The Big Book of PowerShell Error Handling

The Big Book of PowerShell Error Handling

Introduction

1. What is error handling?
2. How this book is organized

Powershell Error Handling Basics

1. ErrorRecords and Exceptions
2. Terminating versus Non-Terminating Errors

Controlling Error Reporting Behavior and Intercepting Errors

1. The $Error Variable
2. ErrorVariable
3. $MaximumErrorCount
4. ErrorAction and $ErrorActionPreference
5. Try/Catch/Finally
6. Trap
7. The $LASTEXITCODE Variable
8. The $? Variable
9. Summary

Analysis of Error Handling Test Results

1. Intercepting Non-Terminating Errors
2. Intercepting Terminating Errors
3. Effects of setting ErrorAction or $ErrorActionPreference
4. How PowerShell behaves when it encounters unhandled terminating errors
5. Conclusions

Putting It All Together

1. Suppressing errors (Mostly, don’t do this)
2. The $? variable (Use it at your own risk)
3. Determining what types of errors can be produced by a command
4. Dealing with Terminating Errors
5. Dealing with Non-Terminating Errors
6. Calling external programs

Afterword