How Can I Customize Serialization and Deserialization in System.Text.Json using .NET 7's Contract Customization?

Implementing Contract Customization in System.Text.Json

In System.Text.Json;, contract customization, similar to the IContractResolver interface in Newtonsoft.Json, will be available in .NET 7. This allows for user-defined serialization and deserialization rules.

Introducing IJsonTypeInfoResolver

The IJsonTypeInfoResolver interface is central to contract customization. Implementations of this interface provide metadata for contract customization, modifying the default serialization behavior.

Using DefaultJsonTypeInfoResolver

The DefaultJsonTypeInfoResolver class provides a straightforward way to customize default serialization. It can be extended or modified to suit specific requirements.

Replacing SelectiveSerializer with Modifiers

To convert your SelectiveSerializer to a DefaultJsonTypeInfoResolver using modifiers, you can use the following approach:

1. Define fluent extension methods to simplify the modification process:

   // ... code to define SerializeSelectedFields extension methods ...

2. Set up your JsonSerializerOptions with the customized resolver:

   var options = new JsonSerializerOptions
   {
       TypeInfoResolver = new DefaultJsonTypeInfoResolver()
           .SerializeSelectedFields("FirstName,Email,Id"),
       // ... other options as required ...
   };

Notes:

• JsonPropertyInfo.ShouldSerialize can conditionally serialize properties.
• Ensure locale-invariant string comparisons for serialization metadata.
• By default, System.Text.Json; is case-sensitive, so consider case-sensitive name matching when customizing serialization.

The above is the detailed content of How Can I Customize Serialization and Deserialization in System.Text.Json using .NET 7's Contract Customization?. For more information, please follow other related articles on the PHP Chinese website!