如何在启动powershell.exe之前设置首选项`$ ErrorView =“ CategoryView”`

Question

How to set preference $ErrorView = "CategoryView" before start powershell.exe ?

powershell.exe -command "$ErrorView = "CategoryView" ; dir wrong.txt" doesnt work.

Answer 1

your code has a serious error in it. you used 4 double quotes instead of two on the outside and a pair of single quotes on the inside. [ grin ]

this works ...

powershell.exe -command  "$ErrorView = 'CategoryView' ; dir wrong.txt; pause"

remove the pause when you are certain things are working as needed. [ grin ]

Answer 2

To complement Lee Dailey's helpful answer : As Lee points out, your primary problem is that you neglected to escape the " chars. embedded in your overall "..." command .

Assuming that you're calling your command from outside of PowerShell , such as from cmd.exe (Command Prompt):

• Using embedded single -quoting ( '...' ) in lieu of the embedded "..." is an option in this case , as shown in Lee's answer, because CategoryView is to be treated as a literal string .
  Using ' for the embedded quoting conveniently obviates the need for escaping.

• However, in cases where the embedded string contains variable references (eg, $var ) or expressions (eg, $(Get-Date) ), use of a double-quoted string ( "..." ) is a must , because only double-quoted strings are expandable (interpolated). Escaping the embedded " as \\" is then a must .

  • Note that, by contrast, inside PowerShell " chars. must be escaped as `" .

# From cmd.exe, for instance.
C:\>powershell.exe -command  "$ErrorView = \"CategoryView\"; dir wrong.txt" 

---

If, for some reason, you must invoke another PowerShell instance from within PowerShell, use a script block ( { ... } ), which also obviates the need for escaping (and better integrates with the calling session by returning objects from the invocation, not just strings ).

# From Powershell.
PS> powershell.exe -command { $ErrorView = "CategoryView" ; dir wrong.txt }