MudBlazorApp/TestApp02/Pages/Login.cshtml.cs

using System;
using System.Collections.Generic;
using System.Security.Claims;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Authentication.Cookies;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using TestApp02.Data;

namespace BlazorCookieAuth.Server.Pages
{
    [AllowAnonymous]
    public class LoginModel : PageModel
    {
        public string ReturnUrl { get; set; }

        private readonly BiudAuthService _biudAuthService;

        public LoginModel(BiudAuthService pbiudAuthService)
        {
            _biudAuthService= pbiudAuthService;
        }

        public async Task<IActionResult> OnGetAsync(string paramUsername, string paramPassword)
        {
            string returnUrl = Url.Content("~/");

            if (ModelState.IsValid)
            {
                ClaimsPrincipal claimsPrincipal = _biudAuthService.AuthenticateUser(paramUsername, paramPassword);
                await HttpContext.SignInAsync(CookieAuthenticationDefaults.AuthenticationScheme, claimsPrincipal);
            }

            //try
            //{
            //    // Clear the existing external cookie
            //    await HttpContext
            //        .SignOutAsync(
            //        CookieAuthenticationDefaults.AuthenticationScheme);
            //}
            //catch { }

            //// *** !!! This is where you would validate the user !!! ***
            //// In this example we just log the user in
            //// (Always log the user in for this demo)

            //var claims = new List<Claim>
            //{
            //    new Claim(ClaimTypes.Name, paramUsername),
            //    new Claim(ClaimTypes.Role, "Administrator"),
            //};

            //var claimsIdentity = new ClaimsIdentity(
            //    claims, CookieAuthenticationDefaults.AuthenticationScheme);

            //var authProperties = new AuthenticationProperties
            //{
            //    IsPersistent = true,
            //    RedirectUri = this.Request.Host.Value
            //};

            //try
            //{
            //    await HttpContext.SignInAsync(
            //    CookieAuthenticationDefaults.AuthenticationScheme,
            //    new ClaimsPrincipal(claimsIdentity),
            //    authProperties);
            //}
            //catch (Exception ex)
            //{
            //    string error = ex.Message;
            //}
            return LocalRedirect(returnUrl);
        }
    }
}