C#打印控件ReportViewer使用总结（四）
直接打印
默认情况ReportViewer是不支持直接打印的，需要借助PrintDocument打印类，这里对此类进行了二次封装继承，直接拿来用就可以，代码如下：
using Microsoft.Reporting.WinForms;
using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Drawing.Imaging;
using System.Drawing.Printing;
using System.Drawing;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Runtime.CompilerServices;
namespace WinformReportTest
{
class AutoPrintCls : PrintDocument
{
private PageSettings m_pageSettings;
private int m_currentPage;
private List
private bool isPrint = true;
public AutoPrintCls(ServerReport serverReport) : this((Report)serverReport)
{
RenderAllServerReportPages(serverReport);
}
public AutoPrintCls(LocalReport localReport) : this((Report)localReport)
{
RenderAllLocalReportPages(localReport);
}
private AutoPrintCls(Report report)
{
// Set the page settings to the default defined in the report
ReportPageSettings reportPageSettings = report.GetDefaultPageSettings();
// The page settings object will use the default printer unless
// PageSettings.PrinterSettings is changed. This assumes there
// is a default printer.
m_pageSettings = new PageSettings();
m_pageSettings.PaperSize = reportPageSettings.PaperSize;
m_pageSettings.Margins = reportPageSettings.Margins;
}
protected override void Dispose(bool disposing)
{
base.Dispose(disposing);
if (disposing)
{
foreach (Stream s in m_pages)
{
s.Dispose();
}
m_pages.Clear();
}
}
protected override void OnBeginPrint(PrintEventArgs e)
{
base.OnBeginPrint(e);
m_currentPage = 0;
}
protected override void OnPrintPage(PrintPageEventArgs e)
{
base.OnPrintPage(e);
Stream pageToPrint = m_pages[m_currentPage];
pageToPrint.Position = 0;
// Load each page into a Metafile to draw it.
using (Metafile pageMetaFile = new Metafile(pageToPrint))
{
Rectangle adjustedRect = new Rectangle(e.PageBounds.Left - (int)e.PageSettings.HardMarginX, e.PageBounds.Top - (int)e.PageSettings.HardMarginY, e.PageBounds.Width, e.PageBounds.Height);
// Draw a white background for the report
e.Graphics.FillRectangle(Brushes.White, adjustedRect);
// Draw the report content
e.Graphics.DrawImage(pageMetaFile, adjustedRect);
// Prepare for next page. Make sure we haven't hit the end.
m_currentPage++;
e.HasMorePages = m_currentPage < m_pages.Count;
}
}
protected override void OnQueryPageSettings(QueryPageSettingsEventArgs e)
{
e.PageSettings = (PageSettings)m_pageSettings.Clone();
}
///
/// 直接打印
///
public void AutoPrint()
{
if (isPrint)
{
this.Print();
Dispose(true);
}
else
{
MessageBox.Show("error: m_pages count is 0.");
}
}
private void RenderAllServerReportPages(ServerReport serverReport)
{
try
{
string deviceInfo = CreateEMFDeviceInfo();
// Generating Image renderer pages one at a time can be expensive. In order
// to generate page 2, the server would need to recalculate page 1 and throw it
// away. Using PersistStreams causes the server to generate all the pages in
// the background but return as soon as page 1 is complete.
NameValueCollection firstPageParameters = new NameValueCollection();
firstPageParameters.Add("rs:PersistStreams", "True");
// GetNextStream returns the next page in the sequence from the background process
// started by PersistStreams.
NameValueCollection nonFirstPageParameters = new NameValueCollection();
nonFirstPageParameters.Add("rs:GetNextStream", "True");
string mimeType;
string fileExtension;
Stream pageStream = serverReport.Render("IMAGE", deviceInfo, firstPageParameters, out mimeType, out fileExtension);
// The server returns an empty stream when moving beyond the last page.
while (pageStream.Length > 0)
{
m_pages.Add(pageStream);
pageStream = serverReport.Render("IMAGE", deviceInfo, nonFirstPageParameters, out mimeType, out fileExtension);
}
}
catch (Exception e)
{
MessageBox.Show("possible missing information :: " + e);
}
}
private void RenderAllLocalReportPages(LocalReport localReport)
{
try
{
string deviceInfo = CreateEMFDeviceInfo();
Warning[] warnings;
localReport.Render("IMAGE", deviceInfo, LocalReportCreateStreamCallback, out warnings);
if (m_pages == null || m_pages.Count == 0)
{
isPrint = false;
}
}
catch (Exception e)
{
MessageBox.Show("error :: " + e);
}
}
private Stream LocalReportCreateStreamCallback(string name, string extension, Encoding encoding, string mimeType, bool willSeek)
{
MemoryStream stream = new MemoryStream();
m_pages.Add(stream);
return stream;
}
private string CreateEMFDeviceInfo()
{
PaperSize paperSize = m_pageSettings.PaperSize;
Margins margins = m_pageSettings.Margins;
string deviceInfo =
@"
return string.Format(CultureInfo.InvariantCulture, deviceInfo, ToInches(paperSize.Width), ToInches(paperSize.Height), ToInches(margins.Top), ToInches(margins.Left), ToInches(margins.Right), ToInches(margins.Bottom));
}
private static string ToInches(int hundrethsOfInch)
{
double inches = hundrethsOfInch / 100.0;
return inches.ToString(CultureInfo.InvariantCulture) + "in";
}
}
}
使用实例：https://download.csdn.net/download/sunsddd/87922367