多个异步/等待链 [英] Multiple async/await chaining

问题描述

如何在C#中进行多个异步/等待链接? 例如，启动几个HTTP请求，然后不等待所有请求，而是在每个请求完成后启动新请求?

How to make multiple async/await chaining in C#? For example, start few HTTP requests and then do not wait all of them, but start new request after each completed?

推荐答案

最简单的方法是编写async方法:

The easiest way to do this is to write an async method:

async Task DownloadAndFollowupAsync(...)
{
  await DownloadAsync();
  await FollowupAsync();
}

然后可以与await Task.WhenAll一起使用:

await Task.WhenAll(DownloadAndFollowupAsync(...),
    DownloadAndFollowupAsync(...));

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