如何获得与用户模型类属性相关联的值，以便使用访问令牌进行登录重定向？

问题描述

UsuarioModel类

public class UsuarioModel
    {
        public int CodUsuario { get; set; }
        public string Nome { get; set; }
        public string Senha { get; set; }
        public string Telefone { get; set; }
        public DateTime DataRegisto { get; set; }
        public bool Estado { get; set; }
        public int CodPerfil { get; set; }
    }

登录ApiService方法

public async Task<string> LoginAsync(string nome,string senha)
        {
            var keyvalues = new List<keyvaluePair<string,string>>
            {
                new keyvaluePair<string,string>("username",nome),new keyvaluePair<string,string>("password",senha),string>("grant_type","password")
            };

            var request = new HttpRequestMessage(HttpMethod.Post,Constants.BaseApiAddress + "token");
            
            request.Content = new FormUrlEncodedContent(keyvalues);

            var client = new HttpClient();

            var response = await client.SendAsync(request);

            var content = await response.Content.ReadAsstringAsync();

            JObject jwtDynamic = JsonConvert.DeserializeObject<dynamic>(content);

            var accesstokenExpiration = jwtDynamic.Value<DateTime>(".expires");
            var accesstoken = jwtDynamic.Value<string>("access_token");

            Settings.AccesstokenExpirationDate = accesstokenExpiration;

            Debug.WriteLine(accesstokenExpiration);

            Debug.WriteLine(content);

            return accesstoken;
        }

通过生成访问令牌，此方法可以正常工作。但是我的问题是：我如何获得接收访问令牌的用户的“ CodPerfil”值，以验证应该定向到的菜单？

viewmodel

public class Loginviewmodel : Baseviewmodel
    {

        private readonly ApiServices _apiServices = new ApiServices();

        public string Nome { get; set; }
        public string Senha { get; set; }

        public ICommand LoginCommand
        {
            get
            {
                return new Command(async () =>
                {
                    var accesstoken = await _apiServices.LoginAsync(Nome,Senha);
                    Settings.Accesstoken = accesstoken;
                    Login();
                });
            }
        }

        public async void Login()
        {
            var usuario = new UsuarioModel
            {
                Nome = Nome,Senha = Senha,CodPerfil = CodPerfil
            };

            Settings.CodPerfil = CodPerfil;
            if (CodPerfil == 1)
            {
                App.Current.MainPage = new MenuMorador();
            }
            else
            {
                App.Current.MainPage = new MenuRecolhedor();
            }
        }

        public Loginviewmodel()
        {
            Nome = Settings.Nome;
            Senha = Settings.Senha;
        }

当我通过断点执行此方法时，“ CodPerfil”变量没有收到任何值。问题是：如何接收与已注册用户相关联的“ CodPerfil”属性的值，以便在接收访问令牌后验证他们将定向到的菜单？

启动课程

public class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            ConfigureAuth(app);
            GlobalConfiguration.Configure(WebApiConfig.Register);
        }

        public void ConfigureAuth(IAppBuilder app)
        {
            //this is very important line cross orgin source(CORS)it is used to enable cross-site HTTP requests  
            //For security reasons,browsers restrict cross-origin HTTP requests  
            app.UseCors(CorsOptions.AllowAll);

            var OAuthOptions = new OAuthAuthorizationServerOptions
            {
                AllowInsecureHttp = true,TokenEndpointPath = new PathString("/token"),AccesstokenExpireTimeSpan = TimeSpan.FromDays(10),//token expiration time  
                Provider = new OauthProvider()
            };

            app.USEOAuthBearerTokens(OAuthOptions);
            app.USEOAuthAuthorizationServer(OAuthOptions);
            app.USEOAuthBearerAuthentication(new OAuthBearerAuthenticationoptions());

            HttpConfiguration config = new HttpConfiguration();
            WebApiConfig.Register(config);//register the request  
        }
    }

OauthProvider类

public class OauthProvider : OAuthAuthorizationServerProvider
    {
        public override async Task ValidateClientAuthentication(OAuthValidateClientAuthenticationContext context)
        {
            await Task.Run(() => context.Validated());
        }

        public override async Task GrantResourceOwnerCredentials(OAuthGrantResourceOwnerCredentialsContext context)
        {
            var identity = new ClaimsIdentity(context.Options.AuthenticationType);

            using (var db = new DataContext2())
            {
                if (db != null)
                {
                    var user = db.Usuario.Where(o => o.Nome == context.UserName && o.Senha == context.Password).FirstOrDefault();
                    if (user != null)
                    {
                        identity.AddClaim(new Claim(ClaimTypes.Role,user.CodPerfil.ToString()));
                        identity.AddClaim(new Claim(ClaimTypes.Name,user.Nome));
                        identity.AddClaim(new Claim("LoggedOn",DateTime.Now.ToString()));
                        await Task.Run(() => context.Validated(identity));
                    }
                    else
                    {
                        context.SetError("Wrong Crendtials","Provided username and password is incorrect");
                    }
                }
                else
                {
                    context.SetError("Wrong Crendtials","Provided username and password is incorrect");
                }
                return;
            }
        }
    }

解决方法

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