使用 COM 自动化时 Excel 迷你图未导出为 PDF
我在以编程方式将包含迷你图的 Excel 工作表导出为 PDF 格式时遇到问题。
当我使用 Excel 2010 的本机 PDF 导出工具手动将 Excel 工作表导出为 PDF 格式时,一切工作正常,但当我使用简单的 COM 自动化执行此操作时,除了包含迷你图的单元格之外,所有内容都导出为 PDF。
奇怪的是,当我向 Excel 工作表添加一些数据条时,数据条附近的迷你图突然被导出,但距离数据条较远的迷你图却没有导出。
我已经在多个不同的机器和操作系统上验证了这些问题。这可能与 StackOverflow 上的以下问题有关。
我正在使用以下非常直接的 VB.NET 代码。我尝试过使用各种设置和变量,但没有运气。
Public Class Form1
Enum XlFixedFormatType
xlTypePDF = 0
xlTypeXPS = 1
End Enum
Enum XlUpdateLinks
xlUpdateLinksUserSetting = 1
xlUpdateLinksNever = 2
xlUpdateLinksAlways = 3
End Enum
Enum XlFixedFormatQuality
xlQualityStandard = 0
xlQualityMinimum = 1
End Enum
Private Sub buttonConvert_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles buttonConvert.Click
Dim pdf As String = Convert("C:\Sparkline.xlsx")
Process.Start(pdf)
End Sub
Public Function Convert(ByVal fileName As String) As String
Dim outPutFilename As String, printObject As Object = Nothing
Dim app As Object '** In reality this is a Microsoft.Office.Interop.Excel.Application
Dim doc As Object '** In reality this is a Microsoft.Office.Interop.Excel.Workbook
app = CreateObject("Excel.Application")
'** Open the _document
doc = app.Workbooks.Open(fileName:=fileName, _
UpdateLinks:=XlUpdateLinks.xlUpdateLinksNever, _
ReadOnly:=True, _
AddToMru:=False, _
IgnoreReadOnlyRecommended:=True, _
CorruptLoad:=True, _
Editable:=False)
'** Set visible sheets depending on selected range
printObject = app.ActiveWorkbook.ActiveSheet
'** Write the file under the same name, but with different extension
outPutFilename = System.IO.Path.ChangeExtension(fileName, "pdf")
printObject.ExportAsFixedFormat(Type:=XlFixedFormatType.xlTypePDF, _
fileName:=outPutFilename, _
quality:=XlFixedFormatQuality.xlQualityStandard, _
IncludeDocProperties:=False, _
IgnorePrintAreas:=False, _
OpenAfterPublish:=False)
doc.Close(False)
app.Quit()
'** Return the name of the converted file
Return outPutFilename
End Function
End Class
I am having a problem programmatically exporting Excel sheets that contain sparklines to PDF format.
When I manually export the Excel sheet to PDF format using Excel 2010's native PDF Exporting facility then everything works fine, but the moment I do it using simple COM automation then everything is exported to PDF with the exception of cells containing sparklines.
The weird thing is that when I add a few data bars to the excel sheet then the sparklines near the data bars are suddenly exported, but the ones further away from the data bars are not.
I have verified these problems on multiple different machines and operating systems. This may be related to the following question on StackOverflow.
I am using the following, very straight forward, VB.NET code. I have tried playing around with the various settings and variables, but no luck.
Public Class Form1
Enum XlFixedFormatType
xlTypePDF = 0
xlTypeXPS = 1
End Enum
Enum XlUpdateLinks
xlUpdateLinksUserSetting = 1
xlUpdateLinksNever = 2
xlUpdateLinksAlways = 3
End Enum
Enum XlFixedFormatQuality
xlQualityStandard = 0
xlQualityMinimum = 1
End Enum
Private Sub buttonConvert_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles buttonConvert.Click
Dim pdf As String = Convert("C:\Sparkline.xlsx")
Process.Start(pdf)
End Sub
Public Function Convert(ByVal fileName As String) As String
Dim outPutFilename As String, printObject As Object = Nothing
Dim app As Object '** In reality this is a Microsoft.Office.Interop.Excel.Application
Dim doc As Object '** In reality this is a Microsoft.Office.Interop.Excel.Workbook
app = CreateObject("Excel.Application")
'** Open the _document
doc = app.Workbooks.Open(fileName:=fileName, _
UpdateLinks:=XlUpdateLinks.xlUpdateLinksNever, _
ReadOnly:=True, _
AddToMru:=False, _
IgnoreReadOnlyRecommended:=True, _
CorruptLoad:=True, _
Editable:=False)
'** Set visible sheets depending on selected range
printObject = app.ActiveWorkbook.ActiveSheet
'** Write the file under the same name, but with different extension
outPutFilename = System.IO.Path.ChangeExtension(fileName, "pdf")
printObject.ExportAsFixedFormat(Type:=XlFixedFormatType.xlTypePDF, _
fileName:=outPutFilename, _
quality:=XlFixedFormatQuality.xlQualityStandard, _
IncludeDocProperties:=False, _
IgnorePrintAreas:=False, _
OpenAfterPublish:=False)
doc.Close(False)
app.Quit()
'** Return the name of the converted file
Return outPutFilename
End Function
End Class
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我已与 Microsoft 支持联系,他们承认这是一个错误。产品团队正在考虑将其包含在未来的服务包中。
在此之前,在执行导出之前使应用程序可见即可解决问题。如果您不希望用户看到它,则可以将窗口放置在屏幕之外。
I have been in contact with Microsoft Support and they have acknowledged it is a bug. The product team is looking at it for inclusion in a future service pack.
Until then, making the Application Visible before carrying out the export will solve the problem. If you don't want the user to see it then you can position the window off screen.