Using session state in Web API

There were a few answers available on the web but none of them worked correctly for me in MVC 5. The one that did was found in the book ASP.NET Web API 2 Recipes: A Problem-Solution Approach.

Create two classes; SessionControllerHandler and SessionHttpControllerRouteHandler. Implement as follows:

public class SessionControllerHandler : HttpControllerHandler, IRequiresSessionState

{

    public SessionControllerHandler(RouteData routeData)

        : base(routeData)

    { }

}

 

public class SessionHttpControllerRouteHandler : HttpControllerRouteHandler

{

    protected override IHttpHandler GetHttpHandler(RequestContext requestContext)

    {

        return new SessionControllerHandler(requestContext.RouteData);

    }

}













In your WebApiConfig, add the following above your route declaration(s):







public static void Register(HttpConfiguration config)

{

    var httpControllerRouteHandler = typeof(HttpControllerRouteHandler).GetField("_instance",

        System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.NonPublic);

 

    if (httpControllerRouteHandler != null)

    {

        httpControllerRouteHandler.SetValue(null,

            new Lazy<HttpControllerRouteHandler>(() => new SessionHttpControllerRouteHandler(), true));

    }

 

    config.Routes.MapHttpRoute(

        name: "DefaultApi",

        routeTemplate: "api/{controller}/{action}/{id}",

        defaults: new { id = RouteParameter.Optional }

    );

}










You will now find that any functions accessed through a Web API action will have access to read and write to session. 







 HttpContext.Current.Session["User"]="Talukdar";




string user=HttpContext.Current.Session["User"].ToString();