我有一个类A，它必须是singleton，并且在创建async Initialization方法时必须调用它.我在DryIoc文档中没有找到合适的功能.在我看来，RegisterDelegate方法是最接近的，但它不接受异步lambda作为参数.
为了清楚起见，我将举一个例子摆在你们面前:
public class A
{
...
public async Task<A> Initialization() {...}
...
}
var instance = await new A().Initialization();
由于two-colored function problem及其相关的复杂性，DryIoc尚不支持async初始化.
基本上，我需要介绍为整个依赖关系链生成的单独的await调用图，其中一些是从ResolveAsync或类似的API开始的async.
如果没有，您可以使用第https://endjin.com/blog/2023/01/dotnet-csharp-lazy-async-initialization条末尾讨论的方法.
在这种方法中，您将把初始化的等待部分从构造阶段移到方法中(S).
因此，您可以将异步初始化作为Func依赖项添加到构造函数中:
public class A
{
readonly Task _finishInitAsync;
// Actually kicking off the initialization part in the constructor to start the job,
// but postpone the await of the already finished or in-progress initialization until the first using method.
// Alternatively, you may use Lazy<Func<A, Task>> parameter instead to postpone the whole initialization until the using method call.
public A(Func<A, Task> initAsync) => _finishInitAsync = initAsync(this);
// Making it static to detach from the A and simplify the passing it around
public static async Task Initialization(A a) {...}
...
public async Task MethodUsingTheInit()
{
await _finishInitAsync();
// do stuff
}
}
container.Register<A>();
container.RegisterDelegate<Func<A, Task>>(_ => a => A.Initialization(a));
var a = container.Resolve<A>();
await a.MethodUsingTheInit();
你可以进入全手动模式，这在我看来要简单得多.
在第一次使用前手动拨打Initialization.
// `New` allows to construct the A by injecting its dependencies from the container,
// but without actually registering the A itself.
var a = container.New<A>();
await A.Initialization(a);
// Then register the fully initialized A into container
container.RegisteInstance(a);
我对这一主题以及替代解决方案的任何 idea 都非常感兴趣.