🛡️

Error Handling

Catch exceptions, control error behavior, and validate input.

try / catch / finally

Handle a terminating error gracefully.

try {
    Get-Content ".\missing.txt" -ErrorAction Stop
} catch {
    Write-Warning "Failed: $($_.Exception.Message)"
}

Handle different errors differently.

try {
    1 / 0
} catch [System.DivideByZeroException] {
    "Cannot divide by zero"
} catch {
    "Some other error: $_"
}

Always run cleanup, error or not.

try {
    $conn = "open"
    # ... work ...
} finally {
    Write-Host "Cleaning up"
}

Force a cmdlet error into the catch block.

Remove-Item .\x.txt -ErrorAction Stop

Silently ignore non-critical errors.

Get-ChildItem .\maybe -ErrorAction SilentlyContinue

Treat all errors as terminating in a script.

$ErrorActionPreference = "Stop"

Raise a custom terminating error.

if (-not $path) {
    throw "Path is required"
}