powershell - Get-Content 无法读取通过 WMI 检索的路径

Question

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

一切都好

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()}

返回类型肯定是字符串

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.                       ^

Note the " in front of the drive letter.

The path returned from the WMI query is between double quotes, i.e. the double quotes are not delimiting the string as in your first statement, but are part of the string, so Get-Content fails, because it can't find a drive "C:.

Demonstration:

PS C:\> $path = "C:\temp\web.config"PS C:\> $pathC:\temp\web.configPS C:\> Get-Content $path<?xml version="1.0" encoding="utf-8" ?><configuration>...</configuration>PS C:\> $path = '"C:\temp\web.config"'PS C:\> $path"C:\temp\web.config"PS C:\> Get-Content $pathGet-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

Remove the double quotes from beginning and end of the string and the problem will disappear:

Get-WmiObject Win32_Service |
    Where-Object { $_.Name -match "Mailing" } |
    ForEach-Object { $_.PathName <b>-replace '^"(.*)"$', '$1'</b> } |
    ForEach-Object { Get-Content -Path $_ }