c# - System.MissingMethodException : Method not found: 'Void Microsoft. AspNetCore.Identity.DataProtectorTokenProvider

Question

仍然在我遇到问题的同一个项目 DI Registration service type .net core 3.0 .现在当这个问题被修复时，我收到了新的错误。
现在我的代码看起来:

    services.AddDbContext<ApplicationIdentityDbContext>(options =>
        options.UseSqlServer(configuration.GetConnectionString("Default")));

    services.AddIdentityCore<ApplicationUser>(options =>
        {
            options.Password.RequireDigit = false;
            options.Password.RequireLowercase = false;
            options.Password.RequireNonAlphanumeric = false;
            options.Password.RequireUppercase = false;
            options.Password.RequiredLength = 4;

            options.SignIn.RequireConfirmedEmail = true;
            options.Tokens.ProviderMap.Add("CustomEmailConfirmation",
                new TokenProviderDescriptor(
                    typeof(CustomEmailConfirmationTokenProvider<IdentityUser>)));

            options.Tokens.EmailConfirmationTokenProvider = "CustomEmailConfirmation";

        })
        .AddEntityFrameworkStores<ApplicationIdentityDbContext>();

    services.AddTransient(o =>
    {
        var service = new CustomEmailConfirmationTokenProvider<IdentityUser>(o.GetService<IDataProtectionProvider>(), o.GetService<IOptions<DataProtectionTokenProviderOptions>>(), o.GetService<ILogger<DataProtectorTokenProvider<IdentityUser>>>());

        return service;
    });

错误是:

System.MissingMethodException: Method not found: 'Void Microsoft.AspNetCore.Identity.DataProtectorTokenProvider1..ctor(Microsoft.AspNetCore.DataProtection.IDataProtectionProvider, Microsoft.Extensions.Options.IOptions1)'.

Answer 1

我遇到了同样的问题，问题与包本身有关。

基本上问题在于其中许多 Microsoft.AspNetCore.*软件包现在移至 Microsoft.AspNetCore.App框架，所以你删除你的 Microsoft.AspNetCore.Identity引用并将其添加到您的项目中:

<ItemGroup>
    <FrameworkReference Include="Microsoft.AspNetCore.App" />
</ItemGroup>

我注意到我的构造函数(和你的一样)缺少附加参数 ILogger<DataProtectorTokenProvider<TUser>> ，您可以在此 link. 上的 .NET Core 3.* 版本中看到