Powershell Convert String With ENV Variable

问题

I have the following code:

$myVar = 'C:\Users\$env:USERNAME\Desktop'
Test-Path "$myVar"

The variable $myVar is needed with single quotes to display the actual variables used to the user. How can I then actually process the variable later into the actual path to use?

Test-Path $myVar returns False, not seeing the users path "C:\Users\User\Desktop"

回答1:

Found it! As the single quotes could not be changed in the original variable $myVar, the following worked to expand its variable later:

$ExecutionContext.InvokeCommand.ExpandString($myVar)

回答2:

You should use this:

$myvar = "C:\Users\$($env:username)\Desktop"
Test-Path "$myvar"

回答3:

$myVar = "C:\Users\"+$env:USERNAME+"\Desktop"
Test-Path $myVar

来源：https://stackoverflow.com/questions/59480435/powershell-convert-string-with-env-variable