Thread, listbox and an infinite loop [closed]

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Thread, listbox and an infinite loop [closed]

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#1 by (-2 votes)

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I try to make a windows desktop application in C # and what I'm trying to do is have a button that activates a thread that shows an infinite loop in a listbox that can be stopped with another button, I'm new to threads so I do not know how to start.

namespace WindowsFormsApp1

{ public partial class Form1: Form { public int counter = 0; public bool IsRunning = false; public List oThreads = new List ();

    public Form1()
    {
        InitializeComponent();
    }


    private void Form1_Load(object sender, EventArgs e)
    {
        //Thread oThread = new Thread(new ThreadStart(ImportStart));
        //oThread.SetApartmentState(ApartmentState.STA);
        //oThread.Name = "Main Thread";
        //oThread.IsBackground = true;
        //oThread.Start();

    }

    private void button1_Click(object sender, EventArgs e)
    {
        // IsRunning = !IsRunning;


        Thread t = new Thread(new ThreadStart(ImportStart));
        t.SetApartmentState(ApartmentState.STA);
        t.Name = "t" + (oThreads.Count() + 1).ToString();
        t.IsBackground = true;
        t.Start();

        oThreads.Add(t);
    }

    public void ImportStart()
    {

        while (true)
        {
            // if (IsRunning)
            //{
            this.Invoke(new MethodInvoker(delegate () {
                //if (counter < 100)
                //    label1.Text = (counter++).ToString();
                label1.Text = oThreads.Count().ToString();

                //listBox1.Items.Add(oThreads.Count().ToString());
                //listBox1.Refresh();
                //listBox1.DoubleClick += new EventHandler(ListBox1_DoubleClick);

            }));
            //   Thread.Sleep(500);
            //}
            Thread.Sleep(100);
        }

    }

    private void button2_Click(object sender, EventArgs e)
    {
        if (oThreads.Count > 0)
        {
            oThreads.Last().Abort();
            oThreads.RemoveAt(oThreads.Count() - 1);
        }
    }

    private void ListBox1_DoubleClick(object sender, EventArgs e)
    {
        if (listBox1.SelectedItem != null)
        {
            if (oThreads.Count > 0)
            {
                for (int n = oThreads.Count() -1; n>= 0; n--)
                {
                    string removelistitem = listBox1.SelectedItem.ToString();
                    if (listBox1.Items[n].ToString().Contains(removelistitem))
                    {

                        oThreads.Last().Abort();
                        oThreads.RemoveAt(oThreads.Count() - 1);

                    }
                }

                //oThreads.Last().Abort();
                //oThreads.RemoveAt(oThreads.Count() - 1);
            }
        }
    }
}

}

c# bucles hilos listbox

asked by Jonathan Garcia 16.07.2018 в 21:52

source

1 answer

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score -2 · Accepted Answer

how to make an infinite cycle

 bool loop = false;
 public void IniciaMetodoInfinito(object sender, DoWorkEventArgs e) //thread secundario 
 {
      loop = true;
      while (loop == true)
      {
      //esto se repite infinitametne
      }
 }

 public void DetieneMetodoInfinito()//thread principal
 {
      loop = false;
 }

Now, to invoke the secondary thread there are many methods, but I think the simplest is to call a backgroundWorker to execute "StartMetaInfinito ()"

  click_botonIniciar()
  { 
    var worker = new System.ComponentModel.BackgroundWorker();
    worker.DoWork += IniciaMetodoInfinito;
    worker.RunWorkerAsync();
 }
 click_botonDetener()
 { 
   DetieneMetodoInfinito()
 }