Access HttpContext Session and Configuration in helper class in Asp.Net Core 3.1

In this article we will cover how to Access HttpContext Session and Configuration in helper class in Asp.Net Core 3.1 Application.

Let's Start:

Helper Class

public class DemoClass
{
    private readonly IHttpContextAccessor _httpContext;
    protected readonly ISession _session;
    private readonly IConfiguration _configuration;
 
    public DemoClass(IHttpContextAccessor httpContextAccessor, IConfiguration configuration)
    {
        _httpContext = httpContextAccessor;
        _session = _httpContext.HttpContext.Session;
        _configuration = configuration;
    }
 
    public void Get_Data()
    {
        string uName = _session.GetString("uName");
        string dbConnection = _configuration.GetValue<string>("dbConnection");
    }
}

Example 1

Register Helper class in "ConfigureServices" method of Startup.cs

public void ConfigureServices(IServiceCollection services)
{
    services.AddSession(options =>
    {
        options.Cookie.HttpOnly = true;
    });
 
    services.AddHttpContextAccessor();
    services.AddControllersWithViews();
 
    //Register Helper Class
    services.AddSingleton<DemoClass>();
}

public class Example1Controller : Controller
{
    private readonly DemoClass demo;
 
    public Example1Controller(DemoClass _demo)
    {
        demo = _demo;
    }
    public IActionResult Index()
    {
        demo.Get_Data();
        return View();
    }
}

Example 2

public class Example2Controller : Controller
{
    private readonly IHttpContextAccessor _httpContext;
    private readonly IConfiguration _configuration;
 
    public Example2Controller(IHttpContextAccessor httpContextAccessor, IConfiguration configuration)
    {
        _httpContext = httpContextAccessor;
        _configuration = configuration;
    }
    public IActionResult Index()
    {
        DemoClass demo = new DemoClass(_httpContext, _configuration);
        demo.Get_Data();
        return View();
    }
}

Note:

1) Implement Example 1 if your helper class is used in multiple Controllers.

2) Implement Example 2 if your helper class is used in some Controllers.