Add a custom response header in ApiController

Question

Until now, I had a GET method that looked like the following:

protected override async Task GetAll(QueryData query)
{
              


        

Answer 1

I have entered comments, here is my complete answer.

You will need to create a custom filter and apply that to your controller .

public class CustomHeaderFilter : ActionFilterAttribute
{
    public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
    {
       var count = actionExecutedContext.Request.Properties["Count"];
       actionExecutedContext.Response.Content.Headers.Add("totalHeader", count);
    }
}

In your Controller

  public class AddressController : ApiController
        {
            public async Task
 Get()
            {
               Request.Properties["Count"] = "123";
            }
    }