Hi
On 2013.04.17 01:58, Paul Johnson wrote:
Hi,
Why don't You try
var getLoginTask = MyEvents.UserSignIn_Async(username, password);
and see returning type??
UserSignIn_Async returns void. The compiler moaned when I tried
var getLoginTask...
Hm..
Async functions with retrun type void or type return statements must not
have expression
(from MS docs)
Now I wonder how is this interpreted/converted? Probably void, cos Your
function returns void;
I guess
async Task UserSignIn_Async(string username, string password)
{
return;
}
while You have:
async void UserSignIn_Async(string username, string password)
{
return;
}
and this is reason why
var retval = = MyEvents.UserSignIn_Async(username, password);
moans, You cannot assign void to variable (never crossed-my-mind/tried).
AIUI, if you're firing an event and really don't care what happens (as
in this case), then private async void is fine
Have You tried to change sig of the function (actually this is not sig
in c# - return value is not
considered like in c++).
I'm not sure about the RunOnUiThread part. My understanding is that as
the call is being made in an async method, it has to jump onto the UI
thread for something to be displayed.
I think (even Miguel has stated yesterday) that async/await is about
freeing us from thinking
about in which context we are and where we return (await completion).
... but I'm still on reading and looking under the hood...
I still try to grasp naming/nomenclature here [lightweight] threads,
fibers, co-routines.
It is a great help and will make code robuster and eventually faster..
But what is behind the scenes? Thread created (System.Threading.Thread)
or not?.
I guess more reading and channel9 watching
cheers
mel
Thanks
Paul
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