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How to Dynamically Parse JSON into Custom Classes in C#

Learn how to dynamically decide which custom class to use for parsing JSON in C-. Explore structured solutions to include different attributes depending on the JSON type. --- This video is based on the question https://stackoverflow.com/q/72046065/ asked by the user 'Pankaj' ( https://stackoverflow.com/u/547239/ ) and on the answer https://stackoverflow.com/a/72046242/ provided by the user 'StriplingWarrior' ( https://stackoverflow.com/u/120955/ ) 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: Decide Custom Class Dynamically to parse Json 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. --- Dynamically Parse JSON into Custom Classes in C- Parsing JSON can be a straightforward task when the structure is known and static. However, a common challenge arises when dealing with varying JSON structures. In this guide, we’ll explore how to dynamically choose the appropriate custom class to parse JSON objects in C-. We will specifically focus on a case where different JSON types require corresponding attributes to be handled correctly. Understanding the Problem Imagine you have to parse JSON files for different entities in your application, like Customer.json and Order.json. While both have similar base properties, each file has unique attributes that need to be accounted for during parsing. This dynamic requirement can complicate your design if not handled properly. Example JSON Structures Customer.json: Contains properties like CustomerAttributes alongside common properties. Order.json: Contains OrderAttributes in addition to the base properties. Given the objective, let's rework your parsing classes so you can effectively handle different attribute types based on the JSON being processed. The Solution: Dynamic Class Handling There are two primary approaches to dynamically determine which attributes to parse based on the JSON type: Option 1: Using Generics If your code can anticipate the expected type of JSON beforehand, generics can be a powerful solution. By using a generic placeholder for the attribute type, you can streamline your classes as follows: [[See Video to Reveal this Text or Code Snippet]] Benefits of Generics: Type Safety: You maintain strong typing, which reduces errors. Flexibility: Easily adapts to any type you may need to introduce in the future. Option 2: Using JObject for Late Binding If the JSON structure may vary more dynamically and you only know its type at runtime, consider using the JObject class provided by JSON parsing libraries like Newtonsoft.Json. This approach lets you handle unknown attribute types in a more flexible manner: [[See Video to Reveal this Text or Code Snippet]] Benefits of Using JObject: Dynamic: You can handle any structure without the need to predefine classes for every possible attribute set. Versatile: Allows you to access properties using JSON path selectors or LINQ queries. Conclusion Choosing the right approach to dynamically parse JSON in C- depends on your specific use case. If you can dictate the JSON types beforehand, generics offer a strong solution. In contrast, if you need flexibility for varying JSON structures, using JObject is a great alternative. By implementing either of these strategies, you will simplify your codebase and future-proof your application against evolving JSON structures. Now that you’re equipped with these methods, you can effectively parse diverse JSON files and enhance your application’s functionality.