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Learn how to effectively parse and iterate through a JSON file in PowerShell using a simple foreach loop. Step-by-step instructions included!
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This video is based on the question https://stackoverflow.com/q/74563281/ asked by the user 'Sourav Karmakar' ( https://stackoverflow.com/u/11308857/ ) and on the answer https://stackoverflow.com/a/74563495/ provided by the user 'TZHX' ( https://stackoverflow.com/u/519348/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Parse JSON in PowerShell: A Simple Guide for Iteration

If you're a PowerShell user dealing with JSON data, you might find yourself needing to parse JSON files frequently. JSON (JavaScript Object Notation) is a lightweight data interchange format that is easy for humans to read and write, and easy for machines to parse and generate. Today, we're going to address a common scenario: how to iterate through each item in a JSON file using a foreach loop in PowerShell.

Understanding the Problem

Let’s say you have a JSON file that contains multiple nested items, and you want to extract information from each of them. For instance, here’s a sample JSON content:

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Given this structure, you want to loop through each item and retrieve the name, isSecret status, and value. Let's dive into the solution.

Steps to Parse and Iterate Through JSON in PowerShell

Step 1: Load the JSON Data

First, you need to read your JSON content into a variable. You can define your JSON content as a string in PowerShell.

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Step 2: Convert JSON String to PowerShell Object

Next, utilize ConvertFrom-Json to parse the JSON string into a PowerShell object that you can easily work with.

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Iterate Through the JSON Properties

Now that you have a PowerShell object, you can use a foreach loop to iterate through its properties. Each property will give you access to its Name and nested Value.

[[See Video to Reveal this Text or Code Snippet]]

Output Explanation

When you run the above script, you’ll see the output corresponding to each item in the JSON:

[[See Video to Reveal this Text or Code Snippet]]

In this example, since all isSecret values are null, they don’t display any content, but you can still retrieve the value associated with each key.

Conclusion

Parsing and iterating through JSON files in PowerShell isn't as daunting as it seems. By following these simple steps, you can quickly extract and manipulate JSON data to fit your needs. Whether you're working with configuration files, APIs, or any other structured data, knowing how to handle JSON in PowerShell is a valuable skill. Happy scripting!