Passing empty arguments to executables using powershell

Question

Powershell seems to drop empty string arguments when passed to a command. I have this code

PS D:\\> $b.name = \"foo bar\"
PS D:\\> ./echoargs $b.name
A         


        

Answer 1

This should also work:

./echoargs [String]::Empty

Answer 2

If you want an empty string to appear try escaped quotes around the argument like so:

PS> $b = [psobject]@{name = ''}
PS> echoargs `"$($b.Name)`"
Arg 0 is <>

Command line:
"C:\Users\Keith\Pscx\Trunk\Src\Pscx\bin\Release\Apps\EchoArgs.exe"  ""

Note that I tested this on V3 so I'm not sure if the behavior will be exactly the same on V2.

Answer 3

Try to pass an empty single quote string enclosed in double quotes, or vice versa.

./echoargs $b.name, "''"

or

./echoargs $b.name, '""'