Bonjour,
Je débute avec ASP NET CORE MVC, j'ai choisi l'approche code first pour mon projet et j'ai suivis un tutoriel.
J'ai une classe BddContext.cs:
J'ai créé des modèles pour l'exemple :
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26 using System; using System.Collections.Generic; using System.Linq; using System.Threading.Tasks; using Madera.Models; using Microsoft.EntityFrameworkCore; using Microsoft.Extensions.Configuration; using MySQL.Data.EntityFrameworkCore; namespace Madera.Context { public class BddContext : DbContext { public static string ConnectionString { get; set; } public static IConfigurationRoot Configuration { get; set; } public DbSet<Person> Persons { get; set; } public DbSet<Employee> Employees { get; set; } public DbSet<Client> Clients { get; set; } protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) { optionsBuilder.UseMySQL(@ConnectionString); } } }
J'ai par la suite généré des vues et un contrôleur via mon modèle "client" en utilisant les fonctionnalité de l'IDE Visual Studio.
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42 namespace Madera.Models { public class Person { public int ID { get; set; } public string LastName { get; set; } public string FirstName { get; set; } public string Email { get; set; } public string Address { get; set; } public string PostalCode { get; set; } public string City { get; set; } public string Country { get; set; } public string Phone { get; set; } } public class Client : Person { public int ID { get; set; } public int ClientNumber { get; set; } } public class Employee : Person { public int ID { get; set; } public string WorkPlace { get; set; } public string Function { get; set; } public string SocialSecurityNumber { get; set; } } public class User { public User(Employee pEmployee) { this.Employee = pEmployee; } public int ID { get; set; } public string Login { get; set; } public string Password { get; set; } public Employee Employee { get; set; } } }
Statup.cs :
Program.cs :
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60 using System; using System.Collections.Generic; using System.Linq; using System.Threading.Tasks; using Madera.Context; using Madera.Models; using Microsoft.AspNetCore.Builder; using Microsoft.AspNetCore.Hosting; using Microsoft.AspNetCore.HttpsPolicy; using Microsoft.EntityFrameworkCore; using MySQL.Data.EntityFrameworkCore; using Microsoft.Extensions.Configuration; using Microsoft.Extensions.DependencyInjection; using Microsoft.Extensions.Hosting; namespace Madera { public class Startup { public Startup(IConfiguration configuration) { Configuration = configuration; } public IConfiguration Configuration { get; } // This method gets called by the runtime. Use this method to add services to the container. public void ConfigureServices(IServiceCollection services) { services.AddMvc(); BddContext.ConnectionString = Configuration.GetConnectionString("MaderaBDD"); } // This method gets called by the runtime. Use this method to configure the HTTP request pipeline. public void Configure(IApplicationBuilder app, IWebHostEnvironment env) { if (env.IsDevelopment()) { app.UseDeveloperExceptionPage(); } else { app.UseExceptionHandler("/Home/Error"); // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts. app.UseHsts(); } app.UseHttpsRedirection(); app.UseStaticFiles(); app.UseRouting(); app.UseAuthorization(); app.UseEndpoints(endpoints => { endpoints.MapControllerRoute( name: "default", pattern: "{controller=Home}/{action=Index}/{id?}"); }); } } }
Mais quand j'essaie d’accéder au lien: https://localhost:44353/Clients j'ai l'erreur suivante:
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28 using System; using System.Collections.Generic; using System.Linq; using System.Threading.Tasks; using Madera.Context; using Madera.Models; using Microsoft.AspNetCore.Hosting; using Microsoft.Extensions.Configuration; using Microsoft.Extensions.Hosting; using Microsoft.Extensions.Logging; namespace Madera { public class Program { public static void Main(string[] args) { CreateHostBuilder(args).Build().Run(); } public static IHostBuilder CreateHostBuilder(string[] args) => Host.CreateDefaultBuilder(args) .ConfigureWebHostDefaults(webBuilder => { webBuilder.UseStartup<Startup>(); }); } }
System.InvalidOperationException: Unable to resolve service for type 'Madera.Context.BddContext' while attempting to activate 'Madera.Controllers.ClientsController'.
at Microsoft.Extensions.DependencyInjection.ActivatorUtilities.GetService(IServiceProvider sp, Type type, Type requiredBy, Boolean isDefaultParameterRequired)
at lambda_method(Closure , IServiceProvider , Object[] )
at Microsoft.AspNetCore.Mvc.Controllers.ControllerActivatorProvider.<>c__DisplayClass4_0.<CreateActivator>b__0(ControllerContext controllerContext)
at Microsoft.AspNetCore.Mvc.Controllers.ControllerFactoryProvider.<>c__DisplayClass5_0.<CreateControllerFactory>g__CreateController|0(ControllerContext controllerContext)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeInnerFilterAsync()
--- End of stack trace from previous location where exception was thrown ---
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|24_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync()
--- End of stack trace from previous location where exception was thrown ---
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)
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