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21

answers:

1
+1  Q: 

How do I convert System__ComObject to an image?

I'm using DSOFile to get the summary properties from some Crystal Reports report files. SummaryProperties.Thumbnail returns an object and I need to convert the object to an image so I can display it as a preview on my form. I have tried casting it to a System.Drawing.Image but I get an error "ImageConverter cannot convert from System.__ComObject."

+2  A: 

It would be a COM interface for images, IPicture or IPictureDisp, probably. You could use the AxHost.GetPictureFromIPicture or GetPictureFromIPictureDisp static method to make the conversion.

Hans Passant  2010-07-27 17:08:29
It took some more googling to find out I had to implement AxHost to use the GetPictureFromIPicture method, but I got it, thanks.
Beaner  2010-07-27 18:01:30

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