Session Variables in ASP.NET Core 1.0

Question

I'm trying to do something simple in an ASP.NET Core 1.0 / ASP.net Core Mvc project: get and set simple session variables. But it has proven very difficult. I tried following the advice in this answer, which is to add the dependency -- "Microsoft.AspNet.Session": "1.0.0-beta3" -- to project.json, and then use Context.Session.SetInt("myVar", 35), but that did not work. The SetInt() method is still not recognized.

Do I need to include another dependency? What am I missing?

is there a particular reason you need session variables? Personally it was the first thing I used to turn off on the old templates, only turning them on when I had exhausted all other possible ways of not using them as sessions variables are a scalability and performance bottleneck. — BMac
– BMac, Commented Apr 6, 2015 at 14:09
I'm conditionally setting the Layout variable in _ViewStart.cshtml to allow our developers to set a "?dev=1" query string to develop in a new layout that we don't want to propagate globally yet. Right now that works and they can go to "some/page?dev=1" to see the page they're developing on in the new template. I want this choice to hold through the session, so they can navigate through the site and keep that new layout. — jbyrd
– jbyrd, Commented Apr 6, 2015 at 14:14
Have you added using Microsoft.AspNet.Http; to your controller file? — Mike Brind
– Mike Brind, Commented Apr 7, 2015 at 12:20
just tried myself and after adding the dependency on project json and the using as @MikeBrind suggested I have the session working ok. — Bart Calixto
– Bart Calixto, Commented Apr 7, 2015 at 18:38
I've blogged about how to use Session in ASP.NET5 if it helps: mikesdotnetting.com/article/270/sessions-in-asp-net-5 — Mike Brind
– Mike Brind, Commented Apr 7, 2015 at 20:23

Malgaur · Accepted Answer · 2015-04-07 19:53:38Z

1

Try following this sample: https://github.com/aspnet/Session/blob/dev/samples/SessionSample/Startup.cs

You will need to configure the session middleware first, then include the appropriate usings.

public class Startup
{
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddCaching();
        services.AddSession();
    }

    public void Configure(IApplicationBuilder app)
    {
        app.UseSession(o => {
            o.IdleTimeout = TimeSpan.FromSeconds(30); });
    }
}

The relevant usings are

using Microsoft.AspNet.Builder;
using Microsoft.AspNet.Http;

answered Apr 7, 2015 at 19:53

Malgaur

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