Populate a model and access it anywhere on the app - asp.net-mvc

Question

I'm fairly new to razor pages Asp.Net MVC Razor pages,
I created a model with the user fields and wanted to fill it with data once i logged in and access that same data in other pages by calling on the model instead of making another db call
This is my code currently
Model:
public class Utilizador
{
[Key]
public int id { get; set; }
[Required, MaxLength(100)]
public string username { get; set; }
[Required, MaxLength(100)]
public string email { get; set; }
[Required, MaxLength(100)]
public string password { get; set; }
}
then i added a sigleton to Program.cs
builder.Services.AddSingleton<Utilizador>();

Answer 1

You can store your data in the Session or Cache during the first login verification, and then you can call the data directly from the Session without calling the database again.
My test code:
Utilizador.cs:
public class Utilizador
{
public int id { get; set; }
public string username { get; set; }
public string test { get; set; }
}
Startup.cs:
public void ConfigureServices(IServiceCollection services)
{
services.AddRazorPages();
services.AddScoped<Utilizador>();
services.AddSession();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
// other middleware
app.UseSession();
// other middleware
}
Test1.cshtml.cs:
public class Test1Model : PageModel
{
private readonly Utilizador _Utilizador;
private Utilizador model { get; set; }
public Utilizador getValue { get; set; }
public Test1Model(Utilizador Utilizador)
{
_Utilizador=Utilizador;
}
public async Task<IActionResult> OnGetAsync(int id)
{
if (id == 1)
{
_Utilizador.username = "MyTest";
_Utilizador.test = "Success";
}
else
{
_Utilizador.username = "MyTest";
_Utilizador.test = "Fail";
}
model = _Utilizador;
HttpContext.Session.Set<Utilizador>(id.ToString(),model);
getValue=HttpContext.Session.Get<Utilizador>(id.ToString());
return Page();
}
}
Get data directly from the corresponding page:
Test1.cshtml:
#page
#model CacheTest.Pages.TestPage.Test1Model
<div>#Model.getValue.username</div>
<div>#Model.getValue.test</div>
Test2.cshtml.cs:
public class Test2Model : PageModel
{
public Utilizador getValue { get; set; }
public void OnGet(int id)
{
getValue = HttpContext.Session.Get<Utilizador>(id.ToString());
}
}
Test2.cshtml:
#page
#model CacheTest.Pages.TestPage.Test2Model
<div>#Model.getValue.username</div>
<div>#Model.getValue.test</div>
Test Result
In Test1, store first and then read:
Directly read the data stored in the session in Test2:

Answer 2

You could try with EF Core,the official document:
https://learn.microsoft.com/en-us/aspnet/core/tutorials/razor-pages/page?view=aspnetcore-6.0&tabs=visual-studio
https://learn.microsoft.com/en-us/aspnet/core/tutorials/razor-pages/sql?view=aspnetcore-6.0&tabs=visual-studio