[environment]::Version

为当前PSH副本正在使用的CLR提供一个Version实例(如本文所述)。

好的解决方案

尝试使用可下载的DotNetVersionLister模块(基于注册表信息和一些版本到营销版本查找表)。

可以这样使用:

PS> Get-DotNetVersion -LocalHost -nosummary


ComputerName : localhost
>=4.x        : 4.5.2
v4\Client    : Installed
v4\Full      : Installed
v3.5         : Installed
v3.0         : Installed
v2.0.50727   : Installed
v1.1.4322    : Not installed (no key)
Ping         : True
Error        :

或者如果你只是想测试一些。net框架>= 4.*:

PS> (Get-DotNetVersion -LocalHost -nosummary).">=4.x"
4.5.2

但它将无法工作(安装/导入)，例如与PS v2.0 (Win 7, Win Server 2010标准)由于不兼容…

“遗产”的动机功能如下

(你可以跳过阅读下面的代码)

We had to work with PS 2.0 on some machines and could not install/import the above DotNetVersionLister. On other machines we wanted to update (from PS 2.0) to PS 5.1 (which in turn needs .NET Framework >= 4.5) with the help of two company-custom Install-DotnetLatestCompany and Install-PSLatestCompany. To guide admins nicely through the install/update process we would have to determine the .NET version in these functions on all machines and PS versions existing. Thus we used also the below functions to determine them more safely in all environments...

用于遗留PS环境的函数(例如PS v2.0)

所以下面的代码和下面(提取的)使用示例在这里是有用的(基于这里的其他答案):

function Get-DotNetVersionByFs {
  <#
    .SYNOPSIS
      NOT RECOMMENDED - try using instead:
        Get-DotNetVersion 
          from DotNetVersionLister module (https://github.com/EliteLoser/DotNetVersionLister), 
          but it is not usable/importable in PowerShell 2.0 
        Get-DotNetVersionByReg
          reg(istry) based: (available herin as well) but it may return some wrong version or may not work reliably for versions > 4.5 
          (works in PSv2.0)
      Get-DotNetVersionByFs (this):  
        f(ile) s(ystem) based: determines the latest installed .NET version based on $Env:windir\Microsoft.NET\Framework content
        this is unreliable, e.g. if 4.0* is already installed some 4.5 update will overwrite content there without
        renaming the folder
        (works in PSv2.0)
    .EXAMPLE
      PS> Get-DotnetVersionByFs
      4.0.30319
    .EXAMPLE
      PS> Get-DotnetVersionByFs -All
      1.0.3705
      1.1.4322
      2.0.50727
      3.0
      3.5
      4.0.30319
    .NOTES
      from https://stackoverflow.com/a/52078523/1915920
  #>
    [cmdletbinding()]
  param(
    [Switch]$All  ## do not return only latest, but all installed
  )
  $list = ls $Env:windir\Microsoft.NET\Framework |
    ?{ $_.PSIsContainer -and $_.Name -match '^v\d.[\d\.]+' } |
    %{ $_.Name.TrimStart('v') }
  if ($All) { $list } else { $list | select -last 1 }
}


