PowerShell v2 Test if an Assembly is Loaded

As part of a function I was writing I came up with this test to see if an assembly needed to be loaded:

if(([appdomain]::currentdomain.getassemblies() | Where{$_ -match "System.Drawing"}) -eq $null)

{

     Write-Verbose "Loading System.Drawing assembly.";

     [Void] [System.Reflection.Assembly]::LoadFromPartialName("System.Drawing");

}

 Richard Siddaways post

Assemblies loaded in PowerShell

got me thinking in this direction. All I did was add the wrapper to test for a specific item. This could easily be modularized into a function:

function Load-Assembly

{

     [CmdletBinding()]

     param(

          [Parameter(

              Mandatory = $true,

              ValueFromPipeline = $true

          )]

          [ValidateNotNullOrEmpty()]

          [String]

          $AssemblyName,

         

          [Switch]

          $Report = $false

     )

     if(([appdomain]::currentdomain.getassemblies() | Where {$_ -match $AssemblyName}) -eq $null)

     {

          if($Report) {

              Write-Output "Loading $AssemblyName assembly.";

          }

          [Void] [System.Reflection.Assembly]::LoadFromPartialName($AssemblyName);

          return 1

     }

     else

     {

          if($Report) {     

              Write-Output "$AssemblyName is already loaded.";

          }

          return -1

     }

}

Load-Assembly -AssemblyName System.Drawing

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