write-host -foregroundcolor yellow 'You hit F5. This will run this whole script.'

$response = Read-Host -Prompt 'Did you really mean to run the entire script (y/n)?'

throw [System.ArgumentException] 'You CANNOT run using F5. Period. Please highlight and run selection with F8.'

FUNCTION Get-Drink($DrinkName)

{

Write-Verbose ('Ordered {0} for a drink!' -f $DrinkName)

}

$VerbosePreference = 'Continue'

Get-Drink 'Iced-Tea'

Get-Drink 'Brick!'

FUNCTION Get-Drink

{

param

(

[ValidateSet('Leamonde','Iced-Tea','Coffee','Water','Soda')]

[string] $DrinkName

)

Write-Verbose ('Ordered {0}' -f $DrinkName)

}

$VerbosePreference = 'Continue'

Get-Drink -DrinkName

FUNCTION Get-Drink

{

param

(

[ValidateScript({

(Get-Content c:\~tmp\drinks.txt) -Contains $_

})]

[string] $DrinkName

)

Write-Verbose ('Ordered {0}' -f $DrinkName)

}

Get-Content c:\~tmp\drinks.txt

$VerbosePreference = 'Continue'

Get-Drink -

Get-Drink -DrinkName Goffee

FUNCTION Get-Drink

{

param

(

[ValidateScript({

(Get-Content c:\~tmp\drinks.txt) -Contains $_

})]

[string] $DrinkName,

[ValidateRange(4,100)]

[string] $Age

)

Write-Verbose ('I am {0} years old and I ordered {1}' -f $Age, $DrinkName)

}

Get-Drink -DrinkName 'Coke' -Age 4

Get-Drink -DrinkName 'Beer' -Age 5

help about_Functions_Advanced_Parameters -ShowWindow

function Get-Drink

{

[CmdletBinding()]

Param(

[ValidateRange(4,100)]

[string] $Age

)

DynamicParam

{

# Set the dynamic parameters name

$ParameterName = 'DrinkName' ##<<<<<<<<<<<<<<<<<<<<<<<<-------------------------------

# Create the dictionary

$RuntimeParameterDictionary = New-Object System.Management.Automation.RuntimeDefinedParameterDictionary

# Create the collection of attributes

$AttributeCollection = New-Object System.Collections.ObjectModel.Collection[System.Attribute]

# Create and set the parameters' attributes

$ParameterAttribute = New-Object System.Management.Automation.ParameterAttribute

$ParameterAttribute.ValueFromPipeline = $true

$ParameterAttribute.ValueFromPipelineByPropertyName = $true

$ParameterAttribute.Mandatory = $true

$ParameterAttribute.Position = 0

# Add the attributes to the attributes collection

$AttributeCollection.Add($ParameterAttribute)

# Generate and set the ValidateSet

$arrSet = Get-Content C:\~Tmp\drinks.txt ##<<<<<<<<<<<<<<<<<<<<<<<<-------------------------------

$ValidateSetAttribute = New-Object System.Management.Automation.ValidateSetAttribute($arrSet)

# Add the ValidateSet to the attributes collection

$AttributeCollection.Add($ValidateSetAttribute)

# Create and return the dynamic parameter

$RuntimeParameter = New-Object System.Management.Automation.RuntimeDefinedParameter($ParameterName, [string], $AttributeCollection)

$RuntimeParameterDictionary.Add($ParameterName, $RuntimeParameter)

return $RuntimeParameterDictionary

}

Begin

{

# Bind the parameter to a friendly variable

$Drink = $PsBoundParameters[$ParameterName]

}

Process

{

Write-Verbose ('I am {0} years old and I ordered {1}' -f $Age, $DrinkName) #<<<<<<<<<<<<<<<<<<<<--------------------------

}

}

get-drink -Age 5 -DrinkName Beer

[53,72] The variable '$DrinkName' cannot be retrieved because it has not been set.

function Get-Drink

{

[CmdletBinding()]

Param(

[ValidateRange(4,100)]

[string] $Age

)

DynamicParam

{

# Set the dynamic parameters name

$ParameterName = 'DrinkName' ##<<<<<<<<<<<<<<<<<<<<<<<<-------------------------------

#Variable gets used later!