function Get-DotNetVersionByReg {
  <#
    .SYNOPSIS
      NOT RECOMMENDED - try using instead:
        Get-DotNetVersion
          From DotNetVersionLister module (https://github.com/EliteLoser/DotNetVersionLister), 
          but it is not usable/importable in PowerShell 2.0. 
          Determines the latest installed .NET version based on registry infos under 'HKLM:\SOFTWARE\Microsoft\NET Framework Setup\NDP'
    .EXAMPLE
        PS> Get-DotnetVersionByReg
        4.5.51209
    .EXAMPLE
        PS> Get-DotnetVersionByReg -AllDetailed
        PSChildName                                          Version                                             Release
        -----------                                          -------                                             -------
        v2.0.50727                                           2.0.50727.5420
        v3.0                                                 3.0.30729.5420
        Windows Communication Foundation                     3.0.4506.5420
        Windows Presentation Foundation                      3.0.6920.5011
        v3.5                                                 3.5.30729.5420
        Client                                               4.0.0.0
        Client                                               4.5.51209                                           379893
        Full                                                 4.5.51209                                           379893
    .NOTES
      from https://stackoverflow.com/a/52078523/1915920
  #>
    [cmdletbinding()]
    param(
        [Switch]$AllDetailed  ## do not return only latest, but all installed with more details
    )
    $Lookup = @{
        378389 = [version]'4.5'
        378675 = [version]'4.5.1'
        378758 = [version]'4.5.1'
        379893 = [version]'4.5.2'
        393295 = [version]'4.6'
        393297 = [version]'4.6'
        394254 = [version]'4.6.1'
        394271 = [version]'4.6.1'
        394802 = [version]'4.6.2'
        394806 = [version]'4.6.2'
        460798 = [version]'4.7'
        460805 = [version]'4.7'
        461308 = [version]'4.7.1'
        461310 = [version]'4.7.1'
        461808 = [version]'4.7.2'
        461814 = [version]'4.7.2'
    }
    $list = Get-ChildItem 'HKLM:\SOFTWARE\Microsoft\NET Framework Setup\NDP' -Recurse |
        Get-ItemProperty -name Version, Release -EA 0 |
        # For One True framework (latest .NET 4x), change match to PSChildName -eq "Full":
        Where-Object { $_.PSChildName -match '^(?!S)\p{L}'} |
        Select-Object `
           @{
               name = ".NET Framework" ; 
               expression = {$_.PSChildName}}, 
           @{  name = "Product" ; 
               expression = {$Lookup[$_.Release]}}, 
           Version, Release
    if ($AllDetailed) { $list | sort version } else { $list | sort version | select -last 1 | %{ $_.version } }
}

使用示例:

PS> Get-DotNetVersionByFs
4.0.30319

PS> Get-DotNetVersionByFs -All
1.0.3705
1.1.4322
2.0.50727
3.0
3.5
4.0.30319

PS> Get-DotNetVersionByReg
4.5.51209

PS> Get-DotNetVersionByReg -AllDetailed

.NET Framework                   Product Version        Release
--------------                   ------- -------        -------
v2.0.50727                               2.0.50727.5420
v3.0                                     3.0.30729.5420
Windows Communication Foundation         3.0.4506.5420
Windows Presentation Foundation          3.0.6920.5011
v3.5                                     3.5.30729.5420
Client                                   4.0.0.0
Client                           4.5.2   4.5.51209      379893
Full                             4.5.2   4.5.51209      379893

这是上一篇文章的衍生版本，但是在我的测试中得到了。net框架4的最新版本。

get-itemproperty -name version,release "hklm:\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\FULL"

这将允许你调用命令到远程机器:

invoke-command -computername server01 -scriptblock {get-itemproperty -name version,release "hklm:\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\FULL" | select pscomputername,version,release} 

它通过ADModule和命名约定前缀设置了这种可能性:

get-adcomputer -Filter 'name -like "*prefix*"' | % {invoke-command -computername $_.name -scriptblock {get-itemproperty -name version,release "hklm:\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\FULL" | select pscomputername,version,release}} | ft

没有可靠的方法可以使用一个简单的脚本为所有平台和体系结构做到这一点。如果你想学习如何可靠地完成它，请从博客文章更新的。net框架检测代码样本开始，它可以进行更深入的检查。

正确的语法:

[System.Runtime.InteropServices.RuntimeEnvironment]::GetSystemVersion()
#or
$PSVersionTable.CLRVersion

GetSystemVersion函数返回一个像这样的字符串:

v2.0.50727        #PowerShell v2.0 in Win 7 SP1

或者像这样

v4.0.30319        #PowerShell v3.0 (Windows Management Framework 3.0) in Win 7 SP1

$PSVersionTable是一个只读对象。CLRVersion属性是一个结构化的版本号，如下所示:

Major  Minor  Build  Revision
-----  -----  -----  --------
4      0      30319  18444   

我想在PowerShell中试试这个: 为我工作!

(Get-ItemProperty "HKLM:Software\Microsoft\NET Framework Setup\NDP\v4\Full")。版本