Another programming challenge, how to get the text from a PowerPoint file. Well, I am currently using Office automation to get the data, this isn't a permanent solution but will do for now. I am only having trouble with password protected (Read-only mode) files. This is better outlined in a newsgroup thread at MSDN.
Here is my request:
I am trying to do some background processing on PowerPoint 2003 presentation
files using the automation interface through Visual Basic .NET. When the
process accesses write protected (password) files, a prompt is being shown
requesting the password or readonly, I would like to avoid this. I am
specifying readonly in the open method. The other issue is when I close the
file, even when readonly is selected, I get a COMException of "Presentation
(unknown memeber): Invalid Request. Presentation cannot be modified."
Here is the code
Dim m_PowerPointApp As PowerPoint.ApplicationClass
Dim presentation As PowerPoint.Presentation
m_PowerPointApp = New PowerPoint.ApplicationClass
m_powerpointIsOpen = True
' Do some reading stuff (nothing is changed)
presentation.Close() ' <-- Here is where the error occurrs
Thanks in advance for any ideas or the solution to this issue. I am running
Office 2003 SP1 on Windows XP SP2. Developing in Visual Studio .NET 2003.