CODEWITHSUNDEEP
c#.netasynchronousasync-await
rb_
rb_

Reputation: 11

Calling an async method and returning a value in .NET

Is there an easy way in .net to wait for an async function to fetch its returned result?

I wrote code like this but maybe there is a standard solution?

T WaitForResult<T>(Func<Task<T>> async)
{
    Task<T> task = async.Invoke();
    task.Wait();
    return task.Result;
}

e.g.

async Task<string> f()
{
...
}

void g()
{
    string str = WaitForResult( () => f() );
}

If we use await instead that, the g function would have to be marked as async. How to avoid this?

Upvotes: 0

Views: 92

Answers (1)

KnuturO
KnuturO

Reputation: 1635

async Task<string> f()
{
...
}

Is called by

string s = await f();

If you are calling from a non async function and you cannot change this you can use.

string s = f().GetAwaiter().GetResult();

or

string s = f().Result;

But this is not recommend as it kinda brakes the async pattern.

Upvotes: 1

Related Questions