PowerShell - 覆盖用 Write-Host 编写的行 [英] PowerShell - Overwriting line written with Write-Host

问题描述

我正在尝试覆盖用 Write-Host 编写的 PowerShell 中的一行(我有一个循环运行的进程，我想在屏幕上显示更新的百分比).我试图做的是:

I'm trying to overwrite a line in PowerShell written with Write-Host (I have a process that's running in a loop and I want to show percentage updated on the screen). What I've tried to do is this:

Write-Host -NoNewline "`rWriting $outputFileName ($i/$fileCount)... $perc%"

但它不会覆盖该行，而是保留在同一行并附加到该行.

but instead of overwriting the line it stays on the same line and appends to it.

我在这里遗漏了什么?

谢谢

推荐答案

您不能覆盖 Powershell 窗口中的一行. 您可以使用 cls(Clear-Host) 将窗口清空:

You cannot overwrite a line in a Powershell window. What you can do is blank the window with cls(Clear-Host):

# loop code
cls
Write-Host "`rWriting $outputFileName ($i/$fileCount)... $perc%"
# end loop

但您真正应该使用的是 Write-Progress，一个专门为此目的构建的 cmdlet:

But what you should really be using is Write-Progress, a cmdlet built specifically for this purpose:

# loop code
Write-Progress -Activity "Writing $outputFileName" -PercentComplete $perc
# end loop

有关 Write-Progress 的更多信息，请访问:http://technet.microsoft.com/en-us/library/hh849902.aspx

More on Write-Progress here: http://technet.microsoft.com/en-us/library/hh849902.aspx

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