how to pass variable from PowerShell to batch variable

Question

我批量调用了powershell命令，并想将$ tmpVersion保存到批处理变量“版本”中。

set version = powershell.exe -Command "$tmpVersion = (Get-ItemProperty 'HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\myapp').DisplayVersion;"

Answer 1

You can use a For loop to save the result of a command as a variable:

powershell.exe example:

@Echo Off
Set "RegRoot=HKLM"
Set "RegKey=SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\myapp"
Set "RegVal=DisplayVersion"
Set "Version="
For /F %%A In (
    'PowerShell -NoP -NoL "(GP '%RegRoot%:%RegKey%').%RegVal%" 2^>Nul'
) Do Set "Version=%%A"
If Not Defined Version Exit /B
Echo %Version%
Pause

reg.exe example:

@Echo Off
Set "RegRoot=HKLM"
Set "RegKey=SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\myapp"
Set "RegVal=DisplayVersion"
Set "Version="
For /F "Tokens=2*" %%A In ('Reg Query "%RegRoot%\%RegKey%" /V "%RegVal%" 2^>Nul'
) Do Set "Version=%%B"
If Not Defined Version Exit /B
Echo %Version%
Pause

WMIC.exe example:

@Echo Off
Set "RegRoot=&H80000002"
Set "RegKey=SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\myapp"
Set "RegVal=DisplayVersion"
Set "Version="
For /F Tokens^=2Delims^=^" %%A In ('WMIC Class StdRegProv
     Call GetStringValue hDefKey^="%RegRoot%" sSubKeyName^="%RegKey%"
      sValueName^="%RegVal%" 2^>Nul') Do Set "Version=%%A"
If Not Defined Version Exit /B
Echo %Version%
Pause