问题描述
我在 Reza Aghaei 的帮助下成功创建了一个 DLL
这是 C# 代码(我从 Print RDLC Report without showing ReportViewer Control 获得):
using Microsoft.Reporting.WinForms;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Printing;
using System.IO;
public static class LocalReportExtensions
{
public static void Print(this LocalReport report)
{
var pageSettings = new PageSettings();
pageSettings.PaperSize = report.GetDefaultPageSettings().PaperSize;
pageSettings.Landscape = report.GetDefaultPageSettings().IsLandscape;
pageSettings.Margins = report.GetDefaultPageSettings().Margins;
Print(report,pageSettings);
}
public static void Print(this LocalReport report,PageSettings pageSettings)
{
string deviceInfo =
$@"<DeviceInfo>
<OutputFormat>EMF</OutputFormat>
<PageWidth>{pageSettings.PaperSize.Width * 100}in</PageWidth>
<PageHeight>{pageSettings.PaperSize.Height * 100}in</PageHeight>
<MarginTop>{pageSettings.Margins.Top * 100}in</MarginTop>
<MarginLeft>{pageSettings.Margins.Left * 100}in</MarginLeft>
<MarginRight>{pageSettings.Margins.Right * 100}in</MarginRight>
<MarginBottom>{pageSettings.Margins.Bottom * 100}in</MarginBottom>
</DeviceInfo>";
Warning[] warnings;
var streams = new List<Stream>();
var currentPageIndex = 0;
report.Render("Image",deviceInfo,(name,fileNameExtension,encoding,mimeType,willSeek) =>
{
var stream = new MemoryStream();
streams.Add(stream);
return stream;
},out warnings);
foreach (Stream stream in streams)
stream.Position = 0;
if (streams == null || streams.Count == 0)
throw new Exception("Error: no stream to print.");
var printDocument = new PrintDocument();
printDocument.DefaultPageSettings = pageSettings;
if (!printDocument.PrinterSettings.IsValid)
throw new Exception("Error: cannot find the default printer.");
else
{
printDocument.PrintPage += (sender,e) =>
{
Metafile pageImage = new Metafile(streams[currentPageIndex]);
Rectangle adjustedRect = new Rectangle(
e.PageBounds.Left - (int)e.PageSettings.HardMarginX,e.PageBounds.Top - (int)e.PageSettings.HardMarginY,e.PageBounds.Width,e.PageBounds.Height);
e.Graphics.FillRectangle(Brushes.White,adjustedRect);
e.Graphics.DrawImage(pageImage,adjustedRect);
currentPageIndex++;
e.HasMorePages = (currentPageIndex < streams.Count);
e.Graphics.DrawRectangle(Pens.Red,adjustedRect);
};
printDocument.EndPrint += (Sender,e) =>
{
if (streams != null)
{
foreach (Stream stream in streams)
stream.Close();
streams = null;
}
};
printDocument.Print();
}
}
}
this.reportViewer1.LocalReport.Print();
我参考并尝试在 vb.net 中调用它
如果我尝试
this.reportViewer1.LocalReport.Print()
或
LocalReport.Print()
它给出了错误。
我错过了什么请帮助,或者如果专家可以在 Vb.net 中转换它,那将不胜感激。
我的收据是这样的。
如果有专家帮助我解决这个问题,我将不胜感激,因为我主要在 VB.net 中工作。
解决方法
注意:我尝试过的所有转换器都无法将链接帖子的 C# 代码转换为正确的 VB.NET 版本。您可以在链接的帖子中找到原始 C# 版本:Print RDLC Report without showing ReportViewer Control。
VB.NET - 打印 RDLC 报告而不显示 ReportViewer 控件
这里是LocalReport的Print扩展方法的VB版本:
Imports Microsoft.Reporting.WinForms
Imports System.Drawing.Imaging
Imports System.Drawing.Printing
Imports System.IO
Imports System.Runtime.CompilerServices
Public Module LocalReportExtensions
<Extension()>
Sub Print(ByVal report As LocalReport)
Dim pageSettings = New PageSettings()
pageSettings.PaperSize = report.GetDefaultPageSettings().PaperSize
pageSettings.Landscape = report.GetDefaultPageSettings().IsLandscape
pageSettings.Margins = report.GetDefaultPageSettings().Margins
Print(report,pageSettings)
End Sub
<Extension()>
Sub Print(ByVal report As LocalReport,ByVal pageSettings As PageSettings)
Dim deviceInfo As String = $"<DeviceInfo>
<OutputFormat>EMF</OutputFormat>
<PageWidth>{pageSettings.PaperSize.Width * 100}in</PageWidth>
<PageHeight>{pageSettings.PaperSize.Height * 100}in</PageHeight>
<MarginTop>{pageSettings.Margins.Top * 100}in</MarginTop>
<MarginLeft>{pageSettings.Margins.Left * 100}in</MarginLeft>
<MarginRight>{pageSettings.Margins.Right * 100}in</MarginRight>
<MarginBottom>{pageSettings.Margins.Bottom * 100}in</MarginBottom>
</DeviceInfo>"
Dim warnings() As Warning
Dim streams = New List(Of Stream)()
Dim currentPageIndex = 0
report.Render("Image",deviceInfo,Function(name,fileNameExtension,encoding,mimeType,willSeek)
Dim stream = New MemoryStream()
streams.Add(stream)
Return stream
End Function,warnings)
For Each stream As Stream In streams
stream.Position = 0
Next
If streams Is Nothing OrElse streams.Count = 0 Then
Throw New Exception("Error: no stream to print.")
End If
Dim printDocument = New PrintDocument()
printDocument.DefaultPageSettings = pageSettings
If Not printDocument.PrinterSettings.IsValid Then
Throw New Exception("Error: cannot find the default printer.")
Else
AddHandler printDocument.PrintPage,Sub(sender,e)
Dim pageImage As Metafile = New Metafile(streams(currentPageIndex))
Dim adjustedRect As Rectangle = New Rectangle(
e.PageBounds.Left - CInt(e.PageSettings.HardMarginX),e.PageBounds.Top - CInt(e.PageSettings.HardMarginY),e.PageBounds.Width,e.PageBounds.Height)
e.Graphics.FillRectangle(Brushes.White,adjustedRect)
e.Graphics.DrawImage(pageImage,adjustedRect)
currentPageIndex += 1
e.HasMorePages = (currentPageIndex < streams.Count)
e.Graphics.DrawRectangle(Pens.Red,adjustedRect)
End Sub
AddHandler printDocument.EndPrint,Sub(Sender,e)
If streams IsNot Nothing Then
For Each stream As Stream In streams
stream.Close()
Next
streams = Nothing
End If
End Sub
printDocument.Print()
End If
End Sub
End Module
要使用上述代码,只需在 Print
上调用 LocalReport
扩展方法即可。例如,如果您有一个(可见或不可见的 ReportViewer):
Me.ReportViewer1.LocalReport.Print()
如果您想传递打印机设置:
Me.ReportViewer1.LocalReport.Print(ReportViewer1.GetPageSettings())