通过委托更新UI(异步加载）

来自：http://blog.csdn.net/gongzhe2011/article/details/27351853

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

namespace Threaddemo1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        delegate void aa(string s);//创建一个代理

        private void Form1_Load(object sender, EventArgs e)
        {
            Thread newthread = new Thread(new ThreadStart(ttread));
            newthread.Start();
        }
        void ttread()
        {
            pri("77");
        }
        private delegate void ProgressBarShow(int i);
        private void pri(string p)
        {
            bool name = richTextBox1.InvokeRequired;
            //MessageBox.Show(name.ToString());
            if (!richTextBox1.InvokeRequired)//判断是否需要进行唤醒的请求，如果控件与主线程在一个线程内，可以写成if(!InvokeRequired)
            {
                Loadthread();
            }
            else
            {
             //   MessageBox.Show("不是同一个线程");
                aa a1 = new aa(pri);
                Invoke(a1, new object[] { p });//执行唤醒操作
            }
        }

        private void Loadthread()
        {
            string s = string.Empty;
            for (int b = 0; b < 10000; b++)
            {
                this.ShowPro(b);
                s += b.ToString();
            }
            //MessageBox.Show("同一线程内");
            LoadRichebox(s);
        }
        void send() {
            Thread.CurrentThread.Abort();
        }
        private void LoadRichebox(string s)
        {
            richTextBox1.Text = s;
        }
        private void ShowPro(int value)
        {
            if (this.InvokeRequired)
            {
                this.Invoke(new ProgressBarShow(ShowPro), value);
            }
            else
            {
                this.progressBar1.Value = value;
                this.label1.Text = value + "% Processing...";
            }
        }
    }
}