Скачать или смотреть How to Serialize a Nested JSON Object with Utf8JsonWriter in C-

Learn how to properly serialize complex objects as nested JSON using `Utf8JsonWriter` in C-. This guide breaks down the steps clearly to prevent common issues like escaped quotes.
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Understanding JSON Serialization in C-

Handling JSON data in C- is an essential skill, especially when developing applications that communicate with different APIs or handle complex data structures. One common task you might encounter is serializing a nested JSON object using Utf8JsonWriter. In this guide, we'll walk you through the problem of serializing complex objects and show you a straightforward solution to avoid common pitfalls, such as escaped quotes in the output.

The Problem: Nested JSON Serialization

Imagine you're working on a method that needs to serialize a C- object called Foo into JSON. This object contains not just simple fields, but also nested complex objects. The challenge typically arises when you want to serialize these nested fields directly into your JSON output. Instead of getting a nested JSON structure, you might end up with improperly escaped characters that can lead to confusion in your application.

Here's an excerpt of the code that illustrates this problem:

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

In the code above, you may find that the serialized output for the nested object appears as escaped strings, such as \u0022. This is not the desired structure we want in our JSON output.

The Solution: Correctly Serializing Nested Objects

After digging into the problem, a simple solution emerges. Instead of serializing the nested object into a string before writing it to the JSON, we can write it directly using the JsonSerializer. Here's the correct approach to serialize the nested object without causing issues with escaped quotes:

Step-by-Step Breakdown

Start by Writing the Parent Object:
Begin with writing your main object using writer.WriteStartObject() and add any simple fields you have.

Use WritePropertyName for Nested Objects:
Instead of serializing the field as a string, we’ll write the name of the property first:

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

Serialize the Nested Object Directly:
Finally, call JsonSerializer.Serialize and pass the writer along with the object to serialize:

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

Putting it all together, your updated serialization function will look like this:

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

Expected Output

With this method, your nested JSON object should now serialize correctly without escaped quotes, reflecting a clean nested structure. The output would be similar to:

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

Conclusion

Serializing nested JSON objects in C- doesn't have to be a complex task, provided you utilize the right approach. By writing property names correctly and directly streaming your nested objects into the Utf8JsonWriter, you can generate clean and well-structured JSON output without unwanted format issues. Whether you're new to JSON serialization or looking to refine your existing code, applying these best practices will ensure a smoother development experience.

Feel free to share your own experiences and solutions in the comments below!