问题
On Windows, is there a way to create a cmd shell and set certain file type associations within it's scope and not affect system-wide file association. I'd like to launch a .bat file to open a shell with it's own defined file type association.... Something like this pseudo .bat file:
[my_shell.bat]
@echo off
~ASSOCIATE .jpg --> Google Image Viewer.exe
~ASSOCIATE .tga --> Adobe Photoshop
~ASSOCIATE .txt --> Komodo Edit
start cmd
And so, for example, any .txt file i'd open from the resulting shell would open in Komodo Edit, while double clicking a .txt file on my desktop would open it with whatever system-wide file association is defined, like notepad.
回答1:
That can be done with assoc and ftype
assoc .jpg=picture
ftype picture="C:\Program Files (x86)\IrfanView\i_view32.exe" "%1"
(note the output of assoc .jpg and ftype WhateverYouUseAsName before so that you are able to revert it, if needed)
回答2:
This doesn't solve the problem entirely and requires some system wide modifications but at least you can get local scope associations. You can do this by associating the file type to an environment variable and then modify the environment variable in the current cmd scope.
We had the same issue for python files and solved it like this. So first set the file assocation to a variable path.
ftype Python.File=%PYTHON%\python.exe "%1" %*
and then in the local cmd scope you set the environment variable to the appropriate value.
set PYTHON=C:\Python27\2.7.9
来源：https://stackoverflow.com/questions/21943629/set-and-limit-file-type-association-within-the-scope-of-a-cmd-shell