Question

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();
        }
    }
}

在 Reza Aghaei 提到的 C# 中，函数被调用

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。

Answer 1

_{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())

VB.NET - 打印 RDLC 报告而不显示 ReportViewer 控件

1 个答案:

VB.NET - 打印 RDLC 报告而不显示 ReportViewer 控件