Powershell 异步

Question

我正在使用 powershell 和 wpf 构建一个 GUI。我想在工具运行时更改按钮的内容。但当其他命令完成后它就发生了变化。我尝试将命令作为作业启动，因为我读到 powershell 是同步工作的。即使更改内容的命令位于第一个位置

遵循我的代码：

try {
        $btnCreateUser1.Content = "Bitte warten..."
        $oldinformationJob = Invoke-Command -AsJob -ComputerName test -Credential $cred -ScriptBlock {Get-Aduser -identity $using:ReferenceUserTextBox.Text -Properties * -Credential $Using:cred}
        $oldinformation = Wait-Job $oldinformationJob | Receive-Job
        $Passwort = 'test'
        $Attributes = @{
            SAMAccountname = $NewUserUsernameTextBox.Text
            UserPrincipalName = "$($NewUserUsernameTextBox.Text)@test.de"
            Name = "$($FirstNameTextBox.Text) $($LastNameTextBox.Text)"
            AccountPassword = (ConvertTo-SecureString $Passwort -AsPlainText -Force)
            Path = ($oldinformation.DistinguishedName).Split(",",2)[1]
            GivenName = $FirstNameTextBox.Text
            Surname = $LastNameTextBox.text
            Enabled =$true
            DisplayName = "$($LastNameTextBox.Text), $($FirstNameTextBox.Text)"
            City = ""
            PostalCode = ""
            Country = ""
            State = ""
            Company = $oldinformation.company
            StreetAddress = $oldinformation.StreetAddress
            OfficePhone = $NummerTextBox.text
            Department = $oldinformation.Department
            Office = $RaumTextBox.Text
            Title = $PositionBox.Text
            HomeDirectory = "\\test\user\Home\$($NewUserUsernameTextBox.Text)"
            Homedrive = "U"
        }
        
        Invoke-Command -AsJob -ComputerName test -Credential $cred -ScriptBlock {
            New-ADUser @Using:Attributes -Credential $Using:cred
        }
        Start-Sleep -Seconds 5
        Invoke-Command -AsJob -ComputerName test -Credential $cred -ScriptBlock {Get-ADPrincipalGroupMembership -Identity $($Using:oldinformation.SAMAccountname) -ResourceContextServer "test" -Credential $Using:cred | ForEach-Object {Add-ADGroupmember -Identity $_.SAMAccountname  -Members $($Using:Attributes.SAMAccountname) -Credential $Using:cred -ErrorAction SilentlyContinue}} 
        [System.Windows.Forms.MessageBox]::Show("Der User $($NewUserUsernameTextBox.Text) wurde erstellt ","Active Directory Tool",0)
        $btnCreateUser1.Content = "Benutzer erstellen"
    

Answer 1

请参阅：在 Powershell 中使用调度程序调用和运行空间

WPF 控件（如脚本中的按钮）只能从 UI 线程进行更新。如果您尝试从不同的线程（例如作业线程）更新控件，则需要使用

Dispatcher.Invoke

方法来编组对 UI 线程的调用。

$btnCreateUser1.Dispatcher.Invoke({
    $btnCreateUser1.Content = "Bitte warten..."
}, [System.Windows.Threading.DispatcherPriority]::Background)