February 2019
Intermediate to advanced
626 pages
15h 51m
English
Content preview from Mastering Windows PowerShell Scripting - Third Edition
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The ValidateCount attribute
ValidateCount is used to test the size of an array supplied to a parameter. The attribute expects a minimum and maximum length for the array.
ValidateCount only has meaning when applied to an array-type parameter, for example:
function Test-ValidateCount { [CmdletBinding()] param ( [ValidateCount(1, 1)] [String[]]$Parameter1 )}
ValidateCount may also be applied to parameters that accept more advanced array types, such as [System.Collections.ArrayList] or [System.Collections.Generic.List[String]].
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