UI线程同步

WINFORM开发中常用的UI线程同步相关代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading.Tasks;
using System.Threading;

namespace ThreadTestApp
{

    /// <summary>
    /// 线程同步测试
    /// </summary>
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnInvoke_Click(object sender, EventArgs e)
        {
            //1.直接调用
            OperateUI(DoSomeThing("直接调用"));

            //2.同步器调用
            var v2 = new Task<string>(() => DoSomeThing("同步器调用"));
            v2.Start();
            v2.ContinueWith((o) => { OperateUI(o.Result); }, CancellationToken.None,
                    TaskContinuationOptions.OnlyOnRanToCompletion, TaskScheduler.FromCurrentSynchronizationContext());

            //3.异步异常捕捉
            var v3 = new Task<string>(() => DoSomeThing("ThrowEx"));
            v3.Start();
            v3.ContinueWith((o) => { OperateUI(v3.Exception.InnerExceptions[0].Message); }, CancellationToken.None,
                    TaskContinuationOptions.OnlyOnFaulted, TaskScheduler.FromCurrentSynchronizationContext());

            //4.经典UI调用
            ThreadPool.QueueUserWorkItem((o) => { Classic(DoSomeThing("经典UI调用")); });

        }
   
        private void Classic(string v)
        {
            if (this.InvokeRequired) //需要找到一个调用控件
            {
                Action<string> a = new Action<string>(OperateUI);
                this.Invoke(a, new object[] { v });
            }
            else
            {
                OperateUI(v);
            }
        }

        private void OperateUI(string v)
        {

            tabDisplay.TabPages.Add(v);

            lblDisplay.Text = v;

            MessageBox.Show(v);

            this.Text = v;
        }



        private string DoSomeThing(string v)
        {
            if (v == "ThrowEx")
                throw new Exception("自定义异常");

            else
                return "[" + v + "]";
        }

    }
}