Error: Variable is not assigned in the method: Unterschied zwischen den Versionen

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Zeile 21: Zeile 21:
 
}
 
}
  
−
$CustomClass = [CustomFunction]::new()
+
$CustomClass = [CustomClass]::new()
 
$CustomClass.GetVersion()
 
$CustomClass.GetVersion()
 
Write-Host $CustomClass.Version
 
Write-Host $CustomClass.Version
Zeile 41: Zeile 41:
 
}
 
}
  
−
$CustomClass = [CustomFunction]::new()
+
$CustomClass = [CustomClass]::new()
 
$CustomClass.GetVersion()
 
$CustomClass.GetVersion()
 
Write-Host $CustomClass.Version
 
Write-Host $CustomClass.Version

Aktuelle Version vom 16. August 2021, 13:27 Uhr

You are writing a own PowerShell class and get the following error "Variable is not assigned in the method". -> Here is the solution for this.

Error

Variable is not assigned in the method.


Cause

This error occurs because you are using a predefinied variable in a class method and the class method is in a different scope.


Example to reproduce the error

Class CustomClass {
    [String]$Version
 
    GetVersion() {
        If ($PSVersionTable) {
            $this.Version = $PSVersionTable.PSVersion
        }
    }
}
 
$CustomClass = [CustomClass]::new()
$CustomClass.GetVersion()
Write-Host $CustomClass.Version


Solution

  • Add the Scope to your variable ($GLOBAL:<YOUR_VARIABLE>)

Here the solution for the example above: 

Class CustomClass {
    [String]$Version
 
    GetVersion() {
        If ($GLOBAL:PSVersionTable) {
            $this.Version = $GLOBAL:PSVersionTable.PSVersion
        }
    }
}
 
$CustomClass = [CustomClass]::new()
$CustomClass.GetVersion()
Write-Host $CustomClass.Version
Von „http://wiki.webperfect.ch/index.php?title=Error:_Variable_is_not_assigned_in_the_method&oldid=2897“