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Re: how to save a mathematica-made imagebox.image as jpg, gif, bmp in c#/.netlink?


Not quite related to the question asked,
rather some shot in the darkness.

If the goal is to save graphics as a file,
you could ask Mathematice via NetLink to
do so.

The following few lines indicate what I mean.

IKernelLink ml = MathLinkFactory.CreateKernelLink();
ml.Evaluate("SetDirectory["+
   "\"C:/Documents and/Settings/User/Desktop/\""+
"];");
ml.Evaluate("gr = Plot[ Sin[x], {x, 0, 2*Pi}];");
ml.Evaluate("Export[\"test.jpg\",gr, \"JPEG\"]");
ml.Close();

Sasha

cdj wrote:
> Hi all,
> 
> This has been buggin me for awhile... I'm sure I'm doing something
> silly, but I can't figure out what....
> 
> It suffices to consider the following problem:
> 
> (1) Use the mathematica-supplied c# example (let's you enter a Mathematica
> statement, compute, and captures output.)
> 
> How to save a graphicsBox.Image to a file, say as a jpg?
> 
> There's standard code that is available on msdn, to wit:
> 
> (2) http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vbcon/html/vbtsksavingfilesusingsavefiledialogcomponent.asp
> 
> When I try to join these 2 bits of code together, I get a totally
> uninformative GDI+ error of some sort.
> 
> I'm under the impression that the problem is that the Mathematica graphic
> isn't being assigned to the picturebox in the "normal" way, or some
> such thing. The reason I have this impression is that while the
> following code-bits are quite similar, I can save with one, but not
> with the other:
> 
> (a) graphicsBox.Image = mathKernel.Graphics[0];
> 
> (b) graphicsBox.Image = Image.FromFile("pathtomyfile.jpg");
> 
> Can anybody explain to me why the msdn routine works fine with (b),
> but not with (a)?
> 
> I've been brief here with the description of my problem - I'm happy to
> expand a bit on anything above, if it would be helpful....
> 
> thx much for any insights,
> 
> cdj
> 

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