How to make a namespace within a PowerShell script

Question

I would like to utilize my own custom namespaces in a PowerShell .ps1 script or a .psm1 module. Is this possible? If so, what is the syntax to do this?

I found a related link here: Breaking the Powershell namespace limit of global,script

It seems like I will need to make my own custom object, or possibly use a custom associative array for this?

I would like to be able to call my function like this:

[MyCoolNamespace]::Get-CrazyYall

Jason Shirk · Accepted Answer · 2014-11-12 18:11:16Z

19

A module name is similar to a namespace. For example:

Microsoft.PowerShell.Core\Get-Command

is the same as

Get-Command

Normally you don't use module qualified names when invoking commands (cmdlets, functions, or aliases), but it comes in handy if you do have a conflict or want to be 100% certain you are invoking the function you meant to.

answered Nov 12, 2014 at 18:11

Jason Shirk

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3 Comments

Josh Petitt Over a year ago

thanks! I think this is actually more along the line of what I want to do. Basically I wanted a namespace so I didn't have to write out long function names (i.e. pseudo namespace).

Josh Petitt Over a year ago

I accepted this because it was "pure" PowerShell and provides what I wanted, albeit with a different name...

maoizm Over a year ago

This is far from complete: for example I cannot reach variables exported from the module. Functions and aliases are visible indeed

Ansgar Wiechers · Accepted Answer · 2017-09-05 13:29:24Z

10

Create a custom type with a static method:

PS C:\> Add-Type @'
>> using System;
>> public class MyCoolNamespace {
>>   public static string Foo() {
>>     return "Foo";
>>   }
>> }
>> '@
>>
PS C:\> [MyCoolNamespace]::Foo()
Foo

edited Sep 5, 2017 at 13:29

answered Nov 12, 2014 at 17:56

Ansgar Wiechers

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3 Comments

Josh Petitt Over a year ago

thanks! I guess it's only possible by reverting back to C# syntax? I was hoping to write my functions in PowerShell, but put them in a namespace. Is this possible? Is it easy? For instance, what if I already have the function Get-Foo written in PowerShell?

Ansgar Wiechers Over a year ago

I'm not aware of a way to do this in plain PowerShell.

Mike Q Over a year ago

To me this doesn't answer the question because it's just leveraging C#.

SYNtAX · Accepted Answer · 2017-07-27 15:20:54Z

2

You could try using PSTypeNames.

$Var = [PSCustomObject]@{
    foo = [string]::Empty
    bar = $false
}

$Var.PSTypeNames.Insert(0, 'My.Namespace')

$var | get-member

answered Jul 27, 2017 at 15:20

SYNtAX

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1 Comment

Mike Q Over a year ago

This doesn't seem like a good practice.

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