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Скачать или смотреть Getting HTTP Return Code in Angular 9 with .NET Core 5.0

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  • 2025-10-11
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Getting HTTP Return Code in Angular 9 with .NET Core 5.0
.NET Core 5.0 - Angular 9 - how to get HTTP return code while maintaining MVC/json mapping?angularasp.net coremodel view controller
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Описание к видео Getting HTTP Return Code in Angular 9 with .NET Core 5.0

Learn how to retrieve the `HTTP return code` when making API requests in Angular 9, while integrating with .NET Core 5.0. This blog provides solutions for common compilation issues and best practices for managing responses.
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This video is based on the question https://stackoverflow.com/q/68725938/ asked by the user 'phil123456' ( https://stackoverflow.com/u/14027870/ ) and on the answer https://stackoverflow.com/a/68726129/ provided by the user 'Michael D' ( https://stackoverflow.com/u/6513921/ ) 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: .NET Core 5.0 - Angular 9 - how to get HTTP return code while maintaining MVC/json mapping?

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.
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How to Retrieve HTTP Return Codes in Angular 9 with .NET Core 5.0

When developing applications with Angular 9 and .NET Core 5.0, developers often face the challenge of handling HTTP responses effectively. A common scenario is needing to retrieve the HTTP return code while maintaining MVC and JSON mapping. This blog will guide you through the process and help you avoid common compilation pitfalls.

Problem Overview

Imagine you're working on an Angular application that makes API requests to a .NET Core backend. You want to monitor the HTTP return codes to handle various situations, such as success or error responses. Recently, someone encountered an issue when trying to observe HTTP responses, specifically when adding {observe: "response"} to their request. This change led to a compilation error stating "No overload matches this call."

Here's a snippet of the original code:

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

Understanding the Compilation Error

The error comes from the type assertion combined with the {observe: "response"} option. By default, when you request the full response, the return type changes.

To resolve this, you'll need to use the map and catchError operators from RxJS for managing and mapping the response properly.

Step-by-Step Solution

1. Import Required RxJS Operators

First, ensure you import map and catchError from rxjs/operators in your Angular service file:

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

2. Refactoring the HTTP Call

You'll need to revise your original method to handle the response effectively. Here’s how you can do it:

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

3. Explanation of the Changes

Observing Full Response: By using { observe: "response" }, you can handle the complete HTTP response, which includes headers and status code.

Mapping the Response: The map operator is used to extract the relevant portion of the response. When you specify observe: "response", the response itself is wrapped in a Response object, and you typically want to access the body, which contains your actual data.

Error Handling: The catchError operator allows you to manage errors that arise during the HTTP call efficiently. When an error occurs, it logs the error and rethrows it for further handling.

Conclusion

By following the steps outlined above, you can successfully retrieve HTTP return codes in your Angular application while maintaining compatibility with your .NET Core 5.0 API. Handling responses properly ensures smoother user experiences and enables meaningful error management. With these adjustments, you'll be better equipped to debug and manage API interactions within your application.

Incorporate these practices into your development process to enhance your application's performance and reliability.

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