獲取將上次登錄時間與日期進行比較的錯誤

Question

我編寫了一個腳本，該腳本可以獲取機器上所有用戶的所有登錄信息，並過濾掉超過30天的任何內容。我們希望使用它來更準確地計算我們按用戶費率付費的一些許可證。該腳本還會過濾掉我們與系統和服務帳戶一起使用的管理員帳戶。

這是腳本。

#This script will check which users have logged on in the last X days 
#Set Variables 
#Change the number in the parenthesis after adddays to change how far back to filter 
#example (get-date).adddays(-30) gets all logins for the last 30 days from  today (-60) would be the last 60 days 

$AuditDate = (get-date).adddays(-30) 
$ComputerName = $env:COMPUTERNAME 
$CurrentDate = Get-Date -UFormat "%Y-%m-%d" 

#Delete any previously created files 
Get-ChildItem -Path "C:\PowerShellScripts\LastLogon" -Recurse | 
Where-Object CreationTime -lt (Get-Date).AddDays(-0) | Remove-Item - ErrorAction SilentlyContinue 

#The Login Profile is filtered here 
Get-WmiObject -class Win32_NetworkLoginProfile | 
Where-Object -FilterScript {$_.FullName -notlike "*Agvance*"} | 
Where-Object -FilterScript {$_.FullName -notlike "*Sophos*"} | 
Where-Object -FilterScript {$_.FullName -notlike "*SSI*"} | 
Where-Object -FilterScript {$_.FullName -ne "AgvAdmin"} | 
Where-Object -FilterScript {$_.FullName -ne ""} | 
Where-Object -FilterScript {$_.Name -notlike "*SYSTEM*"} | 
Where-Object -FilterScript {$_.Name -notlike "*SERVICE*"} | 
Where-Object -FilterScript {($_.ConvertToDateTime($_.LastLogon)) -ge $AuditDate} | 
Select-Object Name,@{label='LastLogon';expression={$_.ConvertToDateTime($_.LastLogon)}} | Export-Csv C:\PowerShellScripts\LastLogon.csv -NoTypeInformation 

#The user count is created here 
$number = (Import-Csv C:\PowerShellScripts\LastLogon.csv | measure | % { $_.Count}) 

#The file is renamed to include computername, date, and user count 
rename-item -path C:\PowerShellScripts\LastLogon.csv -NewName 
C:\PowerShellScripts\LastLogon-$ComputerName-$CurrentDate-UserCount-$number.csv 

該腳本按預期工作，但在運行時收到此錯誤。

Exception calling "ConvertToDateTime" with "1" argument(s): "Exception calling "ToDateTime" with "1" argument(s): "Specified 
argument was out of the range of valid values. 
Parameter name: dmtfDate"" 
At C:\Agvance Updates\LastLogon.ps1:22 char:29 
+ Where-Object -FilterScript {$_.ConvertToDateTime($_.LastLogon) -ge $AuditDate} | 
+        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
+ CategoryInfo   : NotSpecified: (:) [], MethodInvocationException 
+ FullyQualifiedErrorId : ScriptMethodRuntimeException 

我試圖比較$ .ConvertToDateTime（$ .LastLogon）和$ AuditDate不同的方式。這種方式可行，但我想擺脫$ .ConvertToDateTime（$ .LastLogon）的錯誤。有沒有更好的方法來獲得這個日期，並比較它的過濾？

Answer 1

LastLogon可能爲空，且ConvertToDateTime()不接受空值。

要排除與LastLogon（如果，例如，輪廓從未登錄到）沒有價值的項目，嘗試：

Get-WmiObject -class Win32_NetworkLoginProfile | 
[...] 
Where-Object -FilterScript {![System.String]::IsNullOrWhiteSpace($_.LastLogon)} | 
Where-Object -FilterScript {($_.ConvertToDateTime($_.LastLogon)) -ge $AuditDate} | 
[...]