PowerShell 帮助文件未正确显示 [英] PowerShell helpfiles not displaying correctly

问题描述

在 Windows 10 和 Windows Server 2012 上的 PowerShell 4.0、5.0 中测试:

Tested in PowerShell 4.0, 5.0 on Windows 10 and Windows Server 2012:

clear
help *-wmiobject*

或

cls
man *-job*

帮助文件在清屏后无法正确显示结果.重新运行命令，它按预期工作.

The help file does not display results correctly after clearing screen. Re-run the command and it works as expected.

Get-Help is unaffected.

这是什么原因?

谢谢

推荐答案

一个有趣的错误.原因(显然)是在 Powershell 显示 help() 调用的结果后更新了搜索帮助"的进度条，有效地清除了第 2 行到第 9 行的 8 行最佳.解决方法是将结果存储在一个临时变量中.

A funny bug. The reason (apparently) is that the progress bar for "Searching for help" is updated after Powershell displays the results of help() call, effectively clearing the 8 rows from row #2 to #9 from the top. The workaround is store the result in a temporary variable.

$temp=help *-wmiobject; $temp

这确保函数在显示内容之前已经退出，因此进度条已经从窗口中移除.

This ensures that the function has exited before displaying stuff, thus the progress bar will already be removed from the window.

更新:如果您在 help 的参数中不包含星号，则该错误不存在.因此，可能会出现这个bug，因为显示是在help()的Process"部分完成的，清除进度条的代码位于函数的End"部分.

UPDATE: The bug isn't present if you do not include the asterisks in the argument to help. Therefore, the bug might arise because the displaying is done in the "Process" part of help(), and the code that clears the progress bar is located in the "End" part of the function.

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