I have a textbox on the 3rd slide of my presentation. This textbox is not on the Master Slide, it is specific to this slide. It comes up as an Aspose.Powerpoint.Placeholder with PlaceholderType = PlaceholderType.Body. When I try to cast this as a TextHolder…it errors out saying it was an invalid cast. I am performing the cast like this:
TextHolder th = (TextHolder)pl;
where pl is the placeholder object. Any ideas why this won’t work?
Dear Michael,
So placeholder was not recognized as textholder.
I should have real ppt to tell exactly why it happened.
Possible reason is PowerPoint wrote text of placeholder to the linked textframe.