AspNet Core 2 No service for HttpContext sessions issue

Question

Error:

AspNet Core 2 No service for type 'Microsoft.AspNetCore.Http.HttpContext'

 

im using https://docs.microsoft.com/en-us/aspnet/core/fundamentals/app-state?view=aspnetcore-2.1&tabs=aspnetcore2x as guide, but seems to be not enough.

 

in Startup.cs

public void ConfigureServices(IServiceCollection services)
{
services.AddDistributedMemoryCache();
services.AddMvc().AddSessionStateTempDataProvider();
services.AddSession(options =>
{
// Set a short timeout for easy testing.
options.IdleTimeout = TimeSpan.FromMinutes(1);
options.Cookie.HttpOnly = true;
});//<<==
}
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
app.UseBrowserLink();
}
else
{
app.UseExceptionHandler("/Home/Error");
}
app.UseStaticFiles();
app.UseSession();//<<==
app.UseMvc(routes =>
{
routes.MapRoute(
name: "default",
template: "{controller=Home}/{action=Index}/{id?}");
routes.MapSpaFallbackRoute(
name: "spa-fallback",
defaults: new { controller = "Home", action = "Index" });
});
}

in home controller:

using Microsoft.AspNetCore.Http;
HttpContext.Session.SetString("TestName", user.UserName);
HttpContext.Session.SetString("TestVal", user.testVal.ToString());

to this point it seems to be working, im able to navigate through different pages and i can use/check sessions in controller side.

 

But the problem is when im trying to use sessions in any view

 

View side:

@using Microsoft.AspNetCore.Http
@inject HttpContext HttpContext
@if (@HttpContext.Session.GetString("testVal").Equals("True"))
{
<td><input type="checkbox"></td>
}
else
{
<td><input type="checkbox" readonly></td>
}

when i try to get or set sessions cshtml/view side i get the error

 

can you please help?