Validation attribute classes

PowerShell classes may be used to build custom validation attributes. This might act as an alternative to ValidateScript in some respects.

Validation attributes must inherit from either ValidateArgumentsAttribute or ValidateEnumeratedArgumentsAttribute.

Validators are most often used with parameters in scripts and functions, but they may be used with any variable.

ValidateArgumentsAttribute

Validators that inherit from ValidateArgumentsAttribute are somewhat difficult to define. The existing validators, such as ValidateNotNullOrEmpty and ValidateCount, catch most of the possible uses. Validation is more often interested in testing whether the value of parameter is an array.

Classes that inherit...