C# 多线程更新进度条progressBar控件的代码一例

C#进度条的示例代码。

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
     //http://www.jbxue.com
            {
                this.progressBar1.Value = value;
            }
        }
    }
}

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