>我有一个脚本，可以从本地或远程计算机备份用户配置文件并将其放置在共享上：$Global:Shared_BackupPath = "\servershare"。我一直在对其进行更多调整，最终将一些变量转换为全局变量(不确定这是否是问题所在 -不明白为什么会这样)。
这是条件：
if(-not (Get-EventSubscriber)){
我尝试将其更改为-eq $null以查看它是否会有任何不同，但没有。
它只是没有正确分析条件，并在所有作业完成之前继续显示我的消息框：它">应该"等到没有更多事件，然后显示消息框：
Register-ObjectEvent -InputObject $job -EventName StateChanged -Action {
#Start-Sleep -Milliseconds 500
$eventSubscriber | Unregister-Event
$eventSubscriber.Action | Remove-Job
if(-not (Get-EventSubscriber)){
$Profile_Sum = Get-ChildItem -Path $Global:BackUp_Path -Recurse |
Measure-Object -Property length -Sum |
Select-Object -ExpandProperty Sum
$Size = try{if($Profile_Sum -lt 1048576){ $TinyByte = " {0:N2}" -f ($Profile_Sum / 1KB) + " KB"; $TinyByte }
elseif($Profile_Sum -gt 1048576 -and $Profile_Sum -lt 1073741824){ $MediumByte = " {0:N2}" -f ($Profile_Sum / 1MB) + " MB"; $MediumByte }
elseif($Profile_Sum -gt 1073741824){ $GiganticByte = " {0:N2}" -f ($Profile_Sum / 1GB) + " GB"; $GiganticByte } } Catch {}
$Begin_Time = Get-Item -Path $Global:BackUp_Path | Select-Object -ExpandProperty LastWriteTime
$End_Time = Get-Date -Format G
Get-Job | Remove-Job
[System.Windows.MessageBox]::Show("Copying Complete!`nStart Time: $Begin_Time `nEnd Time: $End_Time `nProfile Size copied: $Size")
}
} | Out-Null
}
我觉得由于事件本身被注册为作业，我可能有一个想法，但不太确定如何去做，让它等到它完成所有作业，然后再显示消息框通知我复制完成。除此之外，脚本运行良好，任何阅读本文的人都可以随意使用它。以下是完整的脚本：
Function PFL-UserBackUp{
[cmdletbinding()]
Param(
[Parameter(Mandatory=$false,
ValueFromPipeLine=$true,
ValueFromPipeLineByPropertyName=$true)]
[Alias('CN','Computer','server','node')]
[ValidateLength(1, 15)]
[String[]]$ComputerName = $env:COMPUTERNAME )
Begin{
$Global:Shared_BackupPath = "\servershare"
}
Process{
Foreach($Computer in $ComputerName){
Try{
$PSSession = New-PSSession -ComputerName $Computer -ErrorAction Stop
[array]$User_List = Invoke-Command -ScriptBlock {
Get-ChildItem -Path "C:Users" -Exclude Public, Default* |
Sort-Object -Property LastWriteTime -Descending } -Session $PSSession
$userinfo1 = foreach ($user in $User_List.name) {
$userinfo = (net user $user /domain | Select-String "Full Name" -ErrorAction SilentlyContinue) -replace "Full Name ", "" 2>&1 | Out-String -Stream
if ($userinfo.Length -lt 4) { "NO DISPLAY NAME in ADUC" }
elseif($LASTEXITCODE -eq 2) { "ACCOUNT NOT in ADUC" }
elseif($LASTEXITCODE -eq 0) { $userinfo }
else { "Error occured" }
}
$(for($i=0; $i -lt $User_List.Count; $i++){
[pscustomobject]@{
'User Display Name ' = "$($i): $($userinfo1[$i])"
' NAME ' = $User_List.name[$i]
'Last Modified' = "$($User_List.LastWriteTime[$i])"
'Profile Size ' = Try{
$ProfilePath = $User_List.FullName[$i]
$Profile_Sum = Invoke-Command -ScriptBlock {
Get-ChildItem -Path $Using:ProfilePath -Recurse |
Where-Object {$_.PSParentPath -match "Documents|Desktop|Music|Videos|Downloads|Links|Pictures|Favorites|Contacts" -and $_.DirectoryName -notmatch "OneDrive" } |
Measure-Object -Property length -Sum |
Select-Object -ExpandProperty Sum } -Session $PSSession
if($Profile_Sum -lt 1048576){ $TinyByte = " {0:N2}" -f ($Profile_Sum / 1KB) + " KB"; $TinyByte }
elseif($Profile_Sum -gt 1048576 -and $Profile_Sum -lt 1073741824){ $MediumByte = " {0:N2}" -f ($Profile_Sum / 1MB) + " MB"; $MediumByte }
elseif($Profile_Sum -gt 1073741824){ $GiganticByte = " {0:N2}" -f ($Profile_Sum / 1GB) + " GB"; $GiganticByte } #Profile Size
} Catch { "$($Error[0].Exception.Message.Split('.')[2].Trim())!" }
}
} ) | Out-Host
Write-Host "Press 'Q' to quit."
