Powershell命令行参数和' - ' [英] Powershell command line parameters and '--'

问题描述

因为无论什么原因，当我试图调用一个C＃程序，我在写，我试图在命令行中传递两个参数' - '，Powershell不用我的命令行调用该程序。 / p>

例如，我提供命令行：

 。 \abc.exe foo.txt  -  bar  -  
  

当我调用这个时，C＃程序main只获取命令行args：

  foo.txt bar  -  
  

而不是

  foo.txt  -  bar  -  -  
  

。

任何人都知道为什么会发生这种情况。

BTW，如果我把它称为：

 code> .\abc.exe foo.txt' - 'bar' - '
  

<

 <$ c $ 
 c>& .\abc.exe foo.txt  -  bar  -  
  

似乎没有帮助。

我认为这是一个powershell奇怪的原因是，如果我从CMD.EXE运行相同的命令行一切正常工作。

解决方案

双连字符指示PowerShell将后面的所有内容视为文字参数而不是选项，以便可以传递实例 foo 到您的脚本/ application / cmdlet。

示例：

  PS C：\>回声-bar| select-string -bar 
 Select-String：找不到与参数名称bar匹配的参数。 
在行：1个字符：28 
 +-bar| select-string -bar<<<< 
 + CategoryInfo：InvalidArgument：（:) [Select-String]，ParameterBindingException 
 + FullyQualifiedErrorId：NamedParameterNotFound，Microsoft.PowerShell.Commands.SelectStringCommand 
  

vs。

  PS C：\>回声-bar| select-string  -  -bar 
 
 -bar 
  

您必须引用（ - ，' - '）或escape（ ` - ）双连字符。

For whatever reason, when I try to call a C# program I'm writing, and I try to pass two arguments with '--' in the command line, Powershell doesn't call the program with my command line.

For instance, I'm providing the command line:

.\abc.exe foo.txt -- bar --

When I call this, the C# program's main only gets the command line args:

foo.txt bar --

instead of

foo.txt -- bar --

as would be expected.

Anybody know why this would be happening?

BTW, if I call it as:

.\abc.exe foo.txt '--' bar '--'

it works as expected.

Also, calling it as:

& .\abc.exe foo.txt -- bar --

Doesn't seem to help.

My reason for thinking this is a powershell weirdness is that if I run the same command line from CMD.EXE everything works as expected.

解决方案

A double hyphen instructs PowerShell to treat everything coming after as literal arguments rather than options, so that you can pass for instance a literal -foo to your script/application/cmdlet.

Example:

PS C:\> echo "-bar" | select-string -bar
Select-String : A parameter cannot be found that matches parameter name 'bar'.
At line:1 char:28
+ "-bar" | select-string -bar <<<<
    + CategoryInfo          : InvalidArgument: (:) [Select-String], ParameterBindingException
    + FullyQualifiedErrorId : NamedParameterNotFound,Microsoft.PowerShell.Commands.SelectStringCommand

vs.

PS C:\> echo "-bar" | select-string -- -bar

-bar

To avoid this behavior you must either quote ("--", '--') or escape (`--) the double hyphen.

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