A generic error occurred in GDI+

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Hello,
I'm using that code below to get the text from a hidden file that contains the string of an SVG tag in the ASPX file

then I used the SVG library to get a bitmap image out of this SVG text
the function Draw() returned a bitmap image just fine but whenever I try to save that bitmap I get the error stated above
any idea what might be the problem is??
I set the temp folder permissions to full control for everyone and as you can see I'm sure that the stream is still open while I try to save the file

C#

string svgText = HttpUtility.UrlDecode(svgHolder.Value, System.Text.Encoding.Default);
using (MemoryStream stream = new MemoryStream(Encoding.UTF8.GetBytes(svgText)))
{
    var svg = SvgDocument.Open<SvgDocument>(stream);
    Bitmap image = svg.Draw();
    image.Save("~/img/temp/temp.bmp");
}

Posted 28-Sep-15 12:11pm

Scarnet

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Matt T Heffron 28-Sep-15 20:22pm

Wrap the image.Save() in a try/catch and look at the exception in the debugger for any additional information that may be there... (E.g., is it a System.Runtime.InteropServices.ExtenalException ? That has an Hresult property that could provide additional info.)

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OriginalGriff · Answer 1 · 2015-09-28T20:16:00

There are loads of ways to cause this, but in your case, it's almost certainly becais ethe path is invalid: Bitmap.Save expects a "normal" windows path, not an IIS based path descriptor.

Try this:

C#

image.Save(Server.MapPath("~/img/temp/temp.bmp"));

And make sure that the "img" and "temp" folders do exist.

In the longer term, web based code should never refer to "fixed" file names, as they are inherently running in multiuser environments. There is a very good chance that the next user will immediately overwrite your file!