[Solved] You want to create a function that accepts a parameter Mode which must be either 'Auto', 'Manual', or 'Semi'.... Which parameter validation attributes should you use together? | PowerShell

PowerShell - Scripting Best Practices

You want to create a function that accepts a parameter Mode which must be either 'Auto', 'Manual', or 'Semi'. Additionally, the parameter should never be empty or null. Which parameter validation attributes should you use together?

A[ValidatePattern('Auto|Manual|Semi')][ValidateLength(1,10)]

B[ValidateRange('Auto','Semi')][ValidateNotNullOrEmpty()]

C[ValidateSet('Auto','Manual','Semi')][ValidateLength(11,20)]

D[ValidateSet('Auto','Manual','Semi')][ValidateNotNullOrEmpty()]

Step-by-Step Solution

Solution:

Step 1: Choose attribute for allowed values
[ValidateSet('Auto','Manual','Semi')] restricts values to these three options.
Step 2: Ensure parameter is not empty or null
[ValidateNotNullOrEmpty()] prevents empty or null inputs.
Final Answer:
[ValidateSet('Auto','Manual','Semi')][ValidateNotNullOrEmpty()] -> Option D
Quick Check:
Combine ValidateSet and ValidateNotNullOrEmpty for fixed non-empty values [OK]

Quick Trick: Combine ValidateSet and ValidateNotNullOrEmpty to restrict and require input [OK]

Common Mistakes:

Using ValidateRange for strings
Using ValidateLength without null check
Confusing regex with ValidateSet

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Which parameter validation attributes should you use together?

Step 1: Choose attribute for allowed values

Step 2: Ensure parameter is not empty or null

Final Answer:

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