我正在使用 Visual Studio 2010 C# Windows Forms Application + MySql 我有一个 100% 工作的报表查看器。reportviewer 充满了我的数据库的数据，它显示我点击按钮打印并打印......但是，我的客户不想点击这个按钮，他想自动打印。当我调用 ReportViewer 时，它会自行打印，无需单击按钮即可。谁能告诉我我是怎么做到的？
我从工具箱中尝试了 reportviewer1.print 和 PrintDocument。但我不知道如何正确使用这些。
感谢关注！
我遇到了同样的问题，这是我使用的代码，它的工作原理就像一个魅力！
using System;
using System.IO;
using System.Text;
using System.Globalization;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Printing;
using Microsoft.Reporting.WinForms;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Diagnostics;
using System.ComponentModel;
using System.Data;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace NewLabelPrinter
{
/// <summary>
/// The ReportPrintDocument will print all of the pages of a ServerReport or LocalReport.
/// The pages are rendered when the print document is constructed. Once constructed,
/// call Print() on this class to begin printing.
/// </summary>
class AutoPrintCls : PrintDocument
{
private PageSettings m_pageSettings;
private int m_currentPage;
private List<Stream> m_pages = new List<Stream>();
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();
}
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);
}
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;
// The device info string defines the page range to print as well as the size of the page.
// A start and end page of 0 means generate all pages.
return string.Format(
CultureInfo.InvariantCulture,
"<DeviceInfo><OutputFormat>emf</OutputFormat><StartPage>0</StartPage><EndPage>0</EndPage><MarginTop>{0}</MarginTop><MarginLeft>{1}</MarginLeft><MarginRight>{2}</MarginRight><MarginBottom>{3}</MarginBottom><PageHeight>{4}</PageHeight><PageWidth>{5}</PageWidth></DeviceInfo>",
ToInches(margins.Top),
ToInches(margins.Left),
ToInches(margins.Right),
ToInches(margins.Bottom),
ToInches(paperSize.Height),
ToInches(paperSize.Width));
}
private static string ToInches(int hundrethsOfInch)
{
double inches = hundrethsOfInch / 100.0;
return inches.ToString(CultureInfo.InvariantCulture) + "in";
}
}
}
该课程的设置非常适合您的需要，那么您需要做的就是：
private void AutoPrint()
{
AutoPrintCls autoprintme = new AutoPrintCls(reportViewer1.LocalReport);
autoprintme.Print();
}
嘿，它会打印出来。只需将其附加到代码中的 A 方法（可能在报告加载之后。）并且您的设置很好！
选项：（未测试）
正如发现的那样，它会打印到默认打印机上，要更改打印机，您可以执行以下操作：
if (printDialog.ShowDialog() == DialogResult.OK)
{
m_pageSettings .PrinterSettings.PrinterName = printDialog.PrinterSettings.PrinterName;
}
虽然没有测试，因为我不再有任何源代码来测试它
如果我的水晶报表答案不适合你，你也可以试试这个页面。同样，我还没有测试过它，也不能确定它是否有效，但它看起来像是一种完全不同的方法，它可能有效。如果没有，那么不幸的是，我不会提供任何帮助。
这就是我们使用 Crystal Reports 的方式。
ReportDocument rd = new ReportDocument();
// Insert code to run the report here
// This gets the user's default printer to print to.
PrintDialog prt = new PrintDialog();
rd.PrintOptions.PrinterName = prt.PrinterSettings.PrinterName;
// This does the printing.
rd.PrintToPrinter(copies, true, 1, 1000);
我认为你的等价物PrintOptions.PrinterName是ReportViewer.PrinterSettings，但我怀疑你真正需要的是等价于PrintToPrinter()，我在简短的外观中没有看到。