Скачать или смотреть How to Refresh a ViewComponent with Ajax in ASP.NET Core 3.1

Discover how to effectively refresh a ViewComponent using Ajax in ASP.NET Core 3.1 with this step-by-step guide. Perfect for updating user interfaces dynamically!
---
This video is based on the question https://stackoverflow.com/q/68948303/ asked by the user 'sunboy_sunboy' ( https://stackoverflow.com/u/15679873/ ) and on the answer https://stackoverflow.com/a/68949063/ provided by the user 'sunboy_sunboy' ( https://stackoverflow.com/u/15679873/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: How to refresh or reload a ViewComponent with Ajax in Asp.net Core 3.1?

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Refresh a ViewComponent with Ajax in ASP.NET Core 3.1

Are you looking for an efficient way to refresh a ViewComponent dynamically when a user interacts with your web application? If so, you are in the right place! This guide will guide you through the process of reloading a ViewComponent using Ajax in ASP.NET Core 3.1. We'll break down the code into clear sections to ensure you understand how to implement this functionality successfully.

Problem Statement

Imagine you have a component displaying a list of favorite items, and you want this list to update smoothly whenever a user adds or removes an item. Instead of a full-page reload, you'd prefer a seamless update using Ajax. Let's go step by step on how to achieve this functionality with a FavoriteComponent in your application.

HTML Structure

Before diving into the code, here's a simplified view of the HTML you'll be working with. This is a small snippet of your main view:

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

This structure contains:

A div element where the FavoriteComponent will be displayed

An anchor tag that triggers the addition of a favorite item

The JavaScript Part

Now, let’s move on to the JavaScript section using jQuery. To add functionality when the anchor tag is clicked, follow this code snippet:

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

Explanation of the JavaScript Code

AJAX Request: The JavaScript code sends a POST request to the AddFavorite action method whenever the anchor tag is clicked.

The url is generated using the @ Url.Action helper, which links to the correct action in your controller.

The data property contains the ID of the product you want to favorite.

Handling the Response: Upon success, it checks if the status is 'added'.

If it is, the component re-loads the contents of the # favarite-user div using jQuery's load method, which effectively updates the component without a full page reload.

The Controller Logic

On the server-side, you need to have an action method that processes the incoming request. Here’s how it looks:

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

Breakdown of the Controller Action

Functionality: The AddFavorite method receives the product ID and checks if the item was successfully added to the user's favorites.

Response: Depending on the outcome, it returns a JSON response containing a status. This status informs the front-end script whether the item was added or removed.

Conclusion

By following the above steps, you can seamlessly refresh your ViewComponent using Ajax in ASP.NET Core 3.1. This approach enhances user experience by providing instant feedback on actions such as adding or removing items without the need for a page refresh.

If you have further questions or need assistance with more advanced implementations, feel free to reach out in the comments! Happy coding!