Book Image

Mastering PowerShell Scripting - Fourth Edition

By : Chris Dent
5 (1)
Book Image

Mastering PowerShell Scripting - Fourth Edition

5 (1)
By: Chris Dent

Overview of this book

PowerShell scripts offer a convenient way to automate various tasks, but working with them can be daunting. Mastering PowerShell Scripting takes away the fear and helps you navigate through PowerShell's capabilities.This extensively revised edition includes new chapters on debugging and troubleshooting and creating GUIs (online chapter). Learn the new features of PowerShell 7.1 by working with parameters, objects, and .NET classes from within PowerShell 7.1. This comprehensive guide starts with the basics before moving on to advanced topics, including asynchronous processing, desired state configuration, using more complex scripts and filters, debugging issues, and error-handling techniques. Explore how to efficiently manage substantial amounts of data and interact with other services using PowerShell 7.1. This book will help you to make the most of PowerShell's automation features, using different methods to parse data, manipulate regular expressions, and work with Windows Management Instrumentation (WMI).
Table of Contents (26 chapters)
24
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25
Index

Summary

Error handling in PowerShell is a complex topic, perhaps made more so by inconsistencies in the documentation that can trip up new and experienced PowerShell users.

PowerShell includes the concept of non-terminating errors. Non-terminating errors allow a script, such as one acting on a pipeline, to carry on in the event of an error.

Error handling cannot be said to be consistently implemented in PowerShell. It is not always true that a problem that prevents an action from continuing will be described as a terminating error. The reverse is also true: not all actions that allow an action to continue are described as non-terminating errors. Great care must therefore be taken when writing code to correctly handle error conditions.

Non-terminating errors should be used when writing commands that expect to act on more than one object if the error is restricted to that one object and does not prevent a broader activity from completing.

You use terminating...