Web API 开启Session的配置

• Web API本身是默认没有开启Session配置的
  
• 建立SessionRouteHandler.cs和SessionControllerRouteHandler.cs并覆写类HttpControllerHandler、IRequiresSessionState、HttpControllerRouteHandler

public class SessionRouteHandler: HttpControllerHandler, IRequiresSessionState{
    public SessionRouteHandler(RouteData routeData) : base(routeData){ }
}
public class SessionControllerRouteHandler: HttpControllerRouteHandler{
    protected override IHttpHandler GetHttpHandler(RequestContext requestContext){
        return new SessionRouteHandler(requestContext.RouteData);
    }
} 

• 在WebApiConfig.cs中将config.Routes.MapHttpRoute 改成RouteTable.Routes.MapHttpRoute(using System.Web.Routing)并指定RouteHandler

RouteTable.Routes.MapHttpRoute(
    name: "ActionApi",
    routeTemplate: "actionapi/{controller}/{action}/{id}",
    defaults: new { id = RouteParameter.Optional }).RouteHandler = new SessionControllerRouteHandler();