I am not understanding this. If I put the param at the top of my script then run the script with command line and specify a user name, the user name is assigned to $UserName
Param([string]$UserName)
If I wrap it in a function then run it from command line:
E.g: ./Script.ps1 -UserName BLAH
It's not being assigned to $UserName
Function MainFunction
{
Param([string]$UserName)
}
#Call Mainfunction
MainFunction;
Why is that?
Your code places the parameter in the scope of the function. When you run Script.ps1 -UserName BLAH this parameter would be passed in the scope of the script.
If you wanted to pass the variable down you would need two parameter blocks, one for the script and one for the function. Then pass script's UserName to the function as an argument of the function.
Param([string]$UserName)
Function MainFunction {
Param([string]$UserName)
}
MainFunction -UserName "Chuck Norris"
Alternatively you could use the UserName from the script scope inside of the function by using the $script: to use the variable from that scope.
Param([string]$UserName)
Function MainFunction {
Write-Output "Example use of $script:UserName"
}
MainFunction
Solution:
Function MainFunction
{
Param([string]$UserName)
Write-Host $UserName
}
#Call Mainfunction
MainFunction -UserName $args[0]
Call From CMD:
powershell -File "Script.ps1" "Chuck Norris"
