并行调用方法并合并结果 [英] Call methods parallel and combine results

问题描述

我有一个MainMethod，它需要并行调用两个方法Method1和Method2.他们两个都将从不同的数据库返回Employee列表.我需要并行调用它们，然后在MainMethod中合并Method1和Method2的结果，然后将结果返回给MainMethod的调用者.

I have a MainMethod which needs to call two methods Method1 and Method2 parallel. Both of them will return list of Employee but from different database. I need to call them parallel and then combine the results of Method1 and Method2 in MainMethod and then return result to the caller of MainMethod.

如果人们能说出方法的签名和我需要编写的代码，我非常感激.我的意思是异步/等待关键字.

I greatly appreciate if people can tell what must be signatures of methods and what code I need to write I mean async/await keywords.

推荐答案

您可以将它们作为2个Task<T>运行. Result属性负责等待.大约:

You can run them as 2 Task<T>s. The Result property takes care of the waiting. Approximately:

// untested 
Task<List<Employee>> t1 = Task.Factory.StartNew(() => Method1());
Task<List<Employee>> t2 = Task.Factory.StartNew(() => Method2());

var result = t1.Result.Concat(t2.Result);

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