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如何使用 powershell 激活自定义电源计划？

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如何使用 powershell 激活自定义电源计划？

因此，有一种方法可以做到这一点，即使用powercfg /l。然后复制 GUID 并键入powercfg /s [GUID]。但我想知道有没有办法在不复制 GUID 的情况下做到这一点。因此，当您运行脚本时，您会立即激活自定义电源计划。我所说的自定义电源计划是终极性能。

答案1

将输出解析powercfg /l为 PSObjects

$powerSchemes = powercfg /l | ForEach-Object {
    if ($_ -match '^Power Scheme GUID:\s*([-0-9a-f]+)\s*\(([^)]+)\)\s*(\*)?') {
        [PsCustomObject]@{
            GUID       = $matches[1]
            SchemeName = $matches[2]
            Active     = $matches[3] -eq '*'
        }
    }
}

# if you want to view the schemes we've parsed into objects:
# $powerSchemes

接下来，在代码中从自定义名称中选择方案，例如：

$customScheme = $powerSchemes | Where-Object { $_.SchemeName -eq 'MyCustomPowerScheme' }

并使用以下命令将方案设置为活动方案（如果尚未激活）

if (!$customScheme.Active) {
    powercfg /s $($customScheme.GUID)
}

正则表达式详细信息：

^                       Assert position at the beginning of a line (at beginning of the string or after a line break character)
Power\ Scheme\ GUID:    Match the characters “Power Scheme GUID:” literally
\s                      Match a single character that is a “whitespace character” (spaces, tabs, line breaks, etc.)
   *                    Between zero and unlimited times, as many times as possible, giving back as needed (greedy)
(                       Match the regular expression below and capture its match into backreference number 1
   [-0-9a-f]            Match a single character present in the list below
                        The character “-”
                        A character in the range between “0” and “9”
                        A character in the range between “a” and “f”
      +                 Between one and unlimited times, as many times as possible, giving back as needed (greedy)
)                      
\s                      Match a single character that is a “whitespace character” (spaces, tabs, line breaks, etc.)
   *                    Between zero and unlimited times, as many times as possible, giving back as needed (greedy)
\(                      Match the character “(” literally
(                       Match the regular expression below and capture its match into backreference number 2
   [^)]                 Match any character that is NOT a “)”
      +                 Between one and unlimited times, as many times as possible, giving back as needed (greedy)
)                      
\)                      Match the character “)” literally
\s                      Match a single character that is a “whitespace character” (spaces, tabs, line breaks, etc.)
   *                    Between zero and unlimited times, as many times as possible, giving back as needed (greedy)
(                       Match the regular expression below and capture its match into backreference number 3
   \*                   Match the character “*” literally
)?                      Between zero and one times, as many times as possible, giving back as needed (greedy)

答案2

为了使用 PowerShell 激活自定义电源计划，您可以编写一个 PowerShell 脚本。在您需要执行的脚本中powercfg /l，解析 GUID 的输出，然后powercfg /s使用您之前找到的 GUID 进行调用。

如果你在编写脚本时遇到任何问题，请随时详细说明具体的编程问题https://stackoverflow.com/求助。

答案3

❖您还可以激活您的计划/方案： 
$(powercfg.exe /L) -match 'Ultimate'|% {powercfg.exe /S $_.split(" ")[3]}
$(powercfg.exe /L) -match ':'|% {$_}
❖ 结果： 
Power Scheme GUID: 381b4222-f694-41f0-9685-ff5bb260df2e  (Balanced)
Power Scheme GUID: 8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c  (High performance)
Power Scheme GUID: a1841308-3541-4fab-bc81-f71556f20b4a  (Power saver) *
Power Scheme GUID: e9a42b02-d5df-448d-aa00-03f14749eb61  (Ultimate Performance)
您可以通过简单地按空格过滤输出字符串来获得它，您的字符串位于包含以下内容的行的第 3 次出现中"You Plan/Scheme Name" 
$(powercfg.exe /L) -match 'Ultimate'|% {$_.split(" ")[3]}
❖ 结果： 
e9a42b02-d5df-448d-aa00-03f14749eb61

答案4

function Get-PowerScheme {
    param (
        [string]$SchemeName,
        [string]$SchemeGuid,
        [string]$SchemesDetails     # optional
    )

    if (($SchemeName) -and ($SchemeGuid)) {
        Write-Host "`n Error: only one criteria is permitted for searching a power scheme" -ForegroundColor "Red"
        Write-Host " '-SchemeName `"$SchemeName`"' and '-SchemeGuid `"$SchemeGuid`"' arguments can't be input together ...`n" -ForegroundColor "Red"
        return $Null
    }

    $PowerSchemeObjectArray = @()

    $SearchByName = $False
    if (([string]::IsNullOrWhiteSpace($SchemeGuid)) -and ($SchemeName)) { $SearchByName = $True }

    $SearchForAll = $False
    if (([string]::IsNullOrWhiteSpace($SchemeName)) -and ([string]::IsNullOrWhiteSpace($SchemeGuid))) { $SearchForAll = $True }

    if ([string]::IsNullOrWhiteSpace($SchemesDetails)) { $SchemesDetails = powercfg.exe -LIST | Out-String }
    $PowerSchemes = $SchemesDetails -split [Environment]::NewLine

    foreach ($PowerScheme in $PowerSchemes) {

        if ($PowerScheme -match "GUID") {

            # Extract the scheme power name between "(" and ")"
            $PowerSchemeName = $PowerScheme -match '\((.*?)\)'
            $PowerSchemeName = $matches[1]
            # Extract the scheme GUID between ":" and "(", then remove spaces
            $PowerSchemeGuid = $PowerScheme -match ':\s*(.*?)\('
            $PowerSchemeGuid = $matches[1].Trim()
            # Check if current power scheme is active
            $IsActive = $False
            if ($PowerScheme[-1] -eq "*") {$IsActive = $True}

            $PowerSchemeObject = [PSCustomObject]@{Name = $PowerSchemeName; GUID = $PowerSchemeGuid; IsActive = $IsActive}
            $AddPowerSchemeObject = $False

            if ($SearchForAll) {
                $AddPowerSchemeObject = $True
            } else {
                if ($SearchByName) {
                    if ($PowerSchemeName -match "$SchemeName") {
                        $AddPowerSchemeObject = $True
                    }
                } else {
                    if ($PowerSchemeGuid -match "$SchemeGuid") {
                        $AddPowerSchemeObject = $True
                    }
                }
            }
            if ($AddPowerSchemeObject) { $PowerSchemeObjectArray += $PowerSchemeObject }
        }
    }
    return $PowerSchemeObjectArray
}

$MyCustomPowerScheme = Get-PowerScheme -SchemeName "The Name of My Custom Power Plan"
$Result = powercfg.exe /SETACTIVE $MyCustomPowerScheme.GUID

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