[FromForm], [FromQuery],[FromBody],[FromHeader],[FromQuery],[FromRoute]

Question

I am slowly learning the .Net Core. I caught my head thinking when to use [FromForm], [FromQuery],[FromBody],[FromHeader],[FromRoute] [FromService]. Could anyone please help me in understanding them because I am confused when to use which directive.

Answer 1

In simple words,

[FromQuery] is to get values from the query string
[FromRoute] is to get values from route data
[FromForm] is to get values from posted form fields
[FromBody] is to get values from the request body
[FromHeader] is to get values from HTTP headers
[FromService] will have value injected by the DI (Dependency Injection) resolver

These attributes tell the MVC model binder from where to read the values from when the controller action is called or invoked.

For more information on model binding and about the usage of the above attributes please refer the following MSDN link

MSDN Reference -> Model Binding in ASP.NET Core