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Showing content from https://unosquare.github.io/embedio/api/EmbedIO.WebApi.IRequestDataAttribute-2.html below:

Interface IRequestDataAttribute<TController, TData>

Represents an attribute, applied to a parameter of a web API controller method, that causes the parameter to be passed deserialized data from a request.

The difference between this interface and INonNullRequestDataAttribute<TController, TData> is that attributes implementing this interface can retrieve null values.

Namespace: EmbedIO.WebApi Syntax

public interface IRequestDataAttribute<in TController, TData>
    where TController : WebApiController where TData : class

Type Parameters Name Description TController

The type of the controller.

TData

The type of the data.

Methods GetRequestDataAsync(TController, String)

Asynchronously obtains data from a controller's context.

Declaration

Task<TData> GetRequestDataAsync(TController controller, string parameterName)

Parameters Type Name Description TController controller

The controller.

String parameterName

The name of the parameter that has to receive the data.

Returns Type Description Task<TData>

a whose result will be the data to pass as a parameter to a controller method.