在下一页：
http://www.asp.net/signalr/overview/signalr-20/extensibility/dependency-injection
在底部附近(正好在文本“RegisterHubs.Start”下方),我试图使用Autofac重现一段Ninject代码.
到目前为止,我已经成功地让自己头痛,但没有多少.我已经搜索了Autofac wiki和网页以获得一些帮助.虽然,我相信我可能错过了一些信息.
public static class RegisterHubs
{
public static void Start()
{
var kernel = new StandardKernel();
var resolver = new NinjectSignalRDependencyResolver(kernel);
kernel.Bind<IStockTicker>()
.To<Microsoft.AspNet.SignalR.StockTicker.StockTicker>()
.InSingletonScope();
kernel.Bind<IHubConnectionContext>().ToMethod(context =>
resolver.Resolve<IConnectionManager>().
GetHubContext<StockTickerHub>().Clients
).WhenInjectedInto<IStockTicker>();
var config = new HubConfiguration()
{
Resolver = resolver
};
App.MapSignalR(config);
}
}
更新2：我还想添加试图编写的对象.
public class StockTickerHub : Hub
{
private readonly IStockTicker _stockTicker;
public StockTickerHub(IStockTicker stockTicker) { }
}
public class StockTicker
{
public StockTicker(IHubConnectionContext clients) { }
}
解决方法
Autofac没有等效的WhenInjectedInto方法.但是,您可以使用命名参数完成相同的操作.
尝试这样的事情
using Autofac.Integration.SignalR;
using Microsoft.AspNet.SignalR.StockTicker;
public static class RegisterHubs
{
public static void Start()
{
var builder = new ContainerBuilder();
builder.RegisterType<StockTicker>()
.WithParameter(ResolvedParameter.ForNamed("StockTickerContext"))
.As<IStockTicker>()
.SingleInstance();
builder.Register(c => GlobalHost.DependencyResolver.Resolve<IConnectionManager>().GetHubContext<StockTickerHub>().Clients)
.Named<IHubConnectionContext>("StockTickerContext");
var container = builder.Build();
var resolver = new AutofacDependencyResolver(container);
var config = new HubConfiguration { Resolver = resolver };
App.MapSignalR(config);
}
}
注意：AutofacDependencyResolver来自Autofac.Integration.SignalR.
更新：啊,我错过了链接页面上的一个小细节; IHubConnectionContext的工厂函数使用解析器来获取IConnectionManager,而不是容器本身(当然容器不会知道IConnectionManager).我切换到使用默认依赖项解析器(GlobalHost.DependencyResolver)来获取IConnectionManager.这应该工作.
