Calling an async method from a synchronous method

Question

I am attempting to run async methods from a synchronous method. But I can\'t await the async method since I am in a synchronous method. I must not be und

Answer 1

Task<TResult>.Result (or Task.Wait() when there's no result) is similar to await, but is a synchronous operation. You should change GetData1() to use this. Here's the portion to change:

Task<Data> dataTask = Task.WhenAny(runningTasks).Result;
runningTasks.Remove(dataTask);
myData = gameTask.Result;

Answer 2

First, I recommend that your "internal" tasks not use Task.Run in their implementation. You should use an async method that does the CPU-bound portion synchronously.

Once your MyAsyncMethod is an async method that does some CPU-bound processing, then you can wrap it in a Task and use parallel processing as such:

internal static void GetData1()
{
    // Start the tasks
    var dataTasks = Enumerable.Range(0, TotalItems)
        .Select(item => Task.Run(() => MyAyncMethod(State[item]))).ToList();

    // Wait for them all to complete
    Task.WaitAll(dataTasks);
}

Your concurrency limiting in your original code won't work at all, so I removed it for simpilicity. If you want to apply a limit, you can either use SemaphoreSlim or TPL Dataflow.

Answer 3

You can call the following:

GetData1().Wait();
GetData2().Wait();
GetData3().Wait();