$ii = Read-Host -Prompt "Enter Number of Profile to Back-Up"
$i = $ii.Trim() -split ","
if([String]::IsNullOrEmpty($i) -eq $true) { "Null string"; Break }
elseif($i.ToLower() -like "q*") {"Q was selected. Stopping script."; Break }
<#
" "
" Following Profiles will be Saved:"
" ------------------------------------"
foreach($i in $index) { "$($i.trim()): $($userinfo1[$i])" }
" "
$Confirm = Read-Host -Prompt "Are you sure you want to continue? [Y/N]"
if($Confirm.ToLower().TrimStart() -like "n*" -or $Confirm.ToLower() -like "q*"){Break}
if([String]::IsNullOrEmpty($Confirm.Trim()) -eq $true) { "Null string"; Break }#>
$Profile_Path = "C:Users$($User_List.name[$i])"
$Literal_Name = $userinfo1[$i].Replace('/','-')
$Global:BackUp_Path = "$Global:Shared_BackupPath$Literal_Name"
$Test_Path = Test-Path -Path $Global:BackUp_Path
if($Test_Path -eq $false){
New-Item -Path $Global:BackUp_Path -ItemType Directory | Out-Null
Start-Process $Global:BackUp_Path}
elseif($Test_Path -eq $true){
$Find_OldName = Get-ChildItem -Path "$Global:Shared_BackupPath" -Filter "$Literal_Name" -Directory |
Sort-Object -Property LastWriteTime -Descending |
Select-Object -ExpandProperty BaseName -First 1
$New_PathName = $Find_OldName + "1"
New-Item -Path "$Global:Shared_BackupPath" -Name $New_PathName -ItemType Directory -OutVariable Global:BackUp_Path | Out-Null #Global:BackUp_Path variable declared
$Global:BackUp_Path = $Global:BackUp_Path.FullName
Start-Process $Global:BackUp_Path}
$Global:Start_Time = Get-Date -Format G
#Favorites Copy
$FireFox_Favorites = "C:Users$($User_List.name[$i])AppDataRoamingMozillaFirefoxProfiles*.defaultplaces.sqlite"
$Chrome_Favorites = "C:Users$($User_List.name[$i])AppDataLocalGoogleChromeUser DataDefaultBookmarks"
$Chrome_Favorites2 = "C:Users$($User_List.name[$i])AppDataLocalGoogleChromeUser DataDefaultBookmarks.bak"
$Sticky_Notes = "C:Users$($User_List.name[$i])AppDataLocalPackagesMicrosoft.MicrosoftStickyNotes_8wekyb3d8bbweLocalStateplum.sqlite"
$Favorites_Array = @($FireFox_Favorites,$Chrome_Favorites,$Chrome_Favorites2,$Sticky_Notes)
Foreach($File in $Favorites_Array){
$Test_File = Invoke-Command -ScriptBlock { Test-Path -Path $File }
if($Test_File -eq $true){
Copy-Item -Path $File -Destination $Global:BackUp_Path -Force -Recurse -FromSession $PSSession
}
}
#Folders Copy
$Folders = @('Desktop','Documents','Favorites','Links','Downloads','Music','Videos','Pictures','Contacts')
Foreach($Folder in $Folders){
