How to get status of “Invoke-Expression”, successful or failed?

Question

Invoke-Expression will return all the text of the command being invoked.

But how can I get the system return value of whether this command has been exec

Answer 1

In PowerShell you can evaluate execution status by inspecting the automatic variables

$?
   Contains True if last operation succeeded and False otherwise.

and/or

$LASTEXITCODE
   Contains the exit code of the last Win32 executable execution.

The former is for PowerShell cmdlets, the latter for external commands (like %errorlevel% in batch scripts).

Does this help you?