c# winform 实现多线程

来源：互联网发布：网络教育没拿到学位证编辑：程序博客网时间：2024/05/22 02:17
UI界面就一个label一个button，
点击button让label的值改变
using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.Collections;using System.Threading;using System.Text.RegularExpressions;using System.Net;namespace TestThread{               public partial class Form1 : Form        {            public delegate void treeinvoke(int i);            int num1 = 0;            int num2 = 10000;            public Form1()            {                InitializeComponent();            }            private void button1_Click(object sender, EventArgs e)            {                Console.WriteLine("AAA");                for (int i = 0; i < 5000; i++)                {                    ThreadPool.QueueUserWorkItem(startupdate, i);                }                Console.WriteLine("BBB");            }            private delegate void updateui();            private void TimeEvent(object source, System.Timers.ElapsedEventArgs e)            {                this.BeginInvoke(new updateui(upui));            }            private void upui()            {                label1.Text = num1.ToString() + "/" + num2.ToString();            }            private void startupdate(object c)            {                System.DateTime dt = DateTime.Now;                Console.WriteLine("CCC");                UpdateTreeView(int.Parse(c.ToString()));                Console.WriteLine("DDD");            }            private void UpdateTreeView(int j)            {                //反正这里执行耗时间操作Start                try                {                    string strPageData = GetHttp("http://news.163.com/rank/", Encoding.GetEncoding("GB2312"));                    this.BeginInvoke(new updateui(upui));//这里更新UI                    Console.WriteLine(j.ToString());                    num1 = j;                }                catch (Exception ex)                {                }                //反正这里执行耗时间操作End            }            public static string GetHttp(string url, Encoding encode)            {                string strResult;                try                {                    WebClient client = new WebClient();                    client.Encoding = encode;                    strResult = client.DownloadString(url);                }                catch                {                    strResult = "";                }                return strResult;            }        }    }
引用 http://bbs.csdn.net/topics/390577421
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