不，cd / && tree && echo %time%。回显的时间是第一个命令执行时的时间。

管道有一些问题，但这并不重要，只要人们知道它是如何工作的。

当您尝试在一行中使用或操作变量时，请注意它们的内容!例如，如下所示的变量

PATH=C:\程序文件(x86)\某处;“C: \企业\酷工具”;% USERPROFILE % \ AppData \当地\ \ WindowsApps微软;

可能会导致很多无法处理的麻烦，如果你使用它作为%PATH%

右括号终止组语句 双引号不允许使用%PATH%来处理圆括号问题 像%USERPROFILE%这样的引用变量将包含什么?

So, I was trying to enable the specific task of running RegAsm (register assembly) from a context menu. The issue I had was that the result would flash up and go away before I could read it. So I tried piping to Pause, which does not work when the command fails (as mentioned here Pause command not working in .bat script and here Batch file command PAUSE does not work). So I tried cmd /k but that leaves the window open for more commands (I just want to read the result). So I added a pause followed by exit to the chain, resulting in the following:

cmd /k C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe "%1" /codebase \"%1\" &暂停&退出

这就像一个咒语——RegAsm在文件上运行并显示其结果，然后显示“按任意键继续…”提示符，然后当按下一个键时命令提示符窗口关闭。

P.S.对于其他可能感兴趣的人，你可以使用以下.reg文件条目来添加一个dllfile关联到.dll文件，然后再添加一个RegAsm命令扩展名(注意转义的引号和反斜杠):

[HKEY_CLASSES_ROOT\.dll]
"Content Type"="application/x-msdownload"
@="dllfile"

[HKEY_CLASSES_ROOT\dllfile]
@="Application Extension"

[HKEY_CLASSES_ROOT\dllfile\Shell\RegAsm]
@="Register Assembly"

[HKEY_CLASSES_ROOT\dllfile\Shell\RegAsm\command]
@="cmd /k C:\\Windows\\Microsoft.NET\\Framework\\v4.0.30319\\regasm.exe \"%1\" /codebase \"%1\" & pause & exit"

现在我有了一个很好的右击菜单来注册程序集。

再举一个例子:例如，当我们使用gulp构建系统时，而不是

Gulp -默认>构建

Gulp构建-构建构建文件夹

Gulp watch -开始文件监视

Gulp dist- build dist-folder

我们可以用一行代码来实现:

cd c:\xampp\htdocs\project & gulp & gulp watch

不，cd / && tree && echo %time%。回显的时间是第一个命令执行时的时间。

管道有一些问题，但这并不重要，只要人们知道它是如何工作的。

文档中的一段话:

来源:微软，Windows XP专业产品文档，命令shell概述 另外:Windows CMD命令的A-Z索引

Using multiple commands and conditional processing symbols You can run multiple commands from a single command line or script using conditional processing symbols. When you run multiple commands with conditional processing symbols, the commands to the right of the conditional processing symbol act based upon the results of the command to the left of the conditional processing symbol. For example, you might want to run a command only if the previous command fails. Or, you might want to run a command only if the previous command is successful. You can use the special characters listed in the following table to pass multiple commands. & [...] command1 & command2 Use to separate multiple commands on one command line. Cmd.exe runs the first command, and then the second command. && [...] command1 && command2 Use to run the command following && only if the command preceding the symbol is successful. Cmd.exe runs the first command, and then runs the second command only if the first command completed successfully. || [...] command1 || command2 Use to run the command following || only if the command preceding || fails. Cmd.exe runs the first command, and then runs the second command only if the first command did not complete successfully (receives an error code greater than zero). ( ) [...] (command1 & command2) Use to group or nest multiple commands. ; or , command1 parameter1;parameter2 Use to separate command parameters.