webapi中使用session

野性酷女 2022-07-14 09:09 268阅读 0赞

webapi中使用session
    
    修改global.cs里面的内容
    using System;
    using System.Web;
    using System.Web.Routing;
    using System.Web.Http;
    using System.Web.Http.WebHost;
    using System.Web.SessionState;
    
    namespace ApiControllerExample
    {
        public class Global : System.Web.HttpApplication
        {
    
            public override void Init()
            {
            //取下注释下面这行语句，将使得全部Api都可以访问Session
                //this.PostAuthenticateRequest += (s, e) => HttpContext.Current.SetSessionStateBehavior(SessionStateBehavior.Required);
                base.Init();
            }
    
            protected void Application_Start(object sender, EventArgs e)
            {
                RouteConfig.RegisterRoutes(RouteTable.Routes);  // 注册路由
            }
        }
    
        public class SessionableControllerHandler : HttpControllerHandler, IRequiresSessionState
        {
            public SessionableControllerHandler(RouteData routeData) : base(routeData) { }
        }
    
        public class SessionStateRouteHandler : IRouteHandler
        {
            IHttpHandler IRouteHandler.GetHttpHandler(RequestContext requestContext)
            {
                return new SessionableControllerHandler(requestContext.RouteData);
            }
        }
    
        public class RouteConfig
        {
            public static void RegisterRoutes(RouteCollection routes)
            {
                routes.MapHttpRoute(
                    name: "WebApiRoute1",
                    routeTemplate: "api/{controller}/{id}",
                    defaults: new { id = RouteParameter.Optional }
                ).RouteHandler = new SessionStateRouteHandler();  // 使用Session
    
    
                routes.MapHttpRoute(
                  name: "WebApiRoute2",
                  routeTemplate: "api/{controller}/{id}/{id2}",
                  defaults: new{id = RouteParameter.Optional }
              );  // 不使用Session
            }
        }
    }
    
    
    webapi用例：
    using System;
    using System.Web.Http;
    
    namespace ApiControllerExample
    {
        public class StateController : ApiController
        {
            public string Get(int id)
            {
                try
                {
                    return  GetStateInfo(id);
                }
                catch (Exception err)
                {
                    return "excep: " + err.Message;
                }
            }
    
            private string GetStateInfo(int id)
            {
                System.Web.HttpContext context = System.Web.HttpContext.Current;
    
                if (id == 1)
                {
                    return context.Session["state"].ToString();
                }
                else if (id == 2)
                {
                    return context.Cache["state"].ToString();
                }
                else
                {
                    return context.Application["state"].ToString();
                }
            }
    
        //这个方法无法使用Session
            public string Get(int id, int id2)
            {
                System.Web.HttpContext context = System.Web.HttpContext.Current;
    
                try
                {
                    return context.Session["state"].ToString();
                }
                catch (Exception err)
                {
                    return "excep: " + err.Message;
                }
            }
        }
    }