官方文档地址:https://docs.microsoft.com/zh-cn/dotnet/csharp/programming-guide/concepts/async/
Coffee cup = PourCoffee(); Console.WriteLine("coffee is ready"); Task<Egg> eggTask = FryEggs(2); Task<Bacon> baconTask = FryBacon(3); Task<Toast> toastTask = ToastBread(2); Toast toast = await toastTask; ApplyButter(toast); ApplyJam(toast); Console.WriteLine("toast is ready"); Juice oj = PourOJ(); Console.WriteLine("oj is ready"); Egg eggs = await eggTask; Console.WriteLine("eggs are ready"); Bacon bacon = await baconTask; Console.WriteLine("bacon is ready"); Console.WriteLine("Breakfast is ready!");
static async Task Main(string[] args) { Coffee cup = PourCoffee(); Console.WriteLine("coffee is ready"); var eggsTask = FryEggsAsync(2); var baconTask = FryBaconAsync(3); var toastTask = MakeToastWithButterAndJamAsync(2); var eggs = await eggsTask; Console.WriteLine("eggs are ready"); var bacon = await baconTask; Console.WriteLine("bacon is ready"); var toast = await toastTask; Console.WriteLine("toast is ready"); Juice oj = PourOJ(); Console.WriteLine("oj is ready"); Console.WriteLine("Breakfast is ready!"); async Task<Toast> MakeToastWithButterAndJamAsync(int number) { var toast = await ToastBreadAsync(number); ApplyButter(toast); ApplyJam(toast); return toast; } }
static async Task Main(string[] args) { Coffee cup = PourCoffee(); Console.WriteLine("coffee is ready"); var eggsTask = FryEggsAsync(2); var baconTask = FryBaconAsync(3); var toastTask = MakeToastWithButterAndJamAsync(2); var allTasks = new List<Task>{eggsTask, baconTask, toastTask}; while (allTasks.Any()) { Task finished = await Task.WhenAny(allTasks); if (finished == eggsTask) { Console.WriteLine("eggs are ready"); } else if (finished == baconTask) { Console.WriteLine("bacon is ready"); } else if (finished == toastTask) { Console.WriteLine("toast is ready"); } allTasks.Remove(finished); } Juice oj = PourOJ(); Console.WriteLine("oj is ready"); Console.WriteLine("Breakfast is ready!"); async Task<Toast> MakeToastWithButterAndJamAsync(int number) { var toast = await ToastBreadAsync(number); ApplyButter(toast); ApplyJam(toast); return toast; } }