#Create Arugments for seperate thread
$ArgumentsArray = $null
$ArgumentsArray = @()
$ArgumentsArray += "\$Computerc$Users$($User_List.name[$i])$Folder"
$ArgumentsArray += $Global:BackUp_Path
$job = Start-Job -ScriptBlock { Copy-Item -Path $args[0] -Destination $args[1] -Force -Recurse } -Name $Folder -ArgumentList $ArgumentsArray
Register-ObjectEvent -InputObject $job -EventName StateChanged -Action {
#Start-Sleep -Milliseconds 500
$eventSubscriber | Unregister-Event
$eventSubscriber.Action | Remove-Job
if(-not (Get-EventSubscriber)){
$Profile_Sum = Get-ChildItem -Path $Global:BackUp_Path -Recurse |
Measure-Object -Property length -Sum |
Select-Object -ExpandProperty Sum
$Size = try{if($Profile_Sum -lt 1048576){ $TinyByte = " {0:N2}" -f ($Profile_Sum / 1KB) + " KB"; $TinyByte }
elseif($Profile_Sum -gt 1048576 -and $Profile_Sum -lt 1073741824){ $MediumByte = " {0:N2}" -f ($Profile_Sum / 1MB) + " MB"; $MediumByte }
elseif($Profile_Sum -gt 1073741824){ $GiganticByte = " {0:N2}" -f ($Profile_Sum / 1GB) + " GB"; $GiganticByte } } Catch {}
$Begin_Time = Get-Item -Path $Global:BackUp_Path | Select-Object -ExpandProperty LastWriteTime
$End_Time = Get-Date -Format G
Get-Job | Remove-Job
[System.Windows.MessageBox]::Show("Copying Complete!`nStart Time: $Begin_Time `nEnd Time: $End_Time `nProfile Size copied: $Size")
}
} | Out-Null
}
" "
Write-Output -InputObject "Copying will be done in background."
Write-Output -InputObject "You will be notified when copying is done."
} catch [System.Management.Automation.Remoting.PSRemotingTransportException]{
"Unable to connect to PC: $Computer `nError: $($Error[0].Exception.Message.Split('.')[2].Trim())!"
}
}
}
}
我删除了一些可能给我带来麻烦的信息，但这都是化妆品。
编辑：我必须在破解，但现在一切都在工作。我所做的唯一更改是在为其赋值之前清除全局变量($Global:var = $null)。谢谢大家的建议。我所做的另一个更改是将Copy-Item更改为Robocopy。
回答您的问题：
为什么我的 if 语句没有被正确读取？
就在您评估Get-EventSubscriber取消事件订阅并因此删除事件订阅者之前。 因此Get-EventSubscriber返回$null当取反时计算结果为$true。总之，if语句后面的代码将始终立即执行。
注释代码：
Register-ObjectEvent -InputObject $job -EventName StateChanged -Action {
$eventSubscriber | Unregister-Event # Here you cancel your event subscription
$eventSubscriber.Action | Remove-Job
if (-not (Get-EventSubscriber)) { # Therefore, Get-EventSubscriber returns $null; not $null evaluates to $true
...
Unregister-Event文档中的相关部分：
Unregister-Eventcmdlet 取消使用Register-EngineEvent、Register-ObjectEvent或Register-WmiEventcmdlet 创建的事件订阅。取消事件订阅后，将从会话中删除事件订阅者，并且订阅的事件不再添加到事件队列中。取消对使用
New-Eventcmdlet 创建的事件的订阅时，新事件也会从会话中删除。