Скачать или смотреть How to Loop Through Directories with PowerShell to Grab Text Files

Discover a step-by-step guide on how to effectively loop through directories in PowerShell, extract text files, and utilize them in your functions.
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This video is based on the question https://stackoverflow.com/q/71059461/ asked by the user 'gspecht' ( https://stackoverflow.com/u/6395801/ ) and on the answer https://stackoverflow.com/a/71061841/ provided by the user 'Bernard Moeskops' ( https://stackoverflow.com/u/9304296/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Mastering Directory Loops in PowerShell

PowerShell is an incredibly powerful tool for automating tasks on Windows. One common requirement is to loop through directories and extract specific files. In this post, we'll tackle a scenario where you need to navigate through multiple directories to grab text files located within a subfolder named "TSO."

The Challenge

You have a main folder called TestCircuits, which contains several subfolders. Each of these subfolders has another subfolder, TSO, which holds text files. Your goal is to loop through each subfolder, grab the most recently modified text file from each TSO directory, and then utilize these files in two functions, Extractor and VisioMaker.

Here’s the folder structure for clarity:

Main Folder: TestCircuits

Folder1

TSO

Name1.txt

Folder2

TSO

Name2.txt

Folder3

TSO

Name3.txt

The Solution

Let's break down how you can achieve this using PowerShell.

Step 1: Set the Location

First, you need to navigate to your TestCircuits directory. You can do this using the Set-Location cmdlet.

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Step 2: Retrieve TSO Folders

Utilize Get-ChildItem to retrieve all folders named TSO recursively. This allows you to find every instance of the TSO directory, no matter how deep they are nested.

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Step 3: Loop Through Each TSO Folder

Now that you have all the TSO folders, you need to use a loop to process each one. For each folder, retrieve the most recently modified text file.

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Step 4: Process the Text Files

Next, read the contents of the text file to prepare for your custom functions, Extractor and VisioMaker.

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Step 5: Define and Call Functions

Define your Extractor and VisioMaker functions. Instead of using global variables, pass the necessary data as parameters.

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Finally, call these functions with the file data you extracted:

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Full Script Example

Here’s how the complete script looks, consolidating all of the above steps:

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Conclusion

Looping through directories in PowerShell to process text files can greatly streamline your workflow. By understanding how to navigate directory structures and effectively call functions, you'll be able to manipulate files with ease. If you have further questions or need more examples, feel free to ask in the comments!