异步等待任务 <T> 没有异步/等待

Question

I want my Task to complete before I perform other actions. If I use

Task.WaitAll(task);

it certainly blocks my UI thread. What is the best way to wait asynchronously for a Task to complete, without using async / await (I'm using .NET v4.0)?

Answer 1

You can use async / await also in .NET 4.0 when you add the Microsoft.Bcl.Async NuGet package to your project. Besides this, you have not much choice - either you use asynchronous calls or your block your thread with the method you mentioned already.

However, you're not bound to await when using asynchronous method. You can also use a callback:

task.ContinueWith(r => {
    /* code */
});