异常通常是终止错误。 引发的异常要么被捕获要么会终止当前执行程序。 默认情况下,Write-Error 会生成一个非终止错误,并将错误添加到输出流,而不引发异常。我指出这一点,是因为 Write-Error 和其他非终止错误不会触发 catch。忽略异常在这种情况下,捕获错误只是为了抑制它。 这样做时要谨慎,因为它会使故障排除变得...
try { NonsenseString } catch { "An error occurred." } catch 关键字必须紧跟 try 块或其他 catch 块。PowerShell 不会将“NonsenseString”识别为 cmdlet 或其他项。运行此脚本会产生以下结果:Output 复制 An error occurred. 当脚本遇到“NonsenseString”时,会导致终止错误。 catch 块通过在块内运行语句列...
catch (Exception e) {if((eisWin32Exception) || (eisSystemException) || (eisInvalidOperationException)) {// This process could not be stopped so write// a non-terminating error.stringmessage = String.Format("{0} {1} {2}","Could not stop process \"", processName,"\"."); Write...
10 | ForEach-Object -Parallel { "Output: $_" Start-Sleep 1 } -ThrottleLimit 2 -AsJob PS> $job Id Name PSJobTypeName State HasMoreData Location Command -- --- --- --- --- --- --- 23 Job23 PSTaskJob Running True PowerShell … PS> $job.ChildJobs Id Name PSJobTypeName Stat...
使用 Windows PowerShell 遠端處理時,建立永久性工作階段並非必要,但是如果您沒有建立永久性連線,每當您呼叫含有 SharePoint Cmdlet 的遠端命令時,每個 Invoke-Command 也都需要包含 PSSnapin Cmdlet。第三個命令 Invoke-Command PSSnapin 可讓您在遠端伺服器上執行 SharePoint PowerShell Cmdlet。 永久性工作階段的參照...
您可以通过您的桌面在同一服务器或不同服务器上,使用 Windows PowerShell Invoke-Command cmdlet 与多个会话通信。利用该 cmdlet,您可以同时启动随后并行运行的多个管理任务。不过,如果这些任务长时间运行,则在远程计算机上的命令运行完之前,您不能重新控制它。这称为以交互方式运行命令。若要以后台作业的形式异步运行,...
PS> $error.Clear() PS> cmd /c whamo! 2>$() PS> $error.Count 2 PS> $error[0] operable program or batch file. PS> $error[1] cmd : 'whamo!' is not recognized as an internal or external command, At line:1 char:1 + cmd /c whamo! 2>$() + ~~~ + CategoryInfo : NotSpe...
is An Introduction to Error Handling in PowerShell. We will discuss error types, the $error variable, error action preferences, try/catch blocks, and $lastexitcode. The first requirement is to understand the types of errors that can occur during execution. Terminating vs. Non-Terminating Errors...
The output from this command will have an almost overwhelming amount of output. Within this mountain of data will be just a handful of high-numbered ephemeral ports on which the server is listening. You are looking for any lines that have“ip_tcp”in them and the ports are ...
ClickNew client secretand then for Expires selectNever. \n ClickAdd. \n Copy and save locally the value of the secret that appears- you won’t see it again after you leave this part of the UI. \n