c# progressBar使用,该如何解决

c# progressBar使用
我要上传一个大文件，由于时间很长，不知道什么时候结束。C#中怎么样使用progressBar能够知道现在上传文件的进度呢？

[解决办法]

C# code

//一个模拟.....也可能不适合你,不知道你的发送文件代码是怎么写的    private void button3_Click(object sender, EventArgs e)    {        Thread thread = new Thread(new ThreadStart(Send));        thread.Start();    }    private void Send()    {      int i = 0;      while (i <= 100)      {         //显示进度 信息        this.ShowPro(i);        //循环发生文件         //模拟的         i++; //模拟发送多少        Thread.Sleep(100);      }      Thread.CurrentThread.Abort();    }    private void ShowPro(int value)    {      if (this.InvokeRequired)      {        this.Invoke(new ProgressBarShow(ShowPro), value);      }      else      {        this.progressBar1.Value = value;        this.label1.Text = value + "%";      }    }
[解决办法]
前几天刚用过,修改了一下,参考了一位前辈的例子
http://blog.mylover.cn/2009/02/post-3.html
C# code
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 TestProgressBar{    public partial class TestForm : Form    {        //线程开始的时候调用的委托        private delegate void maxValueDelegate(WordEventArgs e);        //线程执行中调用的委托        private delegate void nowValueDelegate(WordEventArgs e);        //线程执行结束调用的委托        private delegate void endValueDelegate(WordEventArgs e);        public TestForm()        {            InitializeComponent();        }        private void btn_Test_Click(object sender, EventArgs e)        {            Worker worker = new Worker();            /// 订阅事件            worker.OnStartWorkEvent += new WorkEventHandler(this.OnStartWorkEventHandler);            worker.OnDoWorkEvent += new WorkEventHandler(this.OnDoWorkEventHandler);            worker.OnEndWorkEvent += new WorkEventHandler(this.OnEndWorkEventHandler);            Thread thread = new Thread(new ThreadStart(worker.Work));            thread.Start();          }        /// <summary>        /// 线程开始事件,设置进度条最大值,需要一个委托来替我完成        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        void OnStartWorkEventHandler(object sender, WordEventArgs e)        {                        maxValueDelegate max = new maxValueDelegate(SetMaxValue);            this.Invoke(max, e);        }        /// <summary>        /// 线程执行中的事件,设置进度条当前进度,需要一个委托来替我完成        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        void OnDoWorkEventHandler(object sender, WordEventArgs e)        {                       nowValueDelegate now = new nowValueDelegate(SetNowValue);            this.Invoke(now, e);        }        /// <summary>        /// 线程完成事件        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        void OnEndWorkEventHandler(object sender, WordEventArgs e)        {            endValueDelegate end = new endValueDelegate(SetEndValue);            this.Invoke(end, e);        }        /// <summary>        /// 被委托调用,专门设置进度条最大值的        /// </summary>        /// <param name="maxValue"></param>        private void SetMaxValue(WordEventArgs e)        {            this.probar_Test.Maximum = e.Position;            lbl_Info.Text = e.Info;        }        /// <summary>        /// 被委托调用,专门设置进度条当前值的        /// </summary>        /// <param name="nowValue"></param>        private void SetNowValue(WordEventArgs e)        {            this.probar_Test.Value = e.Position;            lbl_Info.Text = e.Info;        }        /// <summary>        /// 被委托调用,专门设置进度条结束后的处理        /// </summary>        /// <param name="nowValue"></param>        private void SetEndValue(WordEventArgs e)        {            this.probar_Test.Value = e.Position; ;            lbl_Info.Text = e.Info;            MessageBox.Show(e.Info);                   }    }}