Question

gc "C:\folder1\folder2\MyService.exe.config"

一切都很好

gwmi win32_service|?{$_.name -match "MyService"} | % {$_.pathname}
"C:\folder1\folder2\MyService.exe.config"

返回正确的路径

gwmi win32_service|?{$_.name -match "Mailing"} | % {$_.pathname} | % {$_.gettype()}

返回类型绝对是一个字符串

gwmi win32_service|?{$_.name -match "Mailing"} | % {$_.pathname} | % {gc -path $_}

gc : Cannot find drive. A drive with the name '"C' does not exist.
At line:1 char:71
+ gwmi win32_service|?{$_.name -match "MyService"} | % {$_.pathname} | % {gc -path $ ...
+                                                                       ~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: ("C:String) [Get-Content], DriveNotFoundException
    + FullyQualifiedErrorId : DriveNotFound,Microsoft.PowerShell.Commands.GetContentCommand

我在这里缺少什么？

Answer 1

仔细查看错误消息：

A drive with the name '"C' does not exist.
                       ^

请注意驱动器号前面的"。

从WMI查询返回的路径在双引号之间，即双引号不是分隔字符串，就像在第一个语句中一样，但是字符串的一部分 ，因此Get-Content失败，因为找不到驱动器"C:。

演示：

PS C:\> $path = "C:\temp\web.config"
PS C:\> $path
C:\temp\web.config
PS C:\> Get-Content $path


...

PS C:\> $path = '"C:\temp\web.config"'
PS C:\> $path
"C:\temp\web.config"
PS C:\> Get-Content $path
Get-Content : Cannot find drive. A drive with the name '"C' does not exist.
At line:1 char:1
+ Get-Content $path
+ ~~~~~~~~
    + CategoryInfo          : ObjectNotFound: ("C:String) [Get-Content], DriveNotFoundException
    + FullyQualifiedErrorId : DriveNotFound,Microsoft.PowerShell.Commands.GetContentCommand

从字符串的开头和结尾删除双引号，问题将消失：

Get-WmiObject Win32_Service |
  ? { $_.Name -match "Mailing" } |
  % { $_.PathName -replace '^"(.*)"$', '$1' } |
  % { Get-Content -Path $_ }

Get-Content无法读取通过WMI检索的路径

1 个答案: