检查注册表项，然后在Powershell中递增

Question

i'm trying to check if a reg key exist and then increment a reg key if it does. I confirmed that i can set the registry value if i just put the value in directly. ie putting in the value 3.

$path = "HKLM:\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\SharedDLLs"
$psv = Get-ItemProperty -path $path
$value = $psv."c:\windows\system32\test.dll"

if(!(Test-Path $value))
    {
    Set-ItemProperty -path $path -name $key -Type DWORD -value $value++
    }
Else
    {
    echo "error 1"
    }

Answer 1

$value is a number so Test-Path $value is always going to be false. Which path do you want to check? The file system path c:\\windows\\system32\\test.dll or the registry key path? If it is the registry key path, you know it exists because it you did a Get-ItemProperty on it.

Answer 2

As administrator, Change $dllToCheck with your own value and try this :

$regPath = "HKLM:\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\SharedDLLs"
$dllToCheck = "C:\Program Files (x86)\Hewlett-Packard\Shared\CaslVer.exe"

$exist =  get-itemproperty $regPath -name $dllToCheck -ErrorAction silentlycontinue
if ($exist -ne $null)
{
  $currentValue = $exist.$dllToCheck
  $nextValue = $currentValue + 1
  Set-ItemProperty $regPath -name $dllToCheck -Value $nextValue
}