How do I prevent a class from being registered twice? #27310
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In the static constructor for one of my script classes, I'm using the This sometimes throws an In the static constructor, I don't seem to be able to tell whether the What is a safe way of checking whether a script class has already been registered in the current namespace within the static constructor of the class? I'd like to avoid using |
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Replies: 2 comments 1 reply
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if (-not (Get-TypeData -TypeName 'MyNs.ClassName')) {
Update-TypeData -TypeName 'MyNs.ClassName' -MemberName 'Foo' -MemberType ScriptProperty -Value { … }
}No |
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Thank you for clarifying, @MukundaKatta! 👍 I guess my mistake was to look for the corresponding member to exist in the static constructor, like this: (Get-TypeData -TypeName 'MyNs.MyClass').Members['MyScriptProperty'] |
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@MukundaKatta — thank you for the clear answer! |
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Get-TypeDatadoesn't throw for unknown types in PS 7+ — it just returns$null. So the pattern is:No
try/catchneeded. If you're on 5.1,$nullis still returned for unknown types there — the throwing behavior might be something else in your stack.