autofac | 易学教程

Autofac property injection in base class

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问题 I am working on a Windows Phone 8.1 application and I have a base class with public property. public class ViewModelBase { public ISomeClass MyProp {get;set;} } My derived class looks like this public class MainViewModel : ViewModelBase { private readonly INavigation _navigation; public MainViewModel(INavigation navigation) { _navigation = navigation; } } In my App.cs I have var builder = new ContainerBuilder(); builder.RegisterType<Navigation>().As<INavigation>(); builder.RegisterType

Send messages via SignalR HubContext from method in project outside where Hubs are located

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问题 I have a WebAPI project where the API, Service and Data layers are all in separate projects of the same solution. As part of a method in my Service project, I want to send a message to the connected clients of a hub in the API project. So far all of the examples I have found have everything in a single project and use a controller as the example sending a message via a hub. I've tried dependency injection (Autofac) however I am unable to get a reference to the MessageHub. [HubName("messages")

ASP.NET Core MediatR error: Register your handlers with the container

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问题 I have a .Net Core app where i use the .AddMediatR extension to register the assembly for my commands and handlers following a CQRS approach. In ConfigureServices in Startup.cs i have used the extension method from the official package MediatR.Extensions.Microsoft.DependencyInjection with the following parameter: services.AddMediatR(typeof(AddEducationCommand).GetTypeInfo().Assembly); The command and commandhandler classes are as follow: AddEducationCommand.cs public class AddEducationCommand

ASP.NET Core MediatR error: Register your handlers with the container

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Autofac injection of IHubContext SignalR MVC

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问题 I am trying to get SignalR working with Autofac. I have a repo of a stripped back version of what I have done here: https://github.com/justsayno/signalr-autofac This is adapted from which works using GlobalHost : https://github.com/sstorie/experiments/tree/master/angular2-signalr That works just fine using hte GlobalHost object. I have attempted to follow the documentation on Autofac's site about how to inject SignalR services but I cannot get it to work. This is my config file for

从壹开始前后端分离【 .NET Core2.2/3.0 +Vue2.0 】框架之九 || 依赖注入IoC学习 + AOP界面编程初探

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本文3.0版本文章 https://mp.weixin.qq.com/s/3s4_PuuESN-Y8QXZHakHtw 本文是NetCore 2.2的，请不要套用3.0 1、如果看不懂本文，或者比较困难，先别着急问问题，我单写了一个关于依赖注入的小Demo，可以下载看看，多思考思考注入的原理： https://github.com/anjoy8/BlogArti/tree/master/Blog.Core_IOC%26DI 2、重要：如果你实现了解耦，也就是 api 层只引用了 IService 和 IRepository 的话，那每次修改 service 层，都需要清理解决方案，重新编译项目，因为这个时候你的api层的dll，还是之前未修改的代码。 3、重要+ ：请注意，依赖注入的目的不是为了解耦，依赖注入是为了控制反转，通俗来说，就是不用我们自己去 new 服务实例了，所以大家不需要一定去解耦（比如下文说到的我没有引用 Service层和 Repository层），我下一个DDD系列，依赖注入就没有解耦，因为我用的是自带的注入，不是Autofac的反射dll ，我解耦的目的，是为了让大家更好的理解，服务是怎么注入到宿主容器里的。　　说接上文，上回说到了《八 || API项目整体搭建 6.3 异步泛型+依赖注入初探》，后来的标题中，我把仓储两个字给去掉了

Autofac method level interception with Castle DynamicProxy in .NET Core 2

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问题 I currently wrote an Interceptor which code is below public class TransactionalInterceptor : IInterceptor { public void Intercept(IInvocation invocation) { using (var transaction = ...) { try { invocation.Proceed(); transaction.Commit(); } catch { transaction.Rollback(); } finally { transaction.Dispose(); } } } } but when register this interceptor it will apply to all methods. I have a service class with a repository injected having CRUD methods. I don't want a transaction to be opened for

Autofac method level interception with Castle DynamicProxy in .NET Core 2

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Inject SignalR IHubContext into service layer with Autofac

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问题 In an app running Framework 4.72, not .NET Core, I'm trying to inject a SignalR IHubContext into a Web API 2.x service. I have my solution broken into three projects, web, service, data. The SignalR hub is in the web layer. I have background code that runs in the service layer and when complete I need it to send a mesage via the hub. This background task is not initiated by the controller. My Global.asax is pretty standard: protected void Application_Start() { GlobalConfiguration.Configure

从壹开始前后端分离【 .NET Core2.0/3.0 +Vue2.0 】框架之十 || AOP面向切面编程浅解析：简单日志记录 + 服务切面缓存

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本文3.0版本文章 https://mp.weixin.qq.com/s/pjvleNGi_AazZ7COdxQyPQ 代码已上传Github+Gitee，文末有地址　　上回《从壹开始前后端分离【 .NET Core2.0 Api + Vue 2.0 + AOP + 分布式】框架之九 || 依赖注入IoC学习 + AOP界面编程初探》咱们说到了依赖注入Autofac的使用，不知道大家对IoC的使用是怎样的感觉，我个人表示还是比较可行的，至少不用自己再关心一个个复杂的实例化服务对象了，直接通过接口就满足需求，当然还有其他的一些功能，我还没有说到，抛砖引玉嘛，大家如果有好的想法，欢迎留言，也可以来群里，大家一起学习讨论。昨天在文末咱们说到了AOP面向切面编程的定义和思想，我个人简单使用了下，感觉主要的思路还是通过拦截器来操作，就像是一个中间件一样，今天呢，我给大家说两个小栗子，当然，你也可以合并成一个，也可以自定义扩展，因为我们是真个系列是基于Autofac框架，所以今天主要说的是基于Autofac的Castle动态代理的方法，静态注入的方式以后有时间可以再补充。　　时间真快，转眼已经十天过去了，感谢大家的鼓励，批评指正，希望我的文章，对您有一点点儿的帮助，哪怕是有学习新知识的动力也行，至少至少，可以为以后跳槽增加新的谈资 [哭笑]，这些天我们从面向对象OOP的开发

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