[Python.NET] How to use BitmapSource from System.Windows.Media.Imaging ?

[brad at fie.us]

You should be wary of that hard coded path.

My best guess as to why the namespace is not provided is that the .net framework that is being loaded is pre .net 3.0.  I think python.net compiles to 2.0 by default but I'd need to check that.

That Windows.Media.Imaging namespace only became available in .net 3.0 onward.

To do this properly, you'd likely be looking to compile or use python.net in a mode that brings in the standard libs for .net 3.0 or higher.  Then it should just be available in the GAC for that .net version.

Distributing a python script with .net dependencies can get rather ugly.

-brad

On Jan 21, 2013, at 2:10 PM, Daniel Krause <m.daniel.krause at googlemail.com> wrote:

> Hi Jojo,
> 
> thanks for your help.
> 
> The following code is running (64bit-Windows):
> 
> import clr
> import sys
> sys.path.append("C:\\Windows\\Microsoft.NET\\Framework64\\v4.0.30319\\WPF")
> clr.AddReference("PresentationCore")
> from System.Windows.Media.Imaging import BitmapSource
> bitmapsrc = BitmapSource
> print bitmapsrc
> 
> Console output:
> <class 'System.Windows.Media.Imaging.BitmapSource'>
> 
> Best regards
> Daniel
> 
> 
> 2013/1/21 Jojo Maquiling <jojo.maquiling at kadjo.org>
> Hi,
> In C#, the System.Windows.Media can just be shown if you add the
> "PresentationCore" as part of your reference. The path of
> PresentationCore.dll is in C:\Program Files (x86)\Reference
> Assemblies\Microsoft\Framework\v3.0 if you are using Visual Studio
> 2008. I think that might help if you add that as your reference in
> clr.AddReference. I found some explanation in here -
> http://social.msdn.microsoft.com/Forums/en-US/windowswic/thread/fdfff143-c1ae-41cd-bbeb-8ff6c1c879ec
> I believe this will help you.
> 
> HTH
> 
> Thanks and best regards,
> 
> Jojo Maquiling
> 
> On Mon, Jan 21, 2013 at 3:40 AM, Daniel Krause
> <m.daniel.krause at googlemail.com> wrote:
> > I want to use BitmapSource from System.Windows.Media.Imaging
> > (Documentation here:
> > http://msdn.microsoft.com/de-de/library/system.windows.media.imaging.bitmapsource(v=vs.100).aspx
> > )
> >
> > It would be great if someone could help me with this, as I do not have yet
> > much experience with python for .NET, and none at all with .NET itself.
> >
> > My test script:
> >
> > import clr
> > clr.AddReference("System.Windows")
> > import System.Windows
> > bitmap = System.Windows.Media.Imaging.BitmapSource()
> >
> > The interpreter info is:
> > Traceback (most recent call last):
> >   File "C:\Users\mdk\workspace\testbitmap.py", line 4, in <module>
> >     bitmapsrc = System.Windows.Media.Imaging.BitmapSource()
> > AttributeError: Media
> >
> > I tried also:
> >
> > import clr
> > clr.AddReference("System.Windows.Media")
> > import System.Windows
> > bitmapsrc = System.Windows.Media.Imaging.BitmapSource()
> >
> >
> > Traceback (most recent call last):
> >   File "C:\Users\mdk\workspace\testbitmap.py",
> > line 2, in <module>
> >     clr.AddReference("System.Windows.Media")
> > System.IO.FileNotFoundException: Unable to find assembly
> > 'System.Windows.Media'.
> >    bei Python.Runtime.CLRModule.AddReference(String name)
> >
> > And I also tried:
> >
> > import clr
> > clr.AddReference("System.Windows")
> > from System.Windows import Media
> > bitmapsrc = Media.Imaging.BitmapSource()
> >
> > Traceback (most recent call last):
> >   File
> > "C:\Users\mdk\workspace\lr_control\src\lr_control\camera\testbitmap.py",
> > line 3, in <module>
> >     from System.Windows import Media
> > ImportError: cannot import name Media
> >
> > _________________________________________________
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