        private Stream CreateStream(string name, string fileNameExtension, Encoding encoding, string mimeType, bool willSeek)
           
        {
            pos = 3;
            //如果需要将报表输出的数据保存为文件，请使用FileStream对象。
            Stream stream = new MemoryStream();
            m_streams.Add(stream);
            return stream;
        }

        //用来记录当前打印到第几页了 
        private int m_currentPageIndex;

        #region 打印报表
        private void Print() 
        {
            pos = 4;
            m_currentPageIndex = 0;  
            if (m_streams == null || m_streams.Count == 0)
                return; 
            //声明PrintDocument对象用于数据的打印 
            PrintDocument printDoc = new PrintDocument(); 
            //指定需要使用的打印机的名称，使用空字符串""来指定默认打印机  
           // printDoc.PrinterSettings.PrinterName = ""; 
            //判断指定的打印机是否可用 
            if (!printDoc.PrinterSettings.IsValid)
            { 
                MessageBox.Show("没有找到打印机!","提示",MessageBoxButtons.OK,MessageBoxIcon.Information); 
                return; 
            }
            pos = 5;
            printDoc.PrintPage += new PrintPageEventHandler(PrintPage);
            //执行打印操作，Print方法将触发PrintPage事件。
            printDoc.Print();

            //释放资源
            foreach (Stream stream in m_streams)
            {               
                stream.Dispose();
                stream.Close();
            }
            m_streams = null;
        }

        private void PrintPage(object sender, PrintPageEventArgs ev)
        {
            pos =6;
            //Metafile对象用来保存EMF或WMF格式的图形，
            //我们在前面将报表的内容输出为EMF图形格式的数据流。
            m_streams[m_currentPageIndex].Position = 0;
            Metafile pageImage = new Metafile(m_streams[m_currentPageIndex]);
            //指定是否横向打印
            ev.PageSettings.Landscape = false;
            //这里的Graphics对象实际指向了打印机
            ev.Graphics.DrawImage(pageImage, ev.PageBounds);
            m_streams[m_currentPageIndex].Close();
            m_currentPageIndex++;
            //设置是否需要继续打印
            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();

        }