Windows Powershell Where-Object 條件過濾

2020-10-29 21:02:15

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過濾管道結果

使用Get-Process返回所有的當前進程，但是你可能并不對所有的進程感興趣，然后通過每個Process對象的屬性進行過濾。首先得知道每個對象支持那些屬性。

復制代碼代碼如下:

PS C:Powershell> Get-Process | select -First 1 | fl *

__NounName                 : Process
Name                       : AcroRd32
Handles                    : 287
VM                         : 234819584
WS                         : 32616448
PM                         : 63488000
NPM                        : 14584
Path                       : C:Program FilesAdobeReader 10.0ReaderAcroRd32
                             .exe
Company                    : Adobe Systems Incorporated
CPU                        : 96.5334188
FileVersion                : 10.1.2.45
ProductVersion             : 10.1.2.45
Description                : Adobe Reader
Product                    : Adobe Reader
Id                         : 4820
PriorityClass              : Normal
HandleCount                : 287
WorkingSet                 : 32616448
PagedMemorySize            : 63488000
PrivateMemorySize          : 63488000
VirtualMemorySize          : 234819584
TotalProcessorTime         : 00:01:36.5334188
BasePriority               : 8
ExitCode                   :
HasExited                  : False
ExitTime                   :
Handle                     : 3568
MachineName                : .
MainWindowHandle           : 198686
MainWindowTitle            : Mastering PowerShell - Adobe Reader
MainModule                 : System.Diagnostics.ProcessModule (AcroRd32.exe)
MaxWorkingSet              : 1413120
MinWorkingSet              : 204800
Modules                    : {System.Diagnostics.ProcessModule (AcroRd32.exe),
                             System.Diagnostics.ProcessModule (ntdll.dll), Syst
                             em.Diagnostics.ProcessModule (kernel32.dll), Syste
                             m.Diagnostics.ProcessModule (KERNELBASE.dll)...}
NonpagedSystemMemorySize   : 14584
NonpagedSystemMemorySize64 : 14584
PagedMemorySize64          : 63488000
PagedSystemMemorySize      : 302460
PagedSystemMemorySize64    : 302460
PeakPagedMemorySize        : 75399168
PeakPagedMemorySize64      : 75399168
PeakWorkingSet             : 87871488
PeakWorkingSet64           : 87871488
PeakVirtualMemorySize      : 257703936
PeakVirtualMemorySize64    : 257703936
PriorityBoostEnabled       : True
PrivateMemorySize64        : 63488000
PrivilegedProcessorTime    : 00:00:27.7057776
ProcessName                : AcroRd32
ProcessorAffinity          : 3
Responding                 : True
SessionId                  : 1
StartInfo                  : System.Diagnostics.ProcessStartInfo
StartTime                  : 2012/1/13 10:25:34
SynchronizingObject        :
Threads                    : {4376, 6636, 8096, 5136...}
UserProcessorTime          : 00:01:08.8276412
VirtualMemorySize64        : 234819584
EnableRaisingEvents        : False
StandardInput              :
StandardOutput             :
StandardError              :
WorkingSet64               : 32616448
Site                       :
Container                  :

根據進程名過濾所有記事本進程。

復制代碼代碼如下:

PS C:Powershell> Get-Process | Where-Object {$_.Name -eq "notepad"}

Handles NPM(K)    PM(K)      WS(K) VM(M)   CPU(s)     Id ProcessName
------- ------    -----      ----- -----   ------     -- -----------
    158       7     8800      37264   114    18.41   6204 notepad

根據進程名過濾所有IE進程。

復制代碼代碼如下:

PS C:Powershell> Get-Process | Where-Object {$_.Name -eq "iexplore"}

Handles NPM(K)    PM(K)      WS(K) VM(M)   CPU(s)     Id ProcessName
------- ------    -----      ----- -----   ------     -- -----------
    710      23    12832      18160   175    10.51   4204 iexplore
    971      39    81000     107580   399    22.20   6764 iexplore
    336      13    28516      20096   187     0.34   6792 iexplore
    929      35    51020      46568   314    10.42   7192 iexplore
    835      26    49200      32360   308     7.82   7952 iexplore

根據company過濾所有產品發布者以”Microsoft”打頭的進程：

復制代碼代碼如下:

PS C:Powershell> Get-Process | Where-Object {$_.company -like '*Microsoft*' }|
select Name,Description,Company
msseces                    Microsoft Security Clie... Microsoft Corporation
notepad                    記事本                     Microsoft Corporation
ONENOTEM                   Microsoft OneNote Quick... Microsoft Corporation
OUTLOOK                    Microsoft Outlook          Microsoft Corporation
powershell                 Windows PowerShell         Microsoft Corporation
prevhost                   Preview Handler Surroga... Microsoft Corporation
RDCMan                     RDCMan                     Microsoft Corporation
SearchProtocolHost         Microsoft Windows Searc... Microsoft Corporation
taskhost                   Windows 任務的主機進程     Microsoft Corporation

使用別名

因為Where-Object的使用概率比較高，所以有一個很形象的別名？可以使用：

復制代碼代碼如下:

PS C:Powershell> Get-Service | ? {$_.Name -like "B*"}

Status   Name               DisplayName
------   ----               -----------
Running BDESVC             BitLocker Drive Encryption Service
Running BFE                Base Filtering Engine
Running BITS               Background Intelligent Transfer Ser...
Stopped Browser            Computer Browser
Stopped bthserv            Bluetooth Support Service

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