Скачать или смотреть How to Extract the Desired Payload from an API Response in C# and Blazor

Learn how to effectively get results from an API response using `HttpClient` in C# with Blazor, ensuring you deserialize the JSON data correctly to access the actual payload.
---
This video is based on the question https://stackoverflow.com/q/78026874/ asked by the user 'Spikee' ( https://stackoverflow.com/u/5159468/ ) and on the answer https://stackoverflow.com/a/78027040/ provided by the user 'Guru Stron' ( https://stackoverflow.com/u/2501279/ ) 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, comments, revision history etc. For example, the original title of the Question was: What's the best way to get result from ReadAsStringAsync response?

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.
---
Understanding API Responses in C# Blazor

When working with APIs in C# and Blazor, a common hurdle developers face is accurately extracting and deserializing the response content. In this post, we'll explore a specific situation where the result of an API call is not being deserialized correctly and how to address that.

The Problem: Receiving Unexpected API Response

Our scenario begins with a code snippet that sends a GET request to an API:

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

What Went Wrong?

The JSON response we receive looks like this:

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

When trying to deserialize responseBody into MyClass, we encountered the following output:

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

This indicates that the deserialization didn't happen as expected.

The Solution: Correctly Extracting the Payload

The culprit lies in the fact that the root JSON structure contains additional wrapping objects. To successfully retrieve the data we want, we must navigate through the response structure properly. Below, I'll explain the steps to resolve this issue.

Step 1: Modify the API Response Structure

The first step is to ensure that the API response doesn't wrap our payload unnecessarily. You should aim for your API to return IActionResult instead of Task<TResult>. This approach simplifies the response.

Step 2: Deserialize Using a Custom Container Class

If you need to keep the structure as it is, consider creating a container class for deserialization. Here’s an example:

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

Step 3: Use the Container to Deserialize

Next, utilize this container to get the actual payload:

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

Step 4: Testing and Validation

After applying these changes, test your code to ensure that the payload is not null, and that it contains the expected data. Make sure to also inspect the structure returned by your API for any further abnormalities.

Final Thoughts

By carefully analyzing the API response structure and using a custom container for deserialization, you can efficiently retrieve the data you need for your application. This technique can save you from common pitfalls and ensure your workflow remains efficient.

For anyone facing similar issues, make these adjustments, and you're likely to find the solution to your deserialization problems. Happy coding!