4

I have a powershell command that runs fine.

$(Get-Item c:\0\01.txt).lastwritetime=$(Get-Date "01/22/2002 11:11 am")

I'd like to use it multiple time. Using a batch file. Before the batch file I used this:

Set-ExecutionPolicy Unrestricted

The batch contains commands like this one:

powershell -Command "$(Get-Item c:\0\01.txt).lastwritetime=$(Get-Date "01/22/2003 11:11 am")"

The batch file fails, I got two error messages per command:

Get-Date : A positional parameter cannot be found that accepts argument '11:11'.
At line:1 char:49
+ $(Get-Item c:\0\01.txt).lastwritetime=$(Get-Date <<<<  01/22/2003 11:11 am)
    + CategoryInfo          : InvalidArgument: (:) [Get-Date], ParameterBindingException
    + FullyQualifiedErrorId : PositionalParameterNotFound,Microsoft.PowerShell.Commands.GetDateCommand

Exception setting "LastWriteTime": "Cannot convert null to type "System.DateTime"."
At line:1 char:25
+ $(Get-Item c:\0\01.txt). <<<< lastwritetime=$(Get-Date 01/22/2003 11:11 am)
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : PropertyAssignmentException

Unfortunately I don't know what is wrong. Can some help me out?

screenshot of powershell window

  • 1
    Replace one set of double "s with single quotes 's – DavidPostill Dec 11 '18 at 23:00
1

You need to either escape the inner double quotes with a backslash (because cmd would see the date time unquoted)

powershell -Command "(Get-Item .\01.txt).lastwritetime=(Get-Date \"01/22/2003 11:11 am\")"

or exchange the inner double with single quotes (as DavidPostill suggested).

powershell -Command "(Get-Item .\01.txt).lastwritetime=(Get-Date '01/22/2003 11:11 am')"

Also the $ are only neccessary when forcing the expression inside a string.

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