what is application variable? How do i declare Application variables in ASP.NET MVC?

Question

Where to declare(Application variable) and How to access application variable in controller ?
How to get model(model.tt file) value from database in application_start() ? i don't have any idea about application variable, So if you know anything about it then help me. Thanks..!

no , in this question there is no any answer like where to declare or how to access in controller. — Smit Kotadia, Apr 12 '18 at 05:18
Possible duplicate of [Does asp.net MVC have Application variables?](https://stackoverflow.com/questions/2266533/does-asp-net-mvc-have-application-variables) — Claies, Apr 12 '18 at 05:20
how could you suggest this isn't a duplicate? Is this not the exact answer you are looking for? https://stackoverflow.com/a/42222894/2495283 — Claies, Apr 12 '18 at 05:20
If it does not work please show us your code so we can see and verify it — dsdel, Apr 12 '18 at 05:30

score 0 · Accepted Answer · answered Apr 13 '18 at 07:16

In global.asax file first declare service in which you write linq syntax or your logic,

 private readonly ISystemConfigurationService _systemConfigurationService;

Then, create constructor

public MvcApplication()
    {
        _systemConfigurationService = new SystemConfigurationService();
    }

Get Model Data when app start

protected void Application_Start()
    {
        AreaRegistration.RegisterAllAreas();
        FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
        RouteConfig.RegisterRoutes(RouteTable.Routes);
        BundleConfig.RegisterBundles(BundleTable.Bundles);
        List<SystemConfigurationModel> systemConfigurationValue = General.MapList<System_Configuration , SystemConfigurationModel> (_systemConfigurationService.GetAllSystemConfigData());
        Application["SystemConfig"] = new List<SystemConfigurationModel>(systemConfigurationValue);
    }

In controller you have to do this,

List<SystemConfigurationModel> applicationState = HttpContext.Application["SystemConfig"] as List<SystemConfigurationModel>;
ViewBag.ContactEmail = applicationState.Find(x => x.Config_Key == "ContactMail").Value;

Then Pass it to view using view bag.

what is application variable? How do i declare Application variables in ASP.NET MVC?

1 Answers1