inotifycompletion|c# inotifycompletion : Tagatay Implement the INotifyCompletion interface. Provide a boolean property called IsCompleted. Provide a parameterless GetResult method that returns void or . Learn about the origin, evolution, and sound of the letters P and E in different alphabets and languages. Britannica provides facts, examples, and references for each letter.
inotifycompletion,mscorlib.dll. Assembly: netstandard.dll. Schedules the continuation action that's invoked when the instance completes. C#. Copy. public void OnCompleted (Action continuation); Implement the INotifyCompletion interface. Provide a boolean property called IsCompleted. Provide a parameterless GetResult method that returns void or .
此类 B 实现 INotifyCompletion 接口，且拥有 bool IsCompleted { get; } 属性、GetResult() 方法、void OnCompleted(Action continuation) 方法。 定义抽象的 Awaiter/Awaitable 这 . A GetAwaiter needs to implement the INotifyCompletion interface (and optionally the ICriticalNotifyCompletion interface) and return a type that itself exposes .命名空间: System.Runtime.CompilerServices 程序集: System.Threading.Tasks.dll 程序集: System.Runtime.dll 程序集: mscorlib.dll 程序集: netstandard.dll
INotifyCompletion.cs. Reference Source Download Feedback License Help.
The INotifyCompletion (and usually ICriticalNotifyCompletion) interface, which introduces an OnCompleted method. This method will be invoked to pass your .
In this case, we need to create an object implementing one of two interfaces: INotifyCompletion or INotifyCriticalCompletion. The latter does not copy the execution .
. 简单说 async/await 是无栈协程。. 无栈协程 的实现依赖于编译器类似 yield return 的功能，也就是把原本一个完整的函数拆成状态机。. 举例来说一个原本的函数长这样：. 熟悉 JavaScript 的话应该会知道，一种非阻塞编程的方法是使用提供回调的 异步函数 . The INotifyCompletion (and usually ICriticalNotifyCompletion) interface, which introduces an OnCompleted method. This method will be invoked to pass your awaitable type the continuation it should execute once it is ready.public interface ICriticalNotifyCompletion : System.Runtime.CompilerServices.INotifyCompletion type ICriticalNotifyCompletion = interface interface INotifyCompletion Public Interface ICriticalNotifyCompletion Implements INotifyCompletion In this post, we’ll focus on extensibility points the C# compiler provides for customizing the behavior of async methods. There are 3 ways how you can control the async method’s machinery: Provide your own async method builder in the System.Runtime.CompilerServices namespace. Use custom task awaiters.
Source from the Microsoft .NET Reference Source that represent a subset of the .NET Framework - microsoft/referencesource 必须实现 INotifyCompletion 接口，此接口带来了 OnCompleted 方法。 另外两个方法不是接口带来的，但是也是实现一个自定义的 Awaiter 必要的方法。. 在你编写完以上两段代码之后，你的 await 就可以编译通过了。. 额外说明一下，GetResult 方法是可以修改返回值的，只要返回值不是 void，那么 await 等待的地方 .Sets the action to perform when the TaskAwaiter object stops waiting for the asynchronous task to complete. Unsafe OnCompleted (Action) This API supports the product infrastructure and is not intended to be used directly from your code. Schedules the continuation action for the asynchronous task associated with this awaiter. The type that GetAwaiter() returns must implement System.Runtime.CompilerServices.INotifyCompletion or the corresponding ICriticalNotifyCompletion interfaces. In addition to implementing the interface's OnCompleted() method, it must also implement two members, called IsCompleted and .标签 c# async-await. 我试图了解 C# 异步机制的实际工作原理，而造成混淆的原因之一是 ICriticalNotifyCompletion 。. 界面。. 该接口 (interface)提供了两种方法: OnCompleted(Action) , 继承自 INotifyCompletion 和 UnsafeOnCompleted(Action) . documentation 对这两种方法都有完全相同的描述 .但是，当我使用 Visual Studio 2015 打开它时，它无法编译。. 每个异步调用都有一个 TaskAwaiter does not implement INotifyCompletion 错误。. 例如下面的代码: public async Task AsyncDelay() {. await Task.Delay(1); } 抛出如下错误: CS4027 'TaskAwaiter' does not implement 'INotifyCompletion'.c# inotifycompletion The purpose of the await operator is to suspend execution of the enclosing async function until the awaited task is complete, and then obtain its outcome. That’s a bit abstract, but the language spec goes into detail in §12.8.8.2 about what is required of a task. Specifically, it’s either a dynamic type or a non- dynamic type that has a A .
方法. GetResult () 结束异步任务完成的等待。. OnCompleted (Action) 此 API 支持产品基础结构，不能在代码中直接使用。. 将操作设置为当 TaskAwaiter 对象停止等待异步任务完成时执行。. UnsafeOnCompleted (Action) 此 API 支持产品基础结构，不能在代码中直接使用。. .
Test2 不实现 INotifyCompletion。 于是我们实现之，编译器又告诉我们： Test2 未包含 GetResult 的定义。 于是我们加上一个空的 GetResult 方法，现在编译器终于不报错了。 现在我们一开始的 DoAsync 和辅助类型变成了这样：
/// public interface IAwaiter : INotifyCompletion { /// /// 获取一个状态，该状态表示正在异步等待的操作已经完成（成功完成或发生了异常）；此状态会被编译器自动调用。 /// 在实现中，为了达到各种效果，可以灵活应用其值：可以始终为 true，或者始 .
但是，当我用visual studio 2015打开它时，它不会编译。每个异步调用都有一个TaskAwaiter does not implement INotifyCompletion错误。 例如，以下代码： public async Task AsyncDelay() { await Task.Delay(1); } 引发以下错误： CS4027“taskawaiter”未实现“inotifCompletion” 任何帮助都将不胜感激。inotifycompletion c# inotifycompletion实现INotifyCompletion(只有一个OnCompleted(Action continuation)方法，用以异步框架挂载回调)，b. 实现IsCompleted属性，c. 实现GetResult方法，如此编译器就能知道如何与该异步操作进行交互，比如最常见的Task对象，就实现了GetAwaiter方法返回一个 TaskAwaiter 对象，但除了TaskAwaiter .
inotifycompletionПространство имен: System.Runtime.CompilerServices Сборка: System.Threading.Tasks.dll Сборка: System.Runtime.dll Сборка:
这里必须实现INotifyCompletion接口所指定的OnCompleted方法，以及GetAwaiter、IsCompleted、GetResult、Complete方法和属性（不要问为什么，我也没太搞明白，特别是Complete中必须调用一下_continuation）。 其次是实现具体业务逻辑的类，例如加载资源。
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