PowerShell Fist programming(1)：如何使用cmdlets來新增和設定rigistry key

我們試著執行一個example，在HKEY_LOCAL_MACHINE\SOFTWARE底下建立一個新的"MyKey"的registry key，和將該registry key的default value設定為"MyValue"。

·         使用PowerShell console

使用New-Item cmdlet新增"MyKey" 的registry key和寫入"MyValue"的default value的command如下：

New-Item -Path HKLM:\Software\MyKey -Value "MyValue"

新增的registry key和寫入該key的default value，結果如下：

·         使用powrshell script

以下是PowerShell script的sample

1、將寫好的script存成.ps1檔案。

2、在Powershell consol執行.ps1檔案

新增的registry key和寫入該key的default value，結果如下：

Note：

Predefined root keys

There are seven predefined root keys, traditionally named according to their constant handles defined in the Win32 API, or by synonymous abbreviations (depending on applications):

·         HKEY_LOCAL_MACHINE or HKLM

·         HKEY_CURRENT_CONFIG or HKCC (only in Windows 9x/Me and NT-based versions of Windows)

·         HKEY_CLASSES_ROOT or HKCR

·         HKEY_CURRENT_USER or HKCU

·         HKEY_USERS or HKU

·         HKEY_PERFORMANCE_DATA (only in NT-based versions of Windows, but invisible in the Windows Registry Editor)

·         HKEY_DYN_DATA (only in Windows 9x/Me, and visible in the Windows Registry Editor)

Note：

以上的sample為使用New-Item cmdlet來新增registry key和寫入default value，該單一的指令可以細分為以下三的步驟：

Step1、使用 New-Item cmdlet建立一個registry key 。

Step 2、使用 Set-Item cmdlet 來assign一個default value到registry key。

以下為詳細說明：

Step1、 Use PowerShell to Easily Create New Registry Keys

1、Store the current working location by using the Push-Location cmdlet.

2、Change the current working location to the appropriate registry drive( HKEY_LOCAL_MACHINE,HKLM) by using the Set-Location cmdlet.

3、Use the Test-Path cmdlet to determine if the "SOFTWARE\MyKey" registry key already exists(傳回False).

4、Use the New-Item cmdlet to create the new registry key.

5、Use the Pop-Location cmdlet to return to the starting working location.

The newly created registry key is shown here in the Registry Editor tool.

Step2、 Setting the default value for the key

在上一步驟還未設定 registry key 的default value，我們可以使用 Set-Item cmdlet來assign一個default value給registry key。

如以下的步驟：

1. Supply the default value in the Value parameter of the Set-Item cmdlet.

The following command assigns the value "MyValue" to the default property value of the MyKey registry key that is contained in the HKCU:\Software location.

Set-Item -Path HKLM:\Software\MyKey -Value "MyValue"

The command does not return any information to the Windows PowerShell console when it runs. The modified registry key is shown here in the Registry Editor tool.