如果要使用注册表，则必须递归以获取4.x Framework的完整版本。较早的答案都返回我的系统上.NET 3.0的根号（嵌套在3.0下的WCF和WPF编号更高-我无法解释），而对于4.0则不返回任何内容。 。
编辑：对于.Net 4.5及更高版本，这再次稍有更改，因此现在这里有一篇不错的MSDN文章，解释了如何将Release值转换为.Net版本号，这是总的火车残骸:-(
这对我来说似乎正确（请注意，它在3.0上为WCF和WPF输出单独的版本号。我不知道那是什么）。它还在4.0上输出Client和Full（如果您同时安装了它们）：
Get-ChildItem 'HKLM:\SOFTWARE\Microsoft\NET Framework Setup\NDP' -recurse |
Get-ItemProperty -name Version,Release -EA 0 |
Where { $_.PSChildName -match '^(?!S)\p{L}'} |
Select PSChildName, Version, Release
根据MSDN文章，您可以构建查找表并返回4.5之后的发行的市场营销产品版本号：
$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'
528040 = [version]'4.8'
528049 = [version]'4.8'
}
# For One True framework (latest .NET 4x), change the Where-Object match
# to PSChildName -eq "Full":
Get-ChildItem 'HKLM:\SOFTWARE\Microsoft\NET Framework Setup\NDP' -Recurse |
Get-ItemProperty -name Version, Release -EA 0 |
Where-Object { $_.PSChildName -match '^(?!S)\p{L}'} |
Select-Object @{name = ".NET Framework"; expression = {$_.PSChildName}},
@{name = "Product"; expression = {$Lookup[$_.Release]}},
Version, Release
实际上，由于我必须不断更新此答案，因此这里有一个脚本，用于从该网页的降价来源中生成脚本（上面有一点点）。这可能会在某个时候中断，所以我将当前副本保留在上面。
# Get the text from github
$url = "https://raw.githubusercontent.com/dotnet/docs/master/docs/framework/migration-guide/how-to-determine-which-versions-are-installed.md"
$md = Invoke-WebRequest $url -UseBasicParsing
$OFS = "`n"
# Replace the weird text in the tables, and the padding
# Then trim the | off the front and end of lines
$map = $md -split "`n" -replace " installed [^|]+" -replace "\s+\|" -replace "\|$" |
# Then we can build the table by looking for unique lines that start with ".NET Framework"
Select-String "^.NET" | Select-Object -Unique |
# And flip it so it's key = value
# And convert ".NET FRAMEWORK 4.5.2" to [version]4.5.2
ForEach-Object {
[version]$v, [int]$k = $_ -replace "\.NET Framework " -split "\|"
" $k = [version]'$v'"
}
# And output the whole script
@"
`$Lookup = @{
$map
}
# For extra effect we could get the Windows 10 OS version and build release id:
try {
`$WinRelease, `$WinVer = Get-ItemPropertyValue "HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion" ReleaseId, CurrentMajorVersionNumber, CurrentMinorVersionNumber, CurrentBuildNumber, UBR
`$WindowsVersion = "`$(`$WinVer -join '.') (`$WinRelease)"
} catch {
`$WindowsVersion = [System.Environment]::OSVersion.Version
}
Get-ChildItem 'HKLM:\SOFTWARE\Microsoft\NET Framework Setup\NDP' -Recurse |
Get-ItemProperty -name Version, Release -EA 0 |
# For The 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,
# Some OPTIONAL extra output: PSComputerName and WindowsVersion
# The Computer name, so output from local machines will match remote machines:
@{ name = "PSComputerName"; expression = {`$Env:Computername}},
# The Windows Version (works on Windows 10, at least):
@{ name = "WindowsVersion"; expression = { `$WindowsVersion }}
"@