first commot

Common/ServiceExtension.cs

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+using System.Reflection;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace Common;
+
+/// <summary>
+/// 服务依赖注入扩展
+/// </summary>
+public static class ServiceExtension
+{
+    /// <summary>
+    /// 自动扫描并注册服务和仓储
+    /// </summary>
+    public static IServiceCollection AddServices(this IServiceCollection services)
+    {
+        // 扫描程序集
+        var serviceAssembly = Assembly.Load("Service");
+        var repositoryAssembly = Assembly.Load("Repository");
+
+        // 注册所有服务实现
+        RegisterServices(services, serviceAssembly);
+        
+        // 注册所有仓储实现
+        RegisterRepositories(services, repositoryAssembly);
+
+        return services;
+    }
+
+    private static void RegisterServices(IServiceCollection services, Assembly assembly)
+    {
+        var types = assembly.GetTypes()
+            .Where(t => t.IsClass && !t.IsAbstract);
+
+        foreach (var type in types)
+        {
+            var interfaces = type.GetInterfaces()
+                .Where(i => i.Name.StartsWith("I") && i.Namespace != null && i.Namespace.StartsWith("Service"));
+
+            foreach (var @interface in interfaces)
+            {
+                // EmailBackgroundService 必须是 Singleton（后台服务），其他服务可用 Transient
+                if (type.Name == "EmailBackgroundService")
+                {
+                    services.AddSingleton(@interface, type);
+                }
+                else if (type.Name == "EmailFetchService")
+                {
+                    // EmailFetchService 用 Transient，避免连接冲突
+                    services.AddTransient(@interface, type);
+                }
+                else
+                {
+                    services.AddSingleton(@interface, type);
+                }
+            }
+        }
+    }
+
+    private static void RegisterRepositories(IServiceCollection services, Assembly assembly)
+    {
+        var types = assembly.GetTypes()
+            .Where(t => t.IsClass && !t.IsAbstract);
+
+        foreach (var type in types)
+        {
+            var interfaces = type.GetInterfaces()
+                .Where(i => i.Name.StartsWith("I") 
+                         && i.Namespace == "Repository"
+                         && !i.IsGenericType); // 排除泛型接口如 IBaseRepository<T>
+
+            foreach (var @interface in interfaces)
+            {
+                services.AddSingleton(@interface, type);
+                Console.WriteLine($"注册 Repository: {@interface.Name} -> {type.Name}");
+            }
+        }
+    }
+}
+