Chapters/handling-errors/snippets.ps1
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Return "This is a snippets file not a script to run." # notice error behavior Get-Service -Name BITS, Foo, WinRM # try each in turn Get-Service -Name BITS, Foo, WinRM -EA Continue Get-Service -Name BITS, Foo, WinRM -EA SilentlyContinue Get-Service -Name BITS, Foo, WinRM -EA Inquire Get-Service -Name BITS, Foo, WinRM -EA Stop # moving from this... foreach ($computer in $Computername) { Write-Verbose "Querying $($computer.toUpper())" $params = @{ Classname = "Win32_OperatingSystem" Computername = $computer } $OS = Get-CimInstance @params # to this... foreach ($computer in $Computername) { Write-Verbose "Querying $($computer.toUpper())" $params = @{ Classname = "Win32_OperatingSystem" Computername = $computer ErrorAction = "Stop" } $OS = Get-CimInstance @params #try/catch foreach ($computer in $Computername) { Write-Verbose "Querying $($computer.toUpper())" $params = @{ Classname = "Win32_OperatingSystem" Computername = $computer ErrorAction = "Stop" } Try { $OS = Get-CimInstance @params $OK = $True } Catch { $OK = $False $msg = "Failed to get system information from $computer. $($_.Exception.Message)" Write-Warning $msg if ($ErrorLog) { Write-Verbose "Logging errors to $ErrorLog. Append = $ErrorAppend" "[$(Get-Date)] $msg" | Out-File -FilePath $ErrorLog -Append:$ErrorAppend } } if ($OK) { #only continue if successful $params.ClassName = "Win32_Processor" $cpu = Get-CimInstance @params ... # pseudo-code Try { $ErrorActionPreference = "Stop" # run something that doesn't have -ErrorAction $ErrorActionPreference = "Continue" } Catch { # ... } # pseudo-code Try { # something here generates an exception } Catch [Exception.Type.One] { # deal with that exception here } Catch [Exception.Type.Two] { # deal with the other exception here } Catch { # deal with anything else here } Finally { # run something else } |