ASP.NET Web API–Extract header data

I was looking for a way to get the header from a Web API request. After trying multiple things I ended up with creating my own model binder:

	public class OrdersController : ApiController
	{
	public async Task<IList<Order>> GetOrders([FromHeader("X-Correlation-ID")] Guid correlationId)
	{
	//Removed other code
	}
	}

view raw ApiController.cs hosted with ❤ by GitHub

	public class FromHeaderAttribute : ParameterBindingAttribute
	{
	private string name;
	public FromHeaderAttribute(string headerName)
	{
	this.name = headerName;
	}
	public override HttpParameterBinding GetBinding(HttpParameterDescriptor parameter)
	{
	return new FromHeaderBinding(parameter, this.name);
	}
	}

view raw FromHeaderAttribute.cs hosted with ❤ by GitHub

	public class FromHeaderBinding : HttpParameterBinding
	{
	private readonly string _name;
	public FromHeaderBinding(HttpParameterDescriptor parameter, string headerName)
	: base(parameter)
	{
	if (string.IsNullOrEmpty(headerName)) throw new ArgumentNullException("headerName");
	_name = headerName;
	}
	public override Task ExecuteBindingAsync(ModelMetadataProvider metadataProvider, HttpActionContext actionContext, CancellationToken cancellationToken)
	{
	IEnumerable<string> values;
	if (actionContext.Request.Headers.TryGetValues(_name, out values))
	{
	var tempVal = values.FirstOrDefault();
	if (tempVal != null)
	{
	var actionValue = Convert.ChangeType(tempVal, Descriptor.ParameterType);
	actionContext.ActionArguments[Descriptor.ParameterName] = actionValue;
	}
	}
	var taskSource = new TaskCompletionSource<object>();
	taskSource.SetResult(null);
	return taskSource.Task;
	}
	}

view raw FromHeaderBinding.cs hosted with ❤ by GitHub