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...";

            }

        }

    }

}