Explain JSON and how to add JSON Patch To Your ASP.Net Core Project

 JSON

• The new built-in JSON support, System.Text.Json, is high-performance, low allocation, and based on Span<byte>.

• The System.Text.Json namespace provides high-performance, low allocating, and standards-compliant capabilities to process JavaScript Object Notation (JSON), which includes serializing objects to JSON text and deserializing JSON text to objects, with UTF-8 support built-in. 

• It also provides types to read and write JSON text encoded as UTF-8, and to create an in-memory document object model (DOM) for random access of the JSON elements within a structured view of the data.

 Adding JSON Patch To Your ASP.Net Core Project

• Run Package Manager and install JSON Patch Library with the command:

Install-package Microsoft.AspNetCore. JsonPatch Write in your controller public class Person

[ (public string FirstName (get; set;)

 public string LastName (get;set;)) ]

[Route ("api/ [controller]")] 

public class PersonController: Controller (

private readonly Person _default Person =newPerson

FirstName="Jim",

LastName="Smith"

 };

[HttpPatch ("update") ]

public Person Patch ( [FromBody] JsonPatchDocument<Person> personPatch) {

personPatch.ApplyTo(_defaultPerson);

return defaultPerson;

}

}

• In the above example, we are just using a simple object stored on the controller and updating that, but in a real API, we will be pulling the data from a data source, applying the patch, then saving it back. 

• When we call this endpoint with the following payload:

[{"op":"replace", "path": "FirstName", "value": "Bob"}]

• We get the response of :

{"firstName": "Bob", "lastName": "Smith"}

first name got changed to Bob!