ASP.Net Core7 : Set Global Static Variable For Application Life

public class UserService
{
public int UserId { get; set; }
}

builder.Services.AddSingleton();

public IActionResult Login(string username, string password)
{
// Authenticate the user and get their ID
int userId = …

// Set the UserId in the UserService class
var userService = HttpContext.RequestServices.GetService();
userService.UserId = userId;

return RedirectToAction(“Index”, “Home”);
}

In Controller

public IActionResult Index()
{
var userService = HttpContext.RequestServices.GetService();
var userId = userService?.UserId ?? 0;
ViewData[“userId”] = userId;
return View();
}

public async Task Logout()
{
await HttpContext.SignOutAsync();
var userService = HttpContext.RequestServices.GetService();
if (userService != null)
{
userService.UserId = 0;
}
return RedirectToAction(“Index”, “Hukam”);
}

In View
@using EkHukam_Gurudwara.Data

@{
ViewData[“Title”] = “Dashboard”;

var userService = (UserService)ViewContext.HttpContext.RequestServices.GetService(typeof(UserService));

var @UID = (userService?.UserId ?? 0);
}