How Can I Customize JSON Serialization in ASP.NET MVC to Use JSON.Net?

ASP.NET MVC's Default JSON Serialization: A Common Issue

Working with JSON in ASP.NET MVC often presents a challenge: the default serialization of enums. Instead of their string representations, enums are typically serialized as numerical values.

Understanding the Default Serializer in ASP.NET MVC 4

ASP.NET MVC 4 relies on JavaScriptSerializer as its default JSON serializer, unlike ASP.NET Web API, which utilizes JSON.Net. This difference means JSON.Net isn't automatically used in MVC 4.

Integrating JSON.Net for Serialization

To leverage JSON.Net's capabilities, you need to configure it as your application's default serializer. This involves creating a custom JSON.Net result type, such as JsonNetResult. Comprehensive instructions can be found in resources such as "ASP.NET MVC and Json.NET."

Customizing Controller Action Parameter Deserialization

For deserializing controller action parameters using JSON.Net, a custom ValueProviderFactory implementation is required. This allows JSON.Net to parse JSON parameters during model binding. Register your custom implementation via the ValueProviderFactories class.

Further Reading

For more detailed guidance on integrating JSON.Net into your ASP.NET MVC project, consult these resources:

• "Using JSON.NET as the default JSON serializer in ASP.NET MVC 3 - is it possible?"
• "ASP.NET MVC 3 – Improved JsonValueProviderFactory using Json.Net" (for parameter deserialization customization)

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