PowerShell-从System.DateTime到System.ConsoleColor的无效转换

Question

# Get Password Expire Date
$EXPDTE = [datetime]::FromFileTime((Get-ADUser -Identity $USERNAME -Properties "msDS-UserPasswordExpiryTimeComputed")."msDS-UserPasswordExpiryTimeComputed")

# Subtract Expire Date from Today
$DAYSTOEXP = (($EXPDTE)-(Get-Date)).Days

Write-Host "{0}" -f $EXPDTE

Gives me the following error:

Write-Host : Cannot bind parameter 'ForegroundColor'. Cannot convert value "1/14/2018 10:39:12 AM" to type 
"System.ConsoleColor". Error: "Invalid cast from 'System.DateTime' to 'System.ConsoleColor'."
At C:\Users\\Documents\PowerShell\ADPasswordExpire.ps1:14 char:21
+ Write-Host "{0}" -f $EXPDTE
+                     ~~~~~~~
    + CategoryInfo          : InvalidArgument: (:) [Write-Host], ParameterBindingException
    + FullyQualifiedErrorId : CannotConvertArgumentNoMessage,Microsoft.PowerShell.Commands.WriteHostCommand

This only happens when using Write-Host and the -f operator.

If I do:

$EXPDTE

Sunday, January 14, 2018 10:39:12 AM

$EXPDTE.ToString()

1/14/2018 10:39:12 AM

What am I missing here when using -f ?

Answer 1

In your case, -f is short for -ForeGroundColor .

Remove Write-Host , or use a subexpression:

"{0}" -f $EXPDTE

---

Write-Host $("{0}" -f $EXPDTE)

---

Edit

With a [datetime] object, you should specify the date format. Check out this ss64 page . Eg use d for ShortDatePattern or D for LongDatePattern. If you require a different output string, please reply to comment.

"Date to Expiry: {0:d}" -f $EXPDTE
"Days to Expire: {0}"-f $DAYSTOEXP