CODEWITHSUNDEEP
c#multithreading
Ali Imran
Ali Imran

Reputation: 686

Block UI thread and not display the label message

I have the following Thread method:

public void messageDelay() 
{
    Thread.Sleep(5000); 
}

But when I call it, it hand the UI interface and I can not done any operation until the thread is finished.

private  void Porcessing_Click(object sender, EventArgs e)
{   
    label1.Text = "start under process..";
    messageDelay();
    label1.Text = "Result";
}

This is my main method. Any idea whats wrong I do?

Upvotes: 0

Views: 83

Answers (2)

Salah Akbari
Salah Akbari

Reputation: 39956

You need to use Asynchronous programming in this case. It is essential for activities that are potentially blocking, such as yours:

private async void Porcessing_Click(object sender, EventArgs e)
{
    label1.Text = "start under process..";
    await messageDelay();
    label1.Text = "Result";
}

public async Task messageDelay()
{
    await Task.Delay(5000);
}

Note the use of async all the way down. Check this also https://blog.stephencleary.com/2012/07/dont-block-on-async-code.html

Upvotes: 2

Tunduk
Tunduk

Reputation: 26

You can use BackgroundWorker. This class create another thread, so UI thread will not block. For example:

private  void Porcessing_Click(object sender, EventArgs e)
{
    var worker = new BackgroudWorker(); 
    label1.Text = "start under process..";
    worker.DoWork+=BackgroudAction;
    worker.RunWorkerCompleted+=BackgroudActionEnd;
    worker.RunWorkerAsync();
}
private void BackgroudAction(object sender, DoWorkEventArgs e)
{
    Thread.Sleep(5000);
}

private void BackgroudActionEnd( object sender,RunWorkerCompletedEventArgs e)
{
    label1.Text="Result";
}

Upvotes: 0

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