COMMANDLETS in .NET

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External Commands
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All entries that are not recognized as commandlets or mathematical formulas are treated as external applications Classic command lines (such as pingexe, ipcon gexe, and netstatexe) can be executed, as can Windows applications
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The entry of c:\Windows\Notepadexe is thus possible to start the popular Windows Editor Likewise, Windows Script WSH scripts may be started from WPS Figure 22 shows the call of netstatexe At rst, the output remains un ltered In the second example, the commandlet Select-String has also been implemented As a result, only those lines are shown that contain the term LDAP
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Figure 22 Execution of netstat
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WARNING Sometimes an internal command of WPS (commandlet, alias, or function) will have the same name as an external command In such a case, WPS does not warn you of this ambiguity Instead, it executes the command according to the following preferences, in order: 1 2 3 4 Aliases Functions Commandlets External commands
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According to Windows settings in the registry, the standard application gets started and the document is downloaded when le paths are entered Filenames have to be marked by quotation marks only when they contain blanks
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Knowing how to get help is of primary importance when you begin using new software This section describes the help functions included in the WPS console and external help les, too
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Getting a list of Available Commands
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To get a list of all available commandlets, enter the following:
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Get-Command
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Patterns are also valid:
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Get-Command get-* delivers all commands starting with get Get-Command [gs]et-* delivers all commands starting with get or set Get-Command *-Service delivers all commands containing the noun Service Get-Command noun Service also delivers all commands containing the noun Service
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You can also use the commandlet Get-Command to gather information about what WPS regards as a command Get-Command searches in commandlet names, aliases, functions, script les, and executable les (see Figure 23) If you write the name of an exe le after Get-Command, WPS shows the path where you can nd the executable le The search takes place only in paths that are included in the environment variable %Path% The following command shows a list of all directly callable executable les:
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Get-Command *exe
Getting Commandlet Help
You can request help text about a speci c commandlet with Get-Help commandletname (for example, Get-Help Get-Process; see Figure 24)
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Commandlets
Figure 23 Example for the use of Get-Command By using the parameters detailed and full, you can get more help On the other hand, Get-Help get lists all commandlets that use the verb get Help text language is based on the installed language version of WPS
TIP Alternatively to calling Get-Help, you can also add the general parameter - to the commandlet (for example, Get-Process - ) If you do so, you get a short version of help, but no option for the more detailed versions
Getting Help
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Figure 24 Clipping from help text referring to the commandlet Get-Process A graphic help le for WPS in CHM le format has been available since the end of May 2007 (half a year after the of cial launch of WPS 10) as a separate download at Microsoftcom [MS01]
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Commandlets
Figure 25 Help le for WPS This CHM also contains advice about the manual transfer of VBScript code to WPS (see Figure 26)
Documentation of NET Classes
For more information aboutNET classes with which WPS works, check out the following resources:
WPS documentation for the namespace SystemManagement
Automation
NET Framework software development kit or Windows software development kit for NET 35 or Visual Studio 2008
Getting Help
Product-speci c documentation (for example, Exchange Server 2007 documentation)
2 COMMANDLETS
Figure 26 Help referring to the transfer of VBScript to WPS The documentation shows the available class members (properties, methods, events, constructors; see Figure 27)
NOTE Because the documentation concerning NET classes has been written for developers, it is often too detailed for WPS users Unfortunately, there is currently no version in sight adapted to the needs of administrators