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
Other Books You May Enjoy
25
Index

Types and type conversion

Type conversion in PowerShell is used to change between different types of values. Type names are written between square brackets. The type name must be a .NET type, such as a string, an integer (Int32), and a date (DateTime).

Types may be used to convert, coerce, or cast one type into another. For example, a DateTime object returned by Get-Date can be cast to a String:

PS> [String](Get-Date)
10/27/2016 13:14:32

Or a string may be changed into a DateTime object:

PS> [DateTime]"01/01/2016"
01 January 2016 00:00:00 

If the cast fails, an error will be displayed:

[DateTime]'30/30/2016'
InvalidArgument: Cannot convert value "30/30/2016" to type "System.DateTime". Error: "String '30/30/2016' was not recognized as a valid DateTime."

The -as operator can be used to cast types as well:

'01/01/2016' -as [DateTime]

If the cast fails when using -as, no...