a generic error occurred in gdi+. while saving an image - asp.net

Question

Dear Expert i am getting an error while saving an image the code is as follows
ClsImageManager objImgManager = new ClsImageManager();
Bitmap ImageBitmap = objImgManager.GetBitmapFromBytes(ImageData);
Response.ContentType = "image/tiff";
ImageBitmap.Save(Response.OutputStream, ImageFormat.Tiff);
ImageBitmap.Dispose();
Response.End();
when i used Image.format.jpeg the code is working good but when i changes it to ImageFormat.Tiff then i am getting an error a generic error occurred in gdi+.

Answer 1

You should note that GDI/GDI+ (System.Drawing namespace) is not officially supported in ASP.NET - see "Caution" in http://msdn.microsoft.com/en-us/library/system.drawing.aspx.
WIC is supposed to be used instead GDI+ (see http://weblogs.asp.net/bleroy/archive/2009/12/10/resizing-images-from-the-server-using-wpf-wic-instead-of-gdi.aspx)
Said that, many had successfully use GDI+ in ASP.NET. Most probably, you should attempt saving image into memory stream (or on file) and then writing saved image into the response. See this link for details: http://www.west-wind.com/weblog/posts/2006/Oct/19/Common-Problems-with-rendering-Bitmaps-into-ASPNET-OutputStream
Another work-around can be related to user account. Apparently, GDI/GDI+ is bound to device context (screen, printer etc) and they may not be available under service accounts. So you may try running your ASP.NET code on some normal user account if that helps or not.

Answer 2

You may need to try explicitly encoding the image save.
Have a look at the code example at the bottom of this MSDN documentation on Image.Save
Image.Save Method (String, ImageCodecInfo, EncoderParameters)
The same actions can be applied to your save.
However, it could also possibly be that your objImgManager is disposing of the buffer where the image is stored before you can save it.
Bitmap ImageBitmap = objImgManager.GetBitmapFromBytes(ImageData);
You can get around this by creating a copy of the image by doing this:
Bitmap ImageBitmap = new Bitmap(objImgManager.GetBitmapFromBytes(ImageData));