将值转换为相应的文本

Question

我正在尝试让我的脚本完成以检查远程机器上的powershell版本，我现在归结为最后一部分，我从powershell获取了该文件的版本号，但我正在寻找一种方法来转向6.2.1200.XXX到版本3，到目前为止我的脚本是

Foreach ($Computer in $Computers)
{
    Try
    {
        Write-Host "Checking Computer $Computer"
        $path = "\\$Computer\C$\windows\System32\WindowsPowerShell\v1.0\powershell.exe"
        if (test-path $path)
        {
            Write-host "Powershell is installed::"
            [bool](ls $path).VersionInfo
            Write-host " "
            Write-host "Powershell Remoting Enabled::"
            [bool](Test-WSMan -ComputerName $Computer -ErrorAction SilentlyContinue)
        }
        else
        {
            Write-Host "Powershell isn't installed" -ForegroundColor 'Red'
        }
        Write-Host "Finished Checking Computer $Computer"
    }

Answer 1

包含修订版的文件版本可能会随着更新安装而更改，但前3个数字应该有用。您可以转换为[version]，或者您可以使用简单的拆分或替换来摆脱构建。

然后，您可以创建一个哈希表，其中版本号为键，PS版本为值。

$fileVer = [version](Get-Item $path).VersionInfo
$myVer = "{0}.{1}.{2}" -f $fileVer.Major,$fileVer.Minor,$fileVer.Build

$verTable = @{
    '6.3.1200' = 3
    '6.3.9600' = 4
}

$psVer = $verTable[$myVer]

否则，如果您确定PowerShell远程处理实际上已启用，那么另一种方法就是问它：

$prEnabled = [bool](Test-WSMan -ComputerName $Computer -ErrorAction SilentlyContinue)
if ($prEnabled) {
    $psVer = Invoke-Command -ComputerName $computer -ScriptBlock { $PSVersionTable.PSVersion.Major }
}

设置$myVer的替代方法：

字符串替换：

$fileVer = [version](Get-Item $path).VersionInfo
$myVer = "$($fileVer.Major).$($fileVer.Minor).$($fileVer.Build)"

替换（正则表达式）：

$fileVer = (Get-Item $path).VersionInfo
$myVer = $fileVer -replace '\.\d+$',''
# replaces the last dot and any digits with nothing

分割范围：

$fileVer = (Get-Item $path).VersionInfo
$myVer = ($fileVer -split '\.')[0..2]
# splits on a literal dot, then uses a range to get the first 3 elements of the array

使用switch -wildcard（感谢Ansgar Wiechers）：

$fileVer = (Get-Item $path).VersionInfo.ProductVersion
$myVer = switch -Wildcard ($fileVer) {
    '6.3.1200.*' { 3 }
    '6.3.9600.*' { 4 }
}

Answer 2

我结束的代码是

[CmdletBinding()]
Param (
    [Parameter(Mandatory = $true)]
    $ComputerName
)
if (Test-Path $ComputerName)
{
    $Computers = Get-Content $ComputerName
}
Else
{
    $Computers = $ComputerName
}

Foreach ($Computer in $Computers)
{
    Try
    {
        Write-Host "Checking Computer $Computer"
        $path = "\\$Computer\C$\windows\System32\WindowsPowerShell\v1.0\powershell.exe"
        $fileVer = (Get-Item $path).VersionInfo.ProductVersion
        $myVer = switch -Wildcard ($fileVer)
        {
            '6.0.6002.*' { 1 }
            '6.1.7600.*' { 2 }
            '6.2.9200.*' { 3 }
            '6.3.9600.*' { 4 }
        }

        if (test-path $path)
        {
            Write-host "Powershell is installed::"
            [bool](ls $path).VersionInfo
            Write-host " "
            Write-host "Powershell Version installed::"
            Write-host " $myVer "
            Write-host " "
            Write-host "Powershell Remoting Enabled::"
            [bool](Test-WSMan -ComputerName $Computer -ErrorAction SilentlyContinue)
        }
        else
        {
            Write-Host "Powershell isn't installed" -ForegroundColor 'Red'
        }
        Write-Host "Finished Checking Computer $Computer"
    }

    catch { }
}