C# WinForm跨线程访问控件

using System;
using System.Threading;
using System.Windows.Forms;

namespace
{
    public class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private delegate void ControlEventHandler(string str);
        private Worker worker = new Worker();

        private void Form1_Load(object sender, EventArgs e)
        {
            this.worker.MessagingEvent += this.Worker_MessagingEvent;
        }

        private void Worker_MessagingEvent(string message)
        {
            //检查是否需要跨线程，如果需要，将方法加入委托，如果不需要直接执行方法。
            if (this.textBox1.InvokeRequired) 
            {
                ControlEventHandler controlEventHandler = new ControlEventHandler(Worker_MessagingEvent);
                this.textBox1.Invoke(controlEventHandler, new object[] { message });
            }
            else
            {
                this.textBox1.Text = message;
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //创建线程，避免堵塞GUI线程。
            this.NewThread();
        }

        private void NewThread()
        {
            //创建线程，避免堵塞GUI线程。
            ThreadStart ts = new ThreadStart(Work);
            Thread t = new Thread(ts);
            t.Start();
        }

        private void Work()
        {
            //在新的线程中，需要执行的方法。
            this.worker.Work();
        }
    }



    public class Worker
    {
        public event Messaging MessagingEvent;
        public delegate void Messaging(string message);

        public void Work()
        {
            // TODO...
            MessagingEvent("Hello World!");
        }
    }
}