How to read and store speaker notes from PowerPoint presentation file

Question

How to read and store speaker notes from PowerPoint presentation file that is stored in my hard drive location?

using Microsoft.Office.Interop.PowerPoint;

Application PowerPoint_App = new Application();
Presentations multi_presentations = PowerPoint_App.Presentations;
Presentation presentation = multi_presentations.Open(@"D:\Peak Sourcing\Work\ppt_test\presenting.ppt");

Answer 1

Each slide in the presentation's Slides collection has a NotePage member. The NotesPage is basically a separate slide with all the same collections and methods. Here's a VBA function that will return the notes text from a slide:

Function NotesText(oSl As Slide) As String

    Dim oSh As Shape
    
    For Each oSh In oSl.NotesPage.Shapes
        If oSh.Type = msoPlaceholder Then
            If oSh.PlaceholderFormat.Type = ppPlaceholderBody Then
                If oSh.TextFrame.HasText Then
                    NotesText = oSh.TextFrame.TextRange.Text
                End If
            End If
        End If
    Next

End Function