{"id":8721,"date":"2007-01-23T14:01:00","date_gmt":"2007-01-23T14:01:00","guid":{"rendered":"https:\/\/blogs.msdn.microsoft.com\/powershell\/2007\/01\/23\/how-to-create-enum-in-powershell\/"},"modified":"2019-02-18T13:20:51","modified_gmt":"2019-02-18T20:20:51","slug":"how-to-create-enum-in-powershell","status":"publish","type":"post","link":"https:\/\/devblogs.microsoft.com\/powershell\/how-to-create-enum-in-powershell\/","title":{"rendered":"How to create enum in PowerShell?"},"content":{"rendered":"

[Updated to comply with the naming guidelines (create=>new)]<\/p>\n

Dynamic assembly emitting techniques can be used to create new classes or data types in PowerShell. Trick is that right permission needs to be set so that data types created in dynamic assembly can be used subsequently. <\/p>\n

Following is an example for creating a new enum type and use it in powershell. <\/p>\n

PS> cat enum.ps1<\/font><\/span><\/p>\n

function New-Enum ([string] $name)<\/font><\/span><\/p>\n

{<\/font><\/span><\/p>\n

    $appdomain = [System.Threading.Thread]::GetDomain()<\/font><\/span><\/p>\n

    $assembly = new-object System.Reflection.AssemblyName<\/font><\/span><\/p>\n

    $assembly.Name = “EmittedEnum”<\/font><\/span><\/p>\n

<\/font> <\/p>\n

$assemblyBuilder = $appdomain.DefineDynamicAssembly($assembly, <\/font><\/span><\/p>\n

[System.Reflection.Emit.AssemblyBuilderAccess]::Save -bor [System.Reflection.Emit.AssemblyBuilderAccess]::Run);<\/font><\/span><\/p>\n

    $moduleBuilder = $assemblyBuilder.DefineDynamicModule(“DynamicModule”, “DynamicModule.mod”);<\/font><\/span><\/p>\n

    $enumBuilder = $moduleBuilder.DefineEnum($name, [System.Reflection.TypeAttributes]::Public, [System.Int32]);<\/font><\/span><\/p>\n

<\/font> <\/p>\n

    for($i = 0; $i -lt $args.Length; $i++)<\/font><\/span><\/p>\n

    {<\/font><\/span><\/p>\n

        $null = $enumBuilder.DefineLiteral($args[$i], $i);<\/font><\/span><\/p>\n

    }<\/font><\/span><\/p>\n

<\/font> <\/p>\n

    $enumBuilder.CreateType() > $null;<\/font><\/span><\/p>\n

}<\/font><\/span><\/p>\n

PS> . ‘C:\\Documents and Settings\\gxie\\enum.ps1’<\/font><\/span><\/p>\n

PS > New-Enum my.color blue red yellow<\/font><\/span><\/p>\n

PS > [my.color]::blue<\/font><\/span><\/p>\n

blue<\/font><\/span><\/p>\n

PS > [my.color]::red<\/font><\/span><\/p>\n

red<\/font><\/span><\/p>\n

PS > [my.color]::yellow<\/font><\/span><\/p>\n

yellow<\/font><\/span><\/p>\n

PS > [my.color]::black<\/font><\/span><\/p>\n

PS ><\/font><\/span> <\/p>\n

– George from PowerShell Team<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

[Updated to comply with the naming guidelines (create=>new)] Dynamic assembly emitting techniques can be used to create new classes or data types in PowerShell. Trick is that right permission needs to be set so that data types created in dynamic assembly can be used subsequently. Following is an example for creating a new enum type and use it […]<\/p>\n","protected":false},"author":600,"featured_media":13641,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-8721","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-powershell"],"acf":[],"blog_post_summary":"

[Updated to comply with the naming guidelines (create=>new)] Dynamic assembly emitting techniques can be used to create new classes or data types in PowerShell. Trick is that right permission needs to be set so that data types created in dynamic assembly can be used subsequently. Following is an example for creating a new enum type and use it […]<\/p>\n","_links":{"self":[{"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/posts\/8721","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/users\/600"}],"replies":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/comments?post=8721"}],"version-history":[{"count":0,"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/posts\/8721\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/media\/13641"}],"wp:attachment":[{"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/media?parent=8721"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/categories?post=8721"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/tags?post=8721"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}