关于autofac 🔗
在asp.net core7 webapi中的使用方法
关于此项目：项目地址
最简单的代码如下（来源至DTCMS）
1var builder = WebApplication.CreateBuilder(args);
2builder.Host.UseServiceProviderFactory(new AutofacServiceProviderFactory()).ConfigureContainer<ContainerBuilder>(builder =>
3{
4 //实现层
5 Assembly service = Assembly.Load("xxx.Service");
6 //接口层
7 Assembly iservice = Assembly.Load("xxx.IService");
8 builder.RegisterAssemblyTypes(service, iservice)
9 .Where(t => (t.FullName.EndsWith("Service")
10 || t.FullName.EndsWith("Notify")
11 || t.FullName.EndsWith("Execute")) && !t.IsAbstract) //类名以service结尾，且类型不能是抽象的
12 .AsImplementedInterfaces()
13 .InstancePerDependency();
14 // 从程序集中注册所有实现了IService接口的服务
15});
以上便完成了对上述两个程序集的自动注入
请注意，如上只是一个简单的示例,在不同的项目需要注入的方式不同，如果是Transient/Scoped/Singleton 需要单独配置
2023/11/14日更新 🔗
正好有项目用到了按照不同的service来配置不同的生命周期,所以来更新一下
目前看到的其他项目用到的都是以文件名结尾的,总感觉不是很优雅,所以我采用的特性来完成
首先创建一个enum和Attribute
1 /// <summary>
2 /// 生命周期
3 /// </summary>
4 public enum LifeCycle
5 {
6 /// <summary>
7 /// 单例
8 /// </summary>
9 Singleton,
10
11 /// <summary>
12 /// 作用域
13 /// </summary>
14 Scoped,
15
16 /// <summary>
17 /// 瞬态
18 /// </summary>
19 Transient
20 }
1 public class LifeCycleAttribute : Attribute
2 {
3 public LifeCycleAttribute(LifeCycle lifeCycle)
4 {
5 LifeCycleVal = lifeCycle;
6 }
7
8 public LifeCycle LifeCycleVal { get; }
9 }
然后在Program.cs中编写如下代码
1builder.Host.UseServiceProviderFactory(new AutofacServiceProviderFactory())
2 .ConfigureContainer<ContainerBuilder>(builder =>
3 {
4 //实现层
5 Assembly service = Assembly.Load("GaoXinInternal.Services");
6 //接口层
7 Assembly iservice = Assembly.Load("GaoXinInternal.IServices");
8 //单例
9 builder.RegisterAssemblyTypes(service, iservice)
10 .Where(t => t.GetCustomAttributes<LifeCycleAttribute>(true)
11 .Any(attr => attr.LifeCycleVal == LifeCycle.Singleton))
12 .AsImplementedInterfaces()
13 .SingleInstance();
14
15
16 //作用域
17 builder.RegisterAssemblyTypes(service, iservice)
18 .Where(t => t.GetCustomAttributes<LifeCycleAttribute>(inherit: true)
19 .Any(attr => attr.LifeCycleVal == LifeCycle.Scoped))
20 .InstancePerLifetimeScope()
21 .AsImplementedInterfaces();
22
23 //瞬态
24 builder.RegisterAssemblyTypes(service, iservice)
25
26 .Where(t => t.GetCustomAttributes<LifeCycleAttribute>(inherit: true)
27 .Any(attr => attr.LifeCycleVal == LifeCycle.Transient))
28 .InstancePerDependency()
29 .AsImplementedInterfaces();
30 });
这里的程序集名称请按照自己项目的名称进行修改
然后在service的class上面加上特性，用于指定该类以什么生命周期进行
1namespace GaoXinInternal.Services
2{
3 [LifeCycle(LifeCycle.Singleton)]
4 public class BaseService : IBaseService
5 {
6 private readonly IDbConnectionFactory _connectionFactory;
7
8 public BaseService(IDbConnectionFactory connectionFactory)
9 {
10 _connectionFactory = connectionFactory;
11 }
12 }
13}
以上，即可完成对autofac的自动注入