How to Read JSON Values in ASP.NET Core Web API

Discover the best methods to extract values from `JSON` data in ASP.NET Core Web API, ensuring efficient data handling.
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How to Read JSON Values in ASP.NET Core Web API

Managing JSON data is an integral part of modern web APIs, especially when developing with ASP.NET Core. If you find yourself needing to extract values from JSON structures, like the one below, you’re in the right place!

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In this guide, we will explore two effective ways to read JSON values using ASP.NET Core. We’ll leverage both the built-in System.Text.Json library and the popular Newtonsoft.Json package. Let's break this down step by step.

Using System.Text.Json

The first method utilizes the System.Text.Json namespace, which is included with .NET Core and is designed for high-performance JSON processing.

Step 1: Define Your JSON Data

To begin, you’ll want to store your JSON string correctly in your code:

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Step 2: Deserialize the JSON

Next, you will need to convert the JSON string into a C# object. The process is called deserialization, and here’s how you can do it:

Import the System.Text.Json namespace.

Use JsonSerializer to deserialize your JSON into a defined class structure:

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Summary for System.Text.Json

Use System.Text.Json for built-in high-performance JSON handling.

Deserialize to custom classes that represent the JSON structure.

Easy data extraction through class properties.

Using Newtonsoft.Json

If you prefer more features or are already familiar with Newtonsoft.Json, you can install this package via NuGet and follow a similar approach.

Step 1: Install the Package

To get started with Newtonsoft.Json, you'll need to install it:

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Step 2: Define Your Classes

You can reuse the same class definitions shown previously:

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Step 3: Deserialize with Newtonsoft.Json

Now, you can deserialize the JSON string as follows:

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Summary for Newtonsoft.Json

Use Newtonsoft.Json for advanced features and flexibility.

Similar process of creating classes and deserializing data.

Conclusion

In this guide, we explored two powerful methods to read JSON values in ASP.NET Core Web API: using System.Text.Json and Newtonsoft.Json. Both approaches effectively allow you to extract data from JSON structures with ease.

Feel free to choose the method that best suits your project needs or preferences. Happy coding!