System.Drawing.Bitmap.FromResource throwing System.ArgumentException 
Author Message
 System.Drawing.Bitmap.FromResource throwing System.ArgumentException

I am having trouble with System.Drawing.Bitmap.FromResource.  It takes an
IntPtr called hinstance, which is supposed to be a handle to a file
containing the desired bitmap resource.  If I use the following code, I get
an exception on the line calling FromResource():

FileStream fs = new FileStream(
    Application.ExecutablePath, FileMode.Open, FileAccess.Read,
Bitmap bmpFromResource = Bitmap.FromResource(fs.Handle, "image"); //
Exception thrown here.

Unhandled Exception: System.ArgumentException: Invalid parameter used.
   at System.Drawing.Bitmap.FromResource(IntPtr hinstance, String
   at BitmapSnippet.BitmapClass..ctor() in d:\bitmapclass.cs:line 358
   at EntryPoint.Main(String[] args) in d:\bitmapclass.cs:line 454

- If a FileStream.Handle is inappropriate, where should I get the
appropriate instance handle to pass to this method?
- If FileStream.Handle is the right place to get hinstance, why isn't it

Here's what I know:
- The Application.ExecutablePath points to the exe's own path & filename.
- The fact that the program is accessing its own exe does not seem to be the
problem because I tried copying the exe and pointing to the twin and I get
the same exception.
- The method in question is documented at
- The following code works in the same class, so I know the resource is in
the exe.

System.Resources.ResourceManager resources = new
    System.Resources.ResourceManager(typeof(BitmapClass)); // BitmapClass is
the name of this code's containing class.
Bitmap bmpFromResource = (Bitmap)(resources.GetObject("image"));


Tue, 27 Jan 2004 09:15:45 GMT  
 [ 1 post ] 

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