使用 LocalReport 对象进行打印

Posted 2020-07-07 ChineseMoonGod

添加引用

 

1. 从“项目”菜单中，选择“添加引用”。将显示“添加引用”对话框。

2. 从“.NET”选项卡上显示的列表框中，选择 Winforms 和 Drawing 组件。

添加代码

1. 应打开 Program.cs 文件以供编辑。如果未打开，在“解决方案资源管理器”窗口中双击 Program.cs 文件。

2. 使用以下代码替换 Program.cs 文件中的现有代码。确保使用本地计算机上示例报表的有效路径来替换报表引用。不要向项目添加 Data.xml 和 Report.rdlc。下面以编程方式访问这些文件。

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()
    {
        DataSet dataSet = new DataSet();
        dataSet.ReadXml(@"c:\My Reports\data.xml");
        return dataSet.Tables[0];
    }

    private Stream CreateStream(string name, 
      string fileNameExtension, Encoding encoding,
      string mimeType, bool willSeek)
    {
　　　　

//string strPath = @"D:\Report\";
//if (System.IO.Directory.Exists(strPath) == false)
//{
// System.IO.Directory.CreateDirectory(strPath);
//}
//string filenameext = DateTime.Now.Year.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString();
//string strFile = strPath + filenameext + name + "." + fileNameExtension;
//Stream stream = new FileStream(strFile, FileMode.Create);
//m_streams.Add(stream);
//return stream;

        Stream stream = new FileStream(@"c:\My Reports\" + name + 
          "." + fileNameExtension, FileMode.Create);
        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[m_currentPageIndex]);
        ev.Graphics.DrawImage(pageImage, ev.PageBounds);

        m_currentPageIndex++;
        ev.HasMorePages = (m_currentPageIndex < m_streams.Count);
    }

    private void Print()
    {

　　

//if (m_streams == null || m_streams.Count == 0)
// return;
//PrintDocument printDoc = new PrintDocument();

//if (!printDoc.PrinterSettings.IsValid)
//{
// string msg = String.Format("Can‘t find printer \"{0}\".", "默认打印机!");
// MessageBox.Show(msg, "找不到默认打印机");
// return;
//}
//printDoc.PrintPage += new PrintPageEventHandler(PrintPage);
//printDoc.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();
    }

    private void Run()
    {
        LocalReport report = new LocalReport();
        report.ReportPath = @"c:\My Reports\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();
        }
    }
}

 

参考：https://msdn.microsoft.com/zh-cn/library/ms252091(VS.80).aspx