Скачать или смотреть How to Implement a PowerShell Progress Bar in Runspace for GUI Applications

Learn how to integrate a `PowerShell progress bar` within a runspace to visually track the progress of file operations in your GUI application.
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This video is based on the question https://stackoverflow.com/q/65541355/ asked by the user 'Oscar Loret' ( https://stackoverflow.com/u/14114796/ ) and on the answer https://stackoverflow.com/a/65545643/ provided by the user 'Smorkster' ( https://stackoverflow.com/u/4066646/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Implementing a PowerShell Progress Bar in Runspace for GUI Applications

Creating GUI applications in PowerShell can significantly enhance user interaction, especially when it comes to file operations like copying user profiles. However, adding visual feedback, such as a progress bar, can be a challenge. In this guide, we’ll explore how to implement a PowerShell progress bar within a runspace to ensure users stay informed about the execution process. We'll break this down step by step, addressing common hurdles and their solutions.

The Problem

Suppose you're building a PowerShell script with a GUI that allows users to copy user profiles from one disk to another. You’ve already built the basic GUI using XAML, and your copy function executes correctly within a runspace. However, you want to implement a progress bar to reflect the progress of folder copying in real time, but you're unsure how to do so effectively.

Let's take a closer look at the script you have and identify how to modify it to support a progress bar.

Understanding the Runspace

Your current runspace setup looks like this:

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Adding a Progress Bar

To incorporate a progress bar, follow these steps:

Step 1: Modify Loop to Track Progress

Introduce a counter to keep track of the current folder index during the copying process. This will help you calculate the progress percentage effectively.

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Step 2: Invoke the Dispatcher

Utilize the Dispatcher to safely update the progress bar from within the runspace context. This will ensure your GUI remains responsive while updates are made.

Example Code Snippet for Progress Update:

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Implementing the Changes in Your Event Handler

Ensure that your event-handler is set up correctly to initiate the copy process with the progress bar:

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Conclusion

Implementing a PowerShell progress bar within a runspace enhances the user experience by providing real-time feedback during lengthy file operations. By tracking the progress of the copy operation and updating the GUI accordingly, users can be assured that the process is ongoing and receive visual confirmation upon completion.

Following the steps outlined above should aid you in successfully integrating a progress bar into your PowerShell script with a GUI. Happy scripting!