Executing a command stored in a variable from PowerShell

Question

I have a command that I have build and stored in a variable in PowerShell  This command works if I do a Write-Host and copy and paste into a standard cmd exe window   How do I execute this command from inside my script   I have tried several combination of Invoke-Command or Invoke-Expression with no luck   This is how I built the variable    cmd1    arcprg    arcdir          site1    -     hst    -     yesterday     zip      logpath1    u ex     yesterday     log    This is what the variable looks like if it is printed to the screen   7z exe a -tzip c  arc logs site-host-at-web1-100827 zip c  inetpub logs logfiles w3svc1 u ex100827 log

User · Answer

Try invoking your command with Invoke-Expression   Invoke-Expression  cmd1   Here is a working example on my machine    cmd     amp   C  Program Files 7-zip 7z exe  a -tzip c  temp test zip c  temp test txt  Invoke-Expression  cmd     iex is an alias for Invoke-Expression so you could do   iex  cmd1   For a full list   Visit https   ss64 com ps  for more Powershell stuff   Good Luck

User · Answer

Here is yet another way without Invoke-Expression but with two variables  command string nbsp and nbsp parameters array   It works fine for me  Assume 7z exe is in the system path    cmd    7z exe   prm    a    -tzip    c  temp with space test1 zip    C  TEMP with space changelog    amp   cmd  prm   If the command is known  7z exe  and only parameters are variable then this will do   prm    a    -tzip    c  temp with space test1 zip    C  TEMP with space changelog    amp  7z exe  prm   BTW  Invoke-Expression with one parameter works for me  too  e g  this works   cmd     amp  7z exe a -tzip  c  temp with space test2 zip   C  TEMP with space changelog    Invoke-Expression  cmd   P S  I usually prefer the way with a parameter array because it is easier to compose programmatically than to build an expression for Invoke-Expression

[powershell] Executing a command stored in a variable from PowerShell

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