使用 Office.Interop.Excel 将文件另存为 PDF/A

Question

如何将 Excel 电子表格导出为 PDF/A (ISO 19005-1)？

编辑：我要求 PDF/A， 而不是 普通的旧 PDF 1.5，因为它默认导出。我什至在我原来的问题中强调了 A。

我已经可以使用 ExportAsFixedFormat() 函数将 Word 和 PowerPoint 文档导出到 PDF/A，因为 Word 和 PowerPoint 函数都有一个可选的 UseISO19005_1 参数，但是 Excel 版本非常不同，缺少很多参数。

我似乎找不到使用 COM Interop 导出 PDF/A 的方法。

这是我用来从 docx 导出的代码：

Dim ExportFormat As WdExportFormat = WdExportFormat.wdExportFormatPDF
Dim OpenAfterExport As Boolean = False
Dim OptimizeFor As WdExportOptimizeFor = WdExportOptimizeFor.wdExportOptimizeForPrint
Dim Range As WdExportRange = WdExportRange.wdExportAllDocument
Dim Item As WdExportItem = WdExportItem.wdExportDocumentWithMarkup
Dim IncludeDocProps As Boolean = True
Dim KeepIRM As Boolean = False
Dim CreateBookmarks As WdExportCreateBookmarks = WdExportCreateBookmarks.wdExportCreateWordBookmarks
Dim DocStructureTags As Boolean = True
Dim BitmapMissingFonts As Boolean = True
Dim UseISO19005_1 As Boolean = False

If exportPDFA Then
    UseISO19005_1 = True
    Dim wordApp As New Word.Application()
    Dim doc As Word.Document = wordApp.Documents.Open(FileName)
    doc.ExportAsFixedFormat(pathToDestFile, ExportFormat, OpenAfterExport, OptimizeFor, Range, 0, 0, Item, IncludeDocProps, KeepIRM, CreateBookmarks, DocStructureTags, BitmapMissingFonts, UseISO19005_1)
End If

但对于 xlsx，ExportAsFixedFormat() 函数接受非常不同的参数（这是直接取自 Microsoft.Office.Interop.Excel class）：

Sub ExportAsFixedFormat(Type As XlFixedFormatType, Optional Filename As Object = Nothing, Optional Quality As Object = Nothing, Optional IncludeDocProperties As Object = Nothing, Optional IgnorePrintAreas As Object = Nothing, Optional From As Object = Nothing, Optional [To] As Object = Nothing, Optional OpenAfterPublish As Object = Nothing, Optional FixedFormatExtClassPtr As Object = Nothing)

Answer 1

使用以下方法将 excel 转换为 pdf，如果有效则标记为答案

Public Function ExportWorkbookToPdf(ByVal workbookPath As String, ByVal outputPath As String) As Boolean

    ' If either required string is null or empty, stop and bail out
    If String.IsNullOrEmpty(workbookPath) OrElse String.IsNullOrEmpty(outputPath) Then
        Return False
    End If

    ' Create COM Objects
    Dim excelApplication As Microsoft.Office.Interop.Excel.Application
    Dim excelWorkbook As Microsoft.Office.Interop.Excel.Workbook

    ' Create new instance of Excel
    excelApplication = New Microsoft.Office.Interop.Excel.Application()

    ' Make the process invisible to the user
    excelApplication.ScreenUpdating = False

    ' Make the process silent
    excelApplication.DisplayAlerts = False

    ' Open the workbook that you wish to export to PDF
    excelWorkbook = excelApplication.Workbooks.Open(workbookPath)

    ' If the workbook failed to open, stop, clean up, and bail out
    If excelWorkbook Is Nothing Then
        excelApplication.Quit()

        excelApplication = Nothing
        excelWorkbook = Nothing

        Return False
    End If

    Dim exportSuccessful = True
    Try
        ' Call Excel's native export function (valid in Office 2007 and Office 2010, AFAIK)
        excelWorkbook.ExportAsFixedFormat(Microsoft.Office.Interop.Excel.XlFixedFormatType.xlTypePDF, outputPath)
    Catch ex As System.Exception
        ' Mark the export as failed for the return value...

        ' Do something with any exceptions here, if you wish...
        ' MessageBox.Show...        
        exportSuccessful = False
    Finally
        ' Close the workbook, quit the Excel, and clean up regardless of the results...
        excelWorkbook.Close()
        excelApplication.Quit()

        excelApplication = Nothing
        excelWorkbook = Nothing
    End Try

    ' You can use the following method to automatically open the PDF after export if you wish
    ' Make sure that the file actually exists first...
    If System.IO.File.Exists(outputPath) Then
        System.Diagnostics.Process.Start(outputPath)
    End If

    Return exportSuccessful
End Function

Answer 2

Excel 允许用户在保存对话框的选项中选择是否将文件另存为 PDF/A。此设置在 HKEY_CURRENT_USER\Software\Microsoft\Office.0\Common\FixedFormat 下作为 LastISO19005-1 (REG_DWORD) 存储在注册表中。（将 12.0 替换为正确的版本。）ExportAsFixedFormat 函数也遵守此设置。您可以在调用 ExportAsFixedFormat 以获取 Excel 将文件导出为 PDF/A.

之前将此值设置为 1

我知道这个解决方案并不完美，因为它使用全局状态来解决局部问题。完成后考虑恢复之前的值。

使用 Office.Interop.Excel 将文件另存为 PDF/A

Save file as PDF/A using Office.Interop.Excel

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