Parameter is not valid. when running SlideEx.GetThumbnail(scaleX- scaleY);

Aspose.Slides Product Family
1

I am getting this error

Source: System.Drawing
Message: Parameter is not valid.
Stack trace: at System.Drawing.Bitmap..ctor(Int32 width, Int32 height, PixelFormat format)
at System.Drawing.Bitmap..ctor(Int32 width, Int32 height)
at Aspose.Slides.Pptx.SlideEx.GetThumbnail(Single scaleX, Single scaleY)
at Granicus.Website.Core.SlidesHandler.ProcessRequest(HttpContext context) in c:\SFODEV01\Granicus\Feature\Ecomments\Source\MediaManager\Src\WebSite.Core\App_Code\SlidesHandler.cs:line 94

when I run this code:

string pptPath = @"C:\test.pptx";

PresentationEx presEx = new PresentationEx(pptPath);

foreach (SlideEx slide in presEx.Slides)

{

float scaleX = 640;

float scaleY = 480;

Image img = slide.GetThumbnail(scaleX, scaleY);

string documentDirectory = @"c:\temp";

string imgPath = Path.Combine(documentDirectory, slideAttachment.FileName);

img.Save(imgPath, ImageFormat.Jpeg);

}

The exception happens when the code runns this line:

Image img = slide.GetThumbnail(scaleX, scaleY);

I am using Aspose.Slides 4.0 on windows xp. This is a .Net 3.5 web applicaiton.

Please help.


Thanks,

Adam

2

slideAttachment.FileName is valid at this point, but the exception happens befor that anyway.

3

This is also happening when I run Slide.GetThumbnail for ppt documents. Not just SlideEx.GetThumbnail for pptx documents. The same exception is happening for both.

Please help me.

4

Hi Adam,

Please use GetThumbnail(1f, 1f) instead, that means creating image of a slide with 720x540 resolution which is the standard size of pptx slide. For more details on the same issue, visit this thread.