.net barcode reader sdk Getting Started with PowerShell in SharePoint 2010 in .NET

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Getting Started with PowerShell in SharePoint 2010
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The pipeline is one of the most important operators in Windows PowerShell It s used to combine a series of commands, sending the result of one command to the next Each command in the pipeline receives its input from the previous command Remember how Windows PowerShell works with objects instead of strings When you combine commands with a pipeline, you do not just send a simple string down the pipeline you send a rich object containing methods and properties Let s look at an example that shows how an object is passed from one command to another using a pipeline:
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PS > Get-SPSite -Identity http://SPServer01 | Get-SPWeb
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This example uses the Get-SPSite and Get-SPWeb cmdlets It binds to a site collection with the Get-SPSite cmdlet, and then sends the object through a pipeline to the Get-SPWeb cmdlet, which is used to return all subsites of the specified site, as shown in Figure 3-9
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Combining cmdlets with a pipeline
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The Get-SPWeb cmdlet supports the Identity parameter, which can take the URL of the target site as input But if you look at the help file for Get-SPWeb, you may notice that the type of this parameter is SPWebPipeBind, meaning that the value for it can also be obtained from the pipeline
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Using Select-Object in a Pipeline
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The Select-Object cmdlet offers a quick and easy way of gathering information from objects in Windows PowerShell Notice how the command in the previous example displayed only the URLs of the sites listed in a table, although the object has a lot more properties This is actually controlled by the formatting file stored in the SharePoint
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PowerShell for Microsoft SharePoint 2010 Administrators
application directory (the 14 hive) Let s see how to list more properties using the Select-Object cmdlet
PS > Get-SPSite -Identity http://SPServer01 | Get-SPWeb | >> Select-Object -Property Title, Url, Description Title ----Home Team Site Team Site Team Site Team Site Team Site Team Site Team Site Team Site Team Site Team Site Url --http://spserver01 http://spserver01/Web1 http://spserver01/Web10 http://spserver01/Web2 http://spserver01/Web3 http://spserver01/Web4 http://spserver01/Web5 http://spserver01/Web6 http://spserver01/Web7 http://spserver01/Web8 http://spserver01/Web9 Description ----------Home Web 1 Web 10 Web 2 Web 3 Web 4 Web 5 Web 6 Web 7 Web 8 Web 9
This example uses the Select-Object cmdlet to display the title, URL, and description of all subsites in a site collection The Select-Object cmdlet includes the First parameter, which allows you to select a number of objects from the beginning The following example retrieves a specified number of subsites in a site collection
PS > Get-SPSite -Identity http://SPServer01 | Get-SPWeb | >> Select-Object -Property Title, Url, Description -First 2 Title ----Home Team Site Url --http://spserver01 http://spserver01/Web1 Description ----------Home Web 1
If you want to select objects from the end, use the Last parameter The Select-Object cmdlet contains a great feature that allows you to create constructed (hash table-based) properties You can add constructed properties using a hash table with name and expression keys One thing that might seem a little odd is the $_ variable used in the constructed property The $_ variable is an automatic variable in Windows PowerShell It represents the current object in the pipeline In other words, it represents each object that goes through the pipeline and performs the calculation on each object To access the properties on an object with the $_ variable, you need to add a dot followed by the property you want to access The following example demonstrates how to access the Groups and SiteUsers properties
PS > Get-SPWeb http://SPServer01 | >> Select -Property Title, Description,
3:
Getting Started with PowerShell in SharePoint 2010
>> @{Name="Groups";Expression={$_GroupsCount}}, >> @{Name="SiteUsers";Expression={$_SiteUsersCount}} Title ----Home Description ----------Home Groups -----9 SiteUsers --------17
This example uses the Count property to calculate the actual number of site users and groups in the subsite If you want to select all properties from an object in Windows PowerShell, you can use Select-Object followed by an asterisk:
PS > Get-SPWeb -Identity http://SPServer01 | Select-Object -Property *
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