Two asynchronous threads with async and await

Question

Hi !!

Using Async CTP and Await

I need two threads running in parallel when I run the other one is independent so that I can do what I want on the screen:

ex: I have an asynchronous method that has a Thread.Sleep 10 seconds for example, and also have a small form where I can update in quanquelr point during those ten seconds.

In short I have a screen with two buttons, one performs an asynchronous method of sleep while the other can update the form as many times as you want to sleep after the end a message to the user who finished speaking.

Someone help me please?

Answer 1

Code:

private void sleep()
        {
            Thread.Sleep(5000);
        }
        private async void ExecutarAssincronos()
        {
            txtAssincrono.Text = "teste";
            await TaskEx.Run(() => sleep());
            await TaskEx.Run(() => PassoTresAssincrono());
        }
        private void ExecutarSincronos()
        {
            txtSincrono.Text = txtAssincrono.Text;
        }
        private void PassoTresAssincrono()
        {
            Thread.Sleep(1000);
            lblResult.Text = "Assíncrono";
        }

        protected void btnIniciar_Click(object sender, EventArgs e)
        {
            ExecutarAssincronos();
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            ExecutarSincronos();
        }

Answer 2

someone? :(

Answer 3

I don't think you need two threads. You can start two asynchronous operations and have them both running at the same time.

When exploring Async, you don't ever want to use Thread.Sleep. Use Task(Ex).Delay instead. Also, it's a good idea to write "async Task" methods when possible, and only use "async void" for event handlers.

Try this code:

private async Task sleep()
{
  await TaskEx.Delay(5000);
}

private async Task ExecutarAssincronos()
{
  txtAssincrono.Text = "teste";
  await sleep();
  await PassoTresAssincrono();
}

private async Task PassoTresAssincrono()
{
  await TaskEx.Delay(1000);
  lblResult.Text = "Assíncrono";
}

protected async void btnIniciar_Click(object sender, EventArgs e)
{
  await ExecutarAssincronos();
}

      -Steve

---

Programming blog: http://nitoprograms.blogspot.com/
  Including my TCP/IP .NET Sockets FAQ
  and How to Implement IDisposable and Finalizers: 3 Easy Rules
Microsoft Certified Professional Developer

How to get to Heaven according to the Bible

Answer 4

still did not workwhenI clickthe buttoniniciarAssincronahe makes hiscasemore if Iclick oniniciarSsincrona before ithas finished runningaboveit is interruptedtothe implementation of thesecond click,I needthemdiquemindependent of each other

private async Task sleep()
        {
            await TaskEx.Delay(5000);
        }

        private async Task ExecutarAssincronos()
        {
            txtAssincrono.Text = "teste";
            await sleep();
            await PassoTresAssincrono();
            
        }

        private async Task PassoTresAssincrono()
        {
            await TaskEx.Delay(1000);
            lblResult.Text = "Assíncrono";
        }

        protected async void btnIniciarAssincrono_Click(object sender, EventArgs e)
        {
            await ExecutarAssincronos();
        }

Help me plis?

Answer 5

1) What do you expect to see?

2) What are you seeing?

      -Steve

---

Programming blog: http://nitoprograms.blogspot.com/
  Including my TCP/IP .NET Sockets FAQ
  and How to Implement IDisposable and Finalizers: 3 Easy Rules
Microsoft Certified Professional Developer

How to get to Heaven according to the Bible

Answer 6

1- after the click of a button IniciarAssincrona sleep will turn and me an while I click the button to fill my IniciarSincrona label with the string "Síncrono"

2- Currently IniciarAssincrona I click the button and then click the button IniciarSincrona the first execution is halted for the second run, they need to be independent.

Code:

protected void btnIniciarSincrono_Click(object sender, EventArgs e)
        {
            ExecutarSincronos();
        }

        private void ExecutarSincronos()
        {
            txtSincrono.Text = "Síncrono";
        }

        private async Task sleep()
        {
            await TaskEx.Delay(5000);
        }

        private async Task ExecutarAssincronos()
        {
            txtAssincrono.Text = "teste";
            await sleep();
            await PassoTresAssincrono();
            
        }

        private async Task PassoTresAssincrono()
        {
            await TaskEx.Delay(1000);
            lblResult.Text = "Assíncrono";
        }

        protected async void btnIniciarAssincrono_Click(object sender, EventArgs e)
        {
            await ExecutarAssincronos();
        }

Answer 7

Cheers mate, this really helped me out. Was scratching my head for a while when thread sleep caused my app to simply freeze.