Hi.
I'm trying to generate thumbnails from a PPTX file uploaded on aspx page.
I'm using the following code and I'm receiving the error : "Parameter is not valid" on line slide.GetThumbnail.
Dim pres As New Aspose.Slides.Pptx.PresentationEx(pptStream)
For iContSlides As Integer = 0 To pres.Slides.Count - 1
Dim slide As Aspose.Slides.Pptx.SlideEx = pres.Slides(iContSlides) ' .GetSlideByPosition(iContSlides)
Dim imagePreview As Drawing.Bitmap = slide.GetThumbnail(290.0F, 230.0F)
imagePreview.Save(imgStream, Drawing.Imaging.ImageFormat.Jpeg)
next
Any help??
My similar code for PPT files is working perfectally.
Dim pres As New Aspose.Slides.Presentation(pptStream)
For iContSlides As Integer = 1 To pres.Slides.Count
Dim slide As Aspose.Slides.Slide = pres.GetSlideByPosition(iContSlides)
Dim imagePreview As Drawing.Image = slide.GetThumbnail(New Size(290, 230))
imagePreview.Save(imgStream, Drawing.Imaging.ImageFormat.Jpeg)
Best regards,
Ésio Nunes