如何燮preSS“打开方式”窗口 [英] How to suppress 'Open with' window

问题描述

在运行里面有一个未知的扩展名的文件（可以说 test.nope ）的命令行或批处理文件 - 使用测试。都能跟得上，呼叫test.nope 或启动test.nope - 你是$ p $有一个窗口psented要求您选择你想用来打开此文件的程序（在Windows 7中，presumably大多数Windows操作系统的）。

When running a file which has an unknown extension (lets say test.nope) from the command line or a batch file - using test.nope, call test.nope or start test.nope - you are presented with a window asking you to "Choose the program you want to use to open this file" (in Windows 7, presumably in most Windows OS's).

是否有可能燮preSS这个窗口？

我最初的想法是，以检查是否在％PATHEXT％变量存在扩展试图打开文件之前。但是，这不包含的所有的已知文件的扩展。例如，尽管的.py 扩展名是不是在我的％PATHEXT％变量，Python脚本仍然正确打开。

My initial thought was to check if the extension exists in the %PATHEXT% variable before attempting to open the file. However, this does not contain all known file extensions. For example, though the .py extension is not in my %PATHEXT% variable, Python scripts are still opened correctly.

推荐答案

文件类型在 HKCR \\ 注册（的，可以从MSDN 完整的文档）。你可以找出是否一个类型是通过检查密钥是否存在注册。在一个批处理文件，则可以使用章命令这样做。

File types are registered in HKCR\ (full documentation available from MSDN). You can find out if a type is registered by checking for the existence of the key. In a batch file, you could use the reg command to do so.

reg query HKCR\.txt || echo This will never print
reg query HKCR\.foobartxt || echo Could not find foobartxt

话虽这么说，文件类型可以被定义和命名，而无需一个默认的处理程序。此外，那些有默认的处理程序可能没有命令行 - 该文件可以通过DDE或COM推出

That being said, file types can be defined and named without having a default handler. Further, those which have default handlers may not have command lines - the file may be launched via DDE or COM.

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