Question

I have a problem with static variable. Part of the organization of my controllers is as follows:

namespace MyApp.Controllers
{
    public class DevicesController : Controller
    {            
        static int some_var = 0;           

        [AcceptVerbs(HttpVerbs.Post)]
        public ActionResult SetValue(int temp){
           some_var = temp;
           return RedirectToAction("DisplayValue");
        }

        [Authorize]
        public ActionResult DisplayValue(){              
          .... 
          return View(some_object);
        }
     }
}

The problem arises when multiple users simultaneously using this view. The same static variable is used by all users and change its value. How solve this?

Answer 1

You can use,

HttpContext.Current.Session["some_var"]

instead of some_var, this will help. This will preserve for the user that is logged, one session, and you can access it statically with HttpContext.Current

namespace MyApp.Controllers 
{ 
    public class DevicesController : Controller 
    { 

        [AcceptVerbs(HttpVerbs.Post)] 
        public ActionResult SetValue(int temp){ 
           HttpContext.Current.Session["some_var"] = temp; 
           return RedirectToAction("DisplayValue"); 
        } 

        [Authorize] 
        public ActionResult DisplayValue(){ 

          ....  
          return View((int)HttpContext.Current.Session["some_var"]); 
        } 
     } 
}