# Create the dictionary

$RuntimeParameterDictionary = New-Object System.Management.Automation.RuntimeDefinedParameterDictionary

# Create the collection of attributes

$AttributeCollection = New-Object System.Collections.ObjectModel.Collection[System.Attribute]

# Create and set the parameters' attributes

$ParameterAttribute = New-Object System.Management.Automation.ParameterAttribute

$ParameterAttribute.ValueFromPipeline = $true

$ParameterAttribute.ValueFromPipelineByPropertyName = $true

$ParameterAttribute.Mandatory = $true

$ParameterAttribute.Position = 0

# Add the attributes to the attributes collection

$AttributeCollection.Add($ParameterAttribute)

# Generate and set the ValidateSet

$arrSet = Get-Content C:\~Tmp\drinks.txt ##<<<<<<<<<<<<<<<<<<<<<<<<-------------------------------

$ValidateSetAttribute = New-Object System.Management.Automation.ValidateSetAttribute($arrSet)

# Add the ValidateSet to the attributes collection

$AttributeCollection.Add($ValidateSetAttribute)

# Create and return the dynamic parameter

$RuntimeParameter = New-Object System.Management.Automation.RuntimeDefinedParameter($ParameterName, [string], $AttributeCollection)

$RuntimeParameterDictionary.Add($ParameterName, $RuntimeParameter)

return $RuntimeParameterDictionary

}

Begin

{

# Bind the parameter to a friendly variable

$Drink = $PsBoundParameters[$ParameterName]

}

Process

{

Write-Verbose ('I am {0} years old and I ordered {1}' -f $Age, $Drink) #<<<<<<<<<<<<<<<<<<<<--------------------------

}

}

get-drink -Age 5 -DrinkName Beer

Function New-DynamicParam {

param(

[string]

$Name,

[System.Type]

$Type = [string],

[string[]]

$Alias = @(),

[string[]]

$ValidateSet,

[switch]

$Mandatory,

[string]

$ParameterSetName="__AllParameterSets",

[int]

$Position,

[switch]

$ValueFromPipelineByPropertyName,

[string]

$HelpMessage,

[validatescript({

if(-not ( $_ -is [System.Management.Automation.RuntimeDefinedParameterDictionary] -or -not $_) )

{

Throw "DPDictionary must be a System.Management.Automation.RuntimeDefinedParameterDictionary object, or not exist"

}

$True

})]

$DPDictionary = $false

)

#Create attribute object, add attributes, add to collection

$ParamAttr = New-Object System.Management.Automation.ParameterAttribute

$ParamAttr.ParameterSetName = $ParameterSetName

if($mandatory)

{

$ParamAttr.Mandatory = $True

}

if($Position -ne $null)

{

$ParamAttr.Position=$Position

}

if($ValueFromPipelineByPropertyName)

{

$ParamAttr.ValueFromPipelineByPropertyName = $True

}

if($HelpMessage)

{

$ParamAttr.HelpMessage = $HelpMessage

}

$AttributeCollection = New-Object 'Collections.ObjectModel.Collection[System.Attribute]'

$AttributeCollection.Add($ParamAttr)

#param validation set if specified

if($ValidateSet)

{

$ParamOptions = New-Object System.Management.Automation.ValidateSetAttribute -ArgumentList $ValidateSet

$AttributeCollection.Add($ParamOptions)

}

#Aliases if specified

if($Alias.count -gt 0) {

$ParamAlias = New-Object System.Management.Automation.AliasAttribute -ArgumentList $Alias

$AttributeCollection.Add($ParamAlias)

}

#Create the dynamic parameter

$Parameter = New-Object -TypeName System.Management.Automation.RuntimeDefinedParameter -ArgumentList @($Name, $Type, $AttributeCollection)

#Add the dynamic parameter to an existing dynamic parameter dictionary, or create the dictionary and add it

if($DPDictionary)

{

$DPDictionary.Add($Name, $Parameter)

}

else

{

$Dictionary = New-Object System.Management.Automation.RuntimeDefinedParameterDictionary

$Dictionary.Add($Name, $Parameter)

$Dictionary

}

}

Function Get-Drink

{

[CmdletBinding()]

Param(

[ValidateRange(4,100)]

[string] $Age

)

DynamicParam {

$options = Get-Content C:\~Tmp\drinks.txt

New-DynamicParam -Name DrinkName -ValidateSet $options -Position 1 -Mandatory

}

begin{

#have to manually populate

$drink = $PSBoundParameters.DrinkName

}

process{

Write-Verbose ('I am {0} years old and I ordered {1}' -f $Age, $drink)

}

}

get-drink -Age 5 -DrinkName Beer

Function Get-Drink

{

[CmdletBinding()]

Param(

[ValidateRange(4,100)]

[int] $Age

)

DynamicParam {

#Add dynamic parameters to $dictionary

if($Age -lt 21)

{

$options = (Get-Content C:\~Tmp\drinks.txt) | Where-Object {$_ -ne 'Beer'}

#write-verbose $options.Join(',')

}

else

{

$options = (Get-Content C:\~Tmp\drinks.txt)

}

New-DynamicParam -Name DrinkName -ValidateSet $options -Position 1 -Mandatory -HelpMessage 'Type in the drink name:'

}

begin{

#have to manually populate

$drink = $PSBoundParameters.DrinkName

}

process{

Write-Verbose "I am $Age years old and I ordered $drink"

}

}

get-drink -Age 5 -DrinkName