#100: How to execute a string in Powershell?

 Rarely, but sometimes we need to run the command from an expression that we create. I stumbled upon a situation where I was to read the content of a config file and run it. 

There could be other ways to do it, but invoke-expression can be used with simplicity. 

Invoke-Command

SYNTAX

    Invoke-Command [-ScriptBlock] <scriptblock> [-NoNewScope] [-InputObject <psobject>] [-ArgumentList <Object[]>]

    [<CommonParameters>]

EXAMPLE: 

Read content of a file that has EXPRESSION=get-help ls 

$str=gc "c:\temp\cmd_list.txt" | where { $_ -match "EXPRESSION=" } | foreach { $_.split("=")[1] 

invoke-command $str

      

      

I hope it was quite easy and simple. 

Happy scripting !!!