PS > C:\Scripts\myScriptps1 "hey" "hey" hey hey in .NET framework

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PS > C:\Scripts\myScriptps1 "hey" "hey" hey hey
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If the directory name contains whitespace, you can use the call operator (&) to execute the script Here s an example:
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PS > & 'C:\My Scripts\myScriptps1' "hey" hey
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Using Parameters in Scripts
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The param statement is used to add parameters to scripts The param statement must be the first executed line of code in a script (except for comments or comment-based help) Script parameters work in the same way as function parameters, as discussed earlier in this chapter The following shows a basic script using parameters
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param([string]$firstname, [string]$lastname) "FirstName: $firstname" "LastName: $lastName"
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We can execute the script by typing \, the script name (myScriptpsi in this example), followed by the parameters
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PS > \myScriptps1 -firstname Niklas -lastname Goude FirstName: Niklas LastName: Goude
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Writing Comment-Based Help Topics in Scripts
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Cmdlets in Windows PowerShell include a help topic that describes how to use the cmdlets in Windows PowerShell When writing scripts, you can add a custom commentbased help topic using a comment block (enclosed with <# and #> ) containing at least one keyword Some of the valid keywords are synopsis, description, parameter (followed by the parameter name), example, inputs, outputs, notes, links, component, role, and functionality Here is an example that demonstrates how to add a comment-based help topic to a script in Windows PowerShell:
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<# SYNOPSIS Displays firstname and lastname
PowerShell for Microsoft SharePoint 2010 Administrators
DESCRIPTION The myScriptps1 script displays the firstname and lastname PARAMETER firstname Specifies the users firstname PARAMETER lastname specifies the users lastname OUTPUTS SystemString myScriptps1 returns a string with the users firstname and lastname EXAMPLE PS > \myScriptps1 Niklas Goude FirstName: Niklas LastName: Goude #> param([string]$firstname, [string]$lastname) "FirstName: $firstname" "LastName: $lastName"
When a comment-based help topic is added to a script, you can use the Get-Help cmdlet to display the help topic in the session Here is how we could display the help topics added to the previous script:
PS > Get-Help \myScriptps1 -Examples NAME C:\Scripts\myScriptps1 SYNOPSIS Displays firstname and lastname -------------------------- EXAMPLE 1 -------------------------PS >\myScriptps1 Niklas Goude
FirstName: Niklas LastName: Goude
Using Functions in Scripts
You can add functions in a script by placing them at the top of the script (This might seem strange if you are used to VBScript) Since Windows PowerShell reads the script from top to bottom, an error will occur if a function is called before it has been read into memory
8:
Functions, Scripts, and Remoting
Here is an example of a Windows PowerShell script that includes a function:
param([string]$Identity) function Check-Url([uri]$url) { if($urlAbsoluteUri -ne $Null -and $urlScheme -match 'http|https') { $true } else { $false } } if(Check-Url -url $Identity) { Get-SPWeb -Identity $Identity } else { Write-Host "Invalid URL" }
This script starts with a param statement, where we define the script parameters Here, we use the type SystemString for the input parameter Next, we add our function to the script At the bottom of the script, we add our code that executes when the script is run We start off by validating the URL passed to the script If the URL is valid, the script attempts to run the Get-SPWeb cmdlet If not, the script returns Invalid URL
Customizing Windows PowerShell with Profile Scripts
Profile scripts run automatically when Windows PowerShell starts Using profile scripts, you can customize the Windows PowerShell environment and add commands, aliases, functions, variables, snap-ins, and drives to every Windows PowerShell session that you start Windows PowerShell supports the four basic profile scripts shown Table 8-1
Path $PSHOME\ $PSHOME\
Filename profileps1 MicrosoftPowerShell_ profileps1
Shells All shells
User All users
Microsoft All users PowerShell shell All shells Current user
$HOME\My Documents\ profileps1 WindowsPowerShell\ $HOME\ My Documents\ MicrosoftPowerShell_ WindowsPowerShell\ profileps1
Microsoft Current PowerShell shell user
Table 8-1 Windows PowerShell Profile Scripts
PowerShell for Microsoft SharePoint 2010 Administrators
Table 8-1 shows how different profile scripts affect different users and shells For instance, a profile script named profileps1 placed in the Windows PowerShell root folder affects all users A profile script with the same name placed in the user s home folder affects only that user For example, if we wanted all Windows PowerShell sessions to start by displaying Hello followed by the current user s name, we would create a new profile script in the Windows PowerShell root folder and place the following code in that profile script:
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