隐藏 Invoke-WebRequest 的进度

如何隐藏 Invoke-WebRequest的进度显示？我做了很多连续的请求，并有我自己的 Write-Progress显示器，我使用，所以我不需要内置的一个弹出下面，每次。

我使用从 Invoke-WebRequest的结果自动创建的 mshtml 结果(IE COM 对象) ，所以我不能切换到 WebClient或类似的东西，除非有人提供如何从 WebClient 请求获取 mshtml 对象的说明。

49627

$ProgressPreference = 'SilentlyContinue' # Subsequent calls do not display UI. Invoke-WebRequest ... $ProgressPreference = 'Continue' # Subsequent calls do display UI. Write-Progress ...

$ProgressPreference ------------------- Determines how Windows PowerShell responds to progress updates generated by a script, cmdlet or provider, such as the progress bars generated by the Write-Progress cmdlet. The Write-Progress cmdlet creates progress bars that depict the status of a command. Valid values: Stop: Does not display the progress bar. Instead, it displays an error message and stops executing. Inquire: Does not display the progress bar. Prompts for permission to continue. If you reply with Y or A, it displays the progress bar. Continue: Displays the progress bar and continues with (Default) execution. SilentlyContinue: Executes the command, but does not display the progress bar.

小开

下面是一个 可重用功能，它可以暂时隐藏任何 脚本块的进度，并在脚本块结束时自动恢复进度首选项，脚本块抛出 即使是例外(脚本终止错误)。

# Create an in-memory module so $ScriptBlock doesn't run in new scope
$null = New-Module {
function Invoke-WithoutProgress {
[CmdletBinding()]
param (
[Parameter(Mandatory)] [scriptblock] $ScriptBlock
)


# Save current progress preference and hide the progress
$prevProgressPreference = $global:ProgressPreference
$global:ProgressPreference = 'SilentlyContinue'


try {
# Run the script block in the scope of the caller of this module function
. $ScriptBlock
}
finally {
# Restore the original behavior
$global:ProgressPreference = $prevProgressPreference
}
}
}

用法例子:

Invoke-WithoutProgress {
# Here $ProgressPreference is set to 'SilentlyContinue'
Invoke-WebRequest ...
}


# Now $ProgressPreference is restored
Write-Progress ...

备注:

New-Module调用存在，所以脚本块传递给 Invoke-WithoutProgress 不能在新的范围内运行(允许它直接修改周围的变量，类似于 ForEach-Object的脚本块)。有关更多信息，请参见这个答案。