如何在脚本完成后防止 Powershell 关闭? [英] How do I prevent Powershell from closing after completion of a script?

问题描述

免责声明:我是 scipting/Powershell 新手的缩影，所以请耐心等待.

Disclaimer : I am the epitome of a scipting/Powershell rookie, so please bear with me.

我编写了一个脚本来返回当前登录到给定工作站的任何用户的 Active Directory 用户名.

I've written a script to return the Active Directory username of any user currently logged into a given workstation.

$input = Read-Host "Workstation Name"
$domain = ".*****.***.com"
$computer = $input + $domain
$list = gwmi win32_computersystem -comp $computer | select Username,Caption
Write-Output $list

但是，如果我从任务栏中的固定脚本运行它，Powershell 窗口会在我有机会查看结果之前关闭.

However, if I run this from a pinned script in the taskbar, the Powershell window closes before I have a chance to view the results.

我尝试了 这篇文章，但无济于事.方法 2 提示用户输入之前结果显示而不是之后，即使在脚本末尾添加提示代码也是如此.

I have tried method 2 and 3 from this post, but to no avail. Method 2 prompts for user input before the results are displayed instead of after, even when the code for the prompt is added at the end of the script.

任何帮助将不胜感激.

推荐答案

链接帖子中的方法 2 - 即，在退出脚本之前等待用户按下一个键 - 可以使用，但需要额外的努力:

Method 2 from the linked post - i.e., waiting for the user to press a key before exiting the script - can be used, but it requires additional effort:

按如下方式结束您的脚本，以便查看 $list before pause 命令提示的值:

End your script as follows in order to see the value of $list before the pause command prompts:

$list | Out-Host  # Force *synchronous* to-display output.
pause             # Wait for the user to press Enter before exiting.

^{注意:PowerShell 中的 pause 只是一个围绕 Read-Host 的函数包装器，如下所示: $null = Read-Host 'Press Enter tocontinue...' 所以，如果你想自定义提示字符串，直接调用Read-Host即可.}

^{Note: pause in PowerShell is simply a function wrapper around Read-Host as follows: $null = Read-Host 'Press Enter to continue...' Therefore, if you want to customize the prompt string, call Read-Host directly.}

这个答案解释了为什么使用Out-Host(或Format-Table) 在这种情况下是必要的；简而言之:

This answer explains why the use of Out-Host (or Format-Table) is necessary in this case; in short:

• 在 PSv5+ 中，隐式应用Format-Table命令异步等待最多 300 毫秒.用于额外的管道输入，以便从输入数据中导出合适的列宽.

• In PSv5+, an implicitly applied Format-Table command asynchronously waits for up to 300 msecs. for additional pipeline input, in an effort to derive suitable column widths from the input data.

• 因为您使用 Write-Output 输出对象而没有预定义的格式化数据，这些数据具有 2 个属性(4 个或更少)，所以会隐式选择表格输出，并且 Format-Table 在幕后异步使用.

• Because you use Write-Output output objects without predefined formatting data that have 2 properties (4 or fewer ), tabular output is implicitly chosen, and Format-Table is used behind the scenes, asynchronously.

注意:异步行为仅适用于其类型格式化指令未预定义的输出对象(如使用 Get-FormatData 报告的那样)代码>);例如，Get-Alias 输出的 System.Management.Automation.AliasInfo 实例的输出格式是预定义的，所以 Get-别名；暂停 确实以预期的顺序产生输出.

Note: The asynchronous behavior applies only to output objects for whose types formatting instructions aren't predefined (as would be reported with Get-FormatData <fullOutputTypeName>); for instance, the output format for the System.Management.Automation.AliasInfo instances output by Get-Alias is predefined, so Get-Alias; pause does produce output in the expected sequence.

pause 命令在等待期结束之前执行，只有在您回答提示后 才会执行表格打印，之后窗口立即关闭.

The pause command executes before that waiting period has elapsed, and only after you've answered the prompt does the table print, after which point the window closes right away.

使用显式格式化命令(Out-Host 在最通用的情况下，但任何 Format-* cmdlet也会这样做)通过同步生成显示输出来避免该问题，以便在 pause 显示其提示时输出将可见.

The use of an explicit formatting command (Out-Host in the most generic case, but any Format-* cmdlet will do too) avoids that problem by producing display output synchronously, so that the output will be visible by the time pause displays its prompt.

这篇关于如何在脚本完成后防止 Powershell 关闭?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！