C# 多线程更新Processbar

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 temp
{
    delegate void SetValueCallback(int value);

    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Thread t = new Thread(new ThreadStart(Foo));

            t.Start();

        }
        private void Foo()
        {

            for (int i = 1; i <= 100; i++)
            {

                Thread.Sleep(100);

                SetProcessBarValue(i);

                SetLabelValue(i);

            }

        }

        private void SetLabelValue(int value)
        {

            // InvokeRequired required compares the thread ID of the

            // calling thread to the thread ID of the creating thread.

            // If these threads are different, it returns true.

            if (this.label1.InvokeRequired)
            {

                SetValueCallback d = new SetValueCallback(SetLabelValue);

                this.Invoke(d, new object[] { value });

            }

            else
            {

                this.label1.Text = value.ToString() + '%';

            }

        }

        private void SetProcessBarValue(int value)
        {

            // InvokeRequired required compares the thread ID of the

            // calling thread to the thread ID of the creating thread.

            // If these threads are different, it returns true.

            if (this.progressBar1.InvokeRequired)
            {

                SetValueCallback d = new SetValueCallback(SetProcessBarValue);

                this.Invoke(d, new object[] { value });

            }

            else
            {

                this.progressBar1.Value = value;

            }

        }

 

    }
}