February 2019
Intermediate to advanced
626 pages
15h 51m
English
Content preview from Mastering Windows PowerShell Scripting - Third Edition
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Validation attributes
PowerShell offers a number of validation attributes to test the content of arguments passed to parameters. There are two general classes of validation attribute; the first validates the argument as a single object, which tests the value as a whole:
- ValidateNotNull
- ValidateNotNullOrEmpty
- ValidateCount
- ValidateDrive
The second validates enumerated arguments. These validation attributes can be applied to parameters that accept arrays. The validation step applies to each element in the array. The enumerated argument validation attributes are:
- ValidateLength
- ValidatePattern
- ValidateRange
- ValidateScript
- ValidateSet
The validation attributes are documented in about_Functions_Advanced_Parameters with the exception of the ...
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I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.