Book Image

Mastering Windows PowerShell Scripting (Second Edition) - Second Edition

By : Brenton J.W. Blawat
Book Image

Mastering Windows PowerShell Scripting (Second Edition) - Second Edition

By: Brenton J.W. Blawat

Overview of this book

PowerShell scripts offer a handy way to automate various chores. Working with these scripts effectively can be a difficult task. This comprehensive guide starts from scratch and covers advanced-level topics to make you a PowerShell expert. The first module, PowerShell Fundamentals, begins with new features, installing PowerShell on Linux, working with parameters and objects, and also how you can work with .NET classes from within PowerShell. In the next module, you’ll see how to efficiently manage large amounts of data and interact with other services using PowerShell. You’ll be able to make the most of PowerShell’s powerful automation feature, where you will have different methods to parse and manipulate data, regular expressions, and WMI. After automation, you will enter the Extending PowerShell module, which covers topics such as asynchronous processing and, creating modules. The final step is to secure your PowerShell, so you will land in the last module, Securing and Debugging PowerShell, which covers PowerShell execution policies, error handling techniques, and testing. By the end of the book, you will be an expert in using the PowerShell language.
Table of Contents (24 chapters)
Title Page
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Chapter 17. Error Handling

Errors are used to communicate unexpected conditions, an exceptional circumstance. Errors often contain useful information that can be used to diagnose a condition.

Handling errors is a critical part of working with the language, not least because PowerShell defines two different types of errors and several different ways to raise them.

As well as presenting different types of error, PowerShell has a number of different ways to handle errors, from ignoring errors to graceful handling.

During the course of this chapter, self-contained blocks of code are described as scripts. The terms function, script block, and script can be considered interchangeable in the context of error handling.

The following topics are covered in this chapter:

  • Error types
  • Error actions
  • Raising errors
  • Catching errors