file-association

Is there an easy way to determine what a file is by its extension in C#? For example if I pass a file extension of ".txt" then it will return "Text Document" or if I pass it ".pdf" it will return "Adobe Acrobat Reader". I see this behavior built into Windows Explorer, under the "Type" column. Is there a way to mimic this in C#? If you want to get what explorer actually shows and are willing to use COM inter-op you can use the Shell.Application class to get it with the minimum amount of code. If you go to add a reference, browse to X:\windows\system32\shell32.dll that will import shell32's type

What is the reason virtualenv does not associate .py(w) files with virtualenv's version of Python executables? This seems like an ideal task for virtualenv on Windows taking into consideration that there's no mechanism like shebang on Windows. File type associations are handled in the Windows registry. The virtualenv activate script would have to modify the registry keys and the deactivate script would need to restore the previous value (or risk breaking the associations). What happens if you activate a virtualenv, open a second instance of cmd.exe, and activate a different virtualenv? Unless

I'm aiming to create a new file extension (possibly more than one) for a program I'm creating. So, after looking around for a bit, I found a number of sources on the subject, listed below, just in case anyone wants to look at them and get the general idea of what I have been looking at. Utilising a file association in a Java application Create registry entry to associate file extension with application in C++ Associating file extensions with a program http://support.microsoft.com/?scid=kb%3Ben-us%3B185453&x=6&y=11 http://www.rgagnon.com/javadetails/java-0592.html http://www.rgagnon.com

So many programs feature a list of possible extensions and protocols under the "Default Programs" control panel applet. "Set Default PRograms", more precisely. (Vista & 7) I wish to add my programs in that list and set some extensions that it can handle. One more thing. My program supports addons for opening more files, so that list should be dynamic (I can add more extensions or even protocols at any time) By the way, yes, I know, this is not exactly a programming question. It'd be my humble guess that it's a registry question. So UAC will not be an issue! The registry keys required to

How can I make a Python script to be a specific file type's (e.g., *.foo) default application? As in, when I double click the file in the Finder / Explorer I want the file to open in the Python script. Is this possible to do in Win and/or OS X? The application is a PySide app if that matters. Mac OS X On Mac OS X you can use Automator to create an application that calls your python app and passes the input file path as a string argument. In the application workflow wizard, add action "Run Shell Script", select Pass input: as as arguments , and in the text box add: python /path/to/my/app/myapp