Async question

[wriedmann]

Hi Nick,
thank you very much, I will try it.

But in the meantime I have tried something other and it seems to work:

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oThread := System.Threading.Thread{ { => self:_ConnectA( cHostName, cUserName, cPassword, nPort, oConfig ) } }
oThread:Start()
while oThread:IsAlive
	System.Threading.Thread.Sleep( 10 )
end

Using this code my debug output shows the right sequence:

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Creating AsyncFtpClient
Creating Task Connect()
Awaiting Task Connect()
Task Connect() finished
Waited 00:00:00.2349512
Connected is True

Is there anything that makes this code dangerous?

Wolfgang

[NickFriend]

Hi Wolfgang,

To be honest I'm not entirely sure if there's a problem with the way you're doing it.... the only thing that occurs to me is that your code has no real means of error trapping, which is covered by the AsyncHelper class. Also it seems a bit ugly to use Sleep!

I've been using the helper class for years now without issue (though of course by definition it's use is very limited in our app).

Nick

[HansjoergP]

Hi Wolfgang,

why you don't use "oThread:Wait()"?

[wriedmann]

Hi Hansjörg,

why you don't use "oThread:Wait()"?

I don't have that method....

Wolfgang

[wriedmann]

Hi Nick,
I'm now trying to translate that class to X#.
@Robert: I remember there was a discussion about how to translate the underscore to X#:

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synch.Post(async _ =>
            {
                try
                {
                    await task();
                }
                catch (Exception e)
                {
                    synch.InnerException = e;
                    throw;
                }
                finally
                {
                    synch.EndMessageLoop();
                }
            }, null);

Wolfgang

[HansjoergP]

Okay. I have seen now you use Thread instead of Task. Try using the Task.Run
https://learn.microsoft.com/de-de/dotne ... work-4.7.2

[NickFriend]

Sorry, can't help you there... can't you just leave it in a class library to avoid the pain of translation?

Nick

[wriedmann]

Hi Nick,
as temporary solution it works as separate library, but to deliver it I need to translate it to X#.
But the good thing: it seems to work very well and simplifies my code a lot.
Wolfgang

[wriedmann]

Hi Hansjörg,
with Task.Run it does not works - the method does not permits that.
It works only with a Thread, with a Task it is not executed.
With Nicks class it works more elegantly.
Wolfgang

[wriedmann]

Hi Robert or Chris,
how do I translate this code from C# to X#?

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Post(_ => done = true, null);

It is the method from this class:
https://learn.microsoft.com/en-us/dotne ... work-4.8.1
When I write

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self:Post( { => self:done := true }, null )

the compiler says

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error XS1593: Delegate 'System.Threading.SendOrPostCallback' does not take 0 arguments

Thank you very much for any hint!
Wolfgang