Async Everything!

So I've been migrating my old little windows phone 8 app to UWP for a while now.

But there's a little thing that I just come over with is this "async with out referencing". After a little googling I found that it is not possible to have out referencing with async because of a technical issue.

After reading some proposed workaround. I've come up with my idea to MIMICK the out reference syntax:

public class AsyncTryOut<T>
{
    public bool Status = false;
    public T Out;

    public AsyncTryOut() { }

    public AsyncTryOut( bool b, T r )
    {
        Status = b;
        Out = r;
    }

    public static bool operator true( AsyncTryOut<T> s ) { return s.Status; }
    public static bool operator false( AsyncTryOut<T> s ) { return s.Status; }
}

I often out-referencing variables because of the Try-Out combo. So I can write something like this:

Stream s = null;

// Search Phone library
if ( wStorage.TryGetImgFromLib( "wenku8_" + id, out s ) )
{
	// Do something with s
}
...

With this little helper class, I can keep the old syntax as clear as before and keep the syntax structure look-alike:

AsyncTryOut<Stream> = null;

// Search Phone library
if ( ato = wStorage.TryGetImgFromLib( "wenku8_" + id ) )
{
	Stream s = ato.Out;
	// Do something with s
}
..

However it only works on this condition. If you want the returned result to be a different type. You may want to extend this class with it... ANNnnd it is not practical to just extend each return type with a mostly identical class.

Urgh, nevermind.

Tag(s): asynchronuous C# programming windows phone 8

斟酌鵬兄

Sat Sep 19 2015 15:53:35 GMT+0000 (Coordinated Universal Time)

Last modified: Fri Mar 11 2016 14:31:41 GMT+0000 (Coordinated Universal Time)