Question

I’m using Microsoft.Office.Interop.Excel in VB.Net in order to export an .xls file as a .pdf file. This was the only method I could find without relying on third party software to be installed on the running machine or using an expensive add-on to Visual Studio. This method requires opening excel and saving a file through the code.

My problem is that I only have a trial version of Microsoft office as I never actually use it. Well the limitation of times I can open it is up as I have run the program enough times for debugging purposes and now I can’t continue development on this application. Is there a development kit for visual studio that provides the API I need for this functionality without actually having Office installed? I don’t need Microsoft Office so I don’t want to have to buy a full version just to develop and test an application.

I’ve looked at some options like this, but there is very specific formatting that needs to remain intact in the .xls for the conversion to .pdf that doesn’t seem to work if I use an intermediary format.

I’ve also read a little bit about the openOffice API, but is that compatible with .Net? If so, can someone point me to a tutorial that explains how to use the API with .Net? Specifically VB if possible, but I can work with C# code.

Here is a sample of what I am trying to do, in case it helps with suggestions:

        Dim fileName As String = AppDomain.CurrentDomain.BaseDirectory & "LOA " & compName.Text & ".xls"
        Dim xlsApp = New Microsoft.Office.Interop.Excel.Application
        xlsApp.ScreenUpdating = False
        Dim xlsBook As Microsoft.Office.Interop.Excel.Workbook
        Dim paramExportFormat As XlFixedFormatType = XlFixedFormatType.xlTypePDF
        Dim paramExportQuality As XlFixedFormatQuality = XlFixedFormatQuality.xlQualityStandard
        Dim paramOpenAfterPublish As Boolean = False
        Dim paramIncludeDocProps As Boolean = True
        Dim paramIgnorePrintAreas As Boolean = True
        Dim paramFromPage As Object = Type.Missing
        Dim paramToPage As Object = Type.Missing
        xlsBook = xlsApp.Workbooks.Open(fileName, UpdateLinks:=False, ReadOnly:=False)
        xlsBook.ExportAsFixedFormat(paramExportFormat, AppDomain.CurrentDomain.BaseDirectory & "LOA " & compName.Text & ".pdf", paramExportQuality, paramIncludeDocProps, paramIgnorePrintAreas, paramFromPage, paramToPage, paramOpenAfterPublish)
        xlsBook.Close(SaveChanges:=False)
        xlsApp.Quit()

Answer 1

You can install Microsoft Primary Interop Assemblies Package. You can find it here

But be careful. There are different packages for different office versions.