文件copy的多线程问题,来者都有分，不够再加~~~

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using System.Threading;



namespace threadfilecopy

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }



        private void Form1_Load(object sender, EventArgs e)

        {

            dFileCopy tr = new dFileCopy(FileCopy);

            tr.BeginInvoke(@"c:\DXperience-7.3.7.exe", @"c:\b.exe", null , null);

        }



        delegate void dFileCopy(string sourceFileName, string destFileName);

        void FileCopy(string sourceFileName, string destFileName)

        {

            if (!System.IO.File.Exists(sourceFileName))

                new System.IO.IOException("File not exist.");



            System.IO.FileInfo fi = new System.IO.FileInfo(sourceFileName);

            System.IO.StreamReader sr = new System.IO.StreamReader(sourceFileName);



            using (System.IO.StreamWriter sw = new System.IO.StreamWriter(destFileName, false))

            {

                for (int i = 0; i < fi.Length; i++)

                {

                    sw.Write(sr.Peek());

                    if (i % (fi.Length / 100) == 0)

                        SetProcess(i / (fi.Length / 100));

                }

            }



        }



        delegate void process(double value);

        void SetProcess(double value)

        {

            if (this.InvokeRequired)

                this.Invoke(new process(SetProcess), value);

            else

                this.Text = value.ToString() + " %";



            if (value > 0)

            { }

        }



    }

}