C# Task Cancel,CancellationTokenSource.IsCancellationRequested

2021-03-10 22:32

阅读:570

标签:date   event   div   cli   tcl   guid   thread   string   oid   

 public partial class Form1 : Form
    {
        CancellationTokenSource cts = new CancellationTokenSource();        
        public Form1()
        {
            InitializeComponent(); 
        }

        private void StartClick(object sender, EventArgs e)
        {             
            Task testTask = Task.Run(() =>
            {
                while (!cts.IsCancellationRequested)
                {
                    string str = $"{DateTime.Now.ToString("yyyyMMddHHmmssffff")},{Guid.NewGuid().ToString()}";
                    BeginInvoke(new Action(() =>
                    {
                        listBox1.Items.Add(str);
                    }));
                    Thread.Sleep(500);
                }
            }, cts.Token);
        }

        private void CancelClick(object sender, EventArgs e)
        {
            cts.Cancel();
            string str = "Task cancelled";
            listBox1.Items.Add(str);
        }
    }
public partial class Form1 : Form
    {
        CancellationTokenSource cts = new CancellationTokenSource();
        Liststring> lbList = new Liststring>();      
        public Form1()
        {
            InitializeComponent();
            listBox1.DataSource = lbList; 
        }

        private void StartClick(object sender, EventArgs e)
        {             
            Task testTask = Task.Run(() =>
            {
                while (!cts.IsCancellationRequested)
                {
                    string str = $"{DateTime.Now.ToString("yyyyMMddHHmmssffff")},{Guid.NewGuid().ToString()}";
                    BeginInvoke(new Action(() =>
                    {
                        lbList.Add(str);
                        listBox1.DataSource = null;
                        listBox1.DataSource = lbList;                                         
                    }));
                    Thread.Sleep(500);
                }
            }, cts.Token);
        }

        private void CancelClick(object sender, EventArgs e)
        {
            cts.Cancel();
            string str = "Task cancelled";
            BeginInvoke(new Action(() =>
            {
                lbList.Add(str);
                listBox1.DataSource = null;
                listBox1.DataSource = lbList;                                           
            }));
        }
    }

 

 public partial class Form1 : Form
    {
        CancellationTokenSource cts = new CancellationTokenSource();
        Liststring> lbList = new Liststring>();      
        public Form1()
        {
            InitializeComponent();
            listBox1.DataSource = lbList; 
        }

        private void StartClick(object sender, EventArgs e)
        {             
            Task testTask = Task.Run(() =>
            {
                while (!cts.IsCancellationRequested)
                {
                    AddContentToLBx();                    
                }
            }, cts.Token);
        }

        int i = 0;

        private void AddContentToLBx()
        {
            for(i=0;i10000;i++)
            {
                string str = $"i={i},{DateTime.Now.ToString("yyyyMMddHHmmssffff")},{Guid.NewGuid().ToString()}";
                BeginInvoke(new Action(() =>
                {
                    lbList.Add(str);
                    listBox1.DataSource = null;
                    listBox1.DataSource = lbList;
                }));
                Thread.Sleep(500);
                if (cts.IsCancellationRequested)
                {
                    break;
                }
            }
        }

        private void CancelClick(object sender, EventArgs e)
        {
            cts.Cancel();
            string str = $"i={i},Task cancelled";
            BeginInvoke(new Action(() =>
            {
                lbList.Add(str);
                listBox1.DataSource = null;
                listBox1.DataSource = lbList;                                           
            }));
        }
    }

 

C# Task Cancel,CancellationTokenSource.IsCancellationRequested

标签:date   event   div   cli   tcl   guid   thread   string   oid   

原文地址:https://www.cnblogs.com/Fred1987/p/12665044.html


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