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對(duì)管道對(duì)象逐個(gè)處理

如果使用Get-WmiObject 獲取系統(tǒng)中的服務(wù)，為了排版可能會(huì)也會(huì)使用Format-Table對(duì)結(jié)果進(jìn)行表格排版。

復(fù)制代碼代碼如下:

PS C:Powershell> Get-WmiObject Win32_Service | Format-Table status,DisplayName
-AutoSize

status DisplayName
------ -----------
OK     Adobe Acrobat Update Service
OK     Application Experience
OK     Application Layer Gateway Service
OK     Application Host Helper Service
OK     Application Identity
OK     Application Information
OK     Application Management
OK     ASP.NET State Service

但是如果想對(duì)每個(gè)服務(wù)進(jìn)行更定制化的處理可是使用ForEach-Object

復(fù)制代碼代碼如下:

PS C:Powershell> Get-WmiObject Win32_Service | ForEach-Object {"Name:"+ $_.Disp

layName, ", Is ProcessId more than 100:" + ($_.ProcessId -gt 100)}

Name:Adobe Acrobat Update Service , Is ProcessId more than 100:True

Name:Application Experience , Is ProcessId more than 100:False

Name:Application Layer Gateway Service , Is ProcessId more than 100:False

Name:Application Host Helper Service , Is ProcessId more than 100:True

Name:Application Identity , Is ProcessId more than 100:True

Name:Application Information , Is ProcessId more than 100:True

Name:Application Management , Is ProcessId more than 100:False

Name:ASP.NET State Service , Is ProcessId more than 100:False

結(jié)合條件處理

ForEach-Object的處理可以包含任意Powershell腳本，當(dāng)然也包括條件語句

復(fù)制代碼代碼如下:

Get-WmiObject Win32_Service | ForEach-Object {

    if ($_.ProcessId -gt 3000)

    { "{0}({1})" -f $_.DisplayName,$_.ProcessID}

}

Windows Presentation Foundation Font Cache 3.0.0.0(5408)

Microsoft Network Inspection(5260)

BranchCache(4112)

Windows Modules Installer(7656)

調(diào)用方法

在ForEach-Object中，$_代表當(dāng)前對(duì)象，當(dāng)然也允許通過$_,調(diào)用該對(duì)象支持的方法。
下面的例子殺死所有IE瀏覽器進(jìn)程：

復(fù)制代碼代碼如下:

PS C:Powershell> Get-Process iexplore

Handles NPM(K)    PM(K)      WS(K) VM(M)   CPU(s)     Id ProcessName
------- ------    -----      ----- -----   ------     -- -----------
    883      29    14728      22432   181    34.26   4300 iexplore
    771      28    55552     129152   425     8.56   5732 iexplore
   1216      51   104324     143916   539   572.41   5912 iexplore
    801      25    49200      25372   285     5.99   6252 iexplore
    691      25    57564      95796   333     8.08   6388 iexplore
   1256      38    85848     127012   379    20.37   7856 iexplore

PS C:Powershell> Get-Process iexplore | ForEach-Object {$_.kill()}
PS C:Powershell> Get-Process iexplore
Get-Process : 找不到名為“iexplore”的進(jìn)程。請(qǐng)驗(yàn)證該進(jìn)程名稱，然后再次調(diào)用 cmdlet。
所在位置行:1 字符: 12
+ Get-Process iexplore
+ CategoryInfo : ObjectNotFound: (iexplore:String) [Get-Process],
ProcessCommandException
+ FullyQualifiedErrorId : NoProcessFoundForGivenName,Microsoft.PowerShell.
Commands.GetProcessCommand

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