问题
I've just declared a constant for the "application/json" content type in one of my classes.
public const string JsonContentType = "application/json";
I'm not sure it is a good practice.
Does .NET framework have a predefined const for "application/json"?
回答1:
While there are some MIME constants defined in MediaTypeNames (see here), there no constant for "application/json".
Putting additional content types in a shared const is probably best practice, better than defining them in string literals a million times throughout your code at least.
Plus it gives you the flexibility of using new/custom MIME types, which a specific .NET version might not have.
回答2:
In order to add an up-to-date answer: since dotnet core 2.1 MediaTypeNames.Application.Json has been defined.
See https://github.com/dotnet/corefx/pull/26701 for the changeset.
来源：https://stackoverflow.com/questions/20655938/application-json-constant-in-net-framework