小编Rah*_*hul的帖子

尝试使用 MediatR 在 .Net Core 3.1 微服务中注入 Fluent Validation而不使用Structure Map。

在 Nuget 包下面添加：

<PackageReference Include="FluentValidation.AspNetCore" Version="8.6.2" />
<PackageReference Include="MediatR" Version="4.0.1" />
<PackageReference Include="MediatR.Extensions.Microsoft.DependencyInjection" Version="4.0.0" />

启动.cs：

services.AddMvc(options =>
            {
                options.Filters.Add(typeof(HttpGlobalExceptionFilter));
                options.EnableEndpointRouting = false;
            }).AddControllersAsServices()
            .AddNewtonsoftJson()
            .AddViewLocalization(
                       LanguageViewLocationExpanderFormat.Suffix,
                       opts => { opts.ResourcesPath = "Resources"; })
            .AddDataAnnotationsLocalization()
            .SetCompatibilityVersion(CompatibilityVersion.Version_3_0)
            .AddFluentValidation(fv=> fv.RegisterValidatorsFromAssemblyContaining(typeof(Startup)));

注册的 IPipelineBehavior 和验证器：

services.AddMediatR();

services.AddTransient(typeof(IPipelineBehavior<,>), typeof(ValidatorBehaviour<,>));

ValidatorBehaviour.cs：

public class ValidatorBehaviour<TRequest, TResponse> : IPipelineBehavior<TRequest, TResponse>
    {
        private readonly IValidator<TRequest>[] _validators;
        public ValidatorBehaviour(IValidator<TRequest>[] validators) => _validators = validators;

        public async Task<TResponse> Handle(TRequest …