最近由于工作的需要，开始接触c#，发现c#语言真的很强大，本人java出身，学起来没什么难度，但是做网络爬虫的时候遇到一个问题，就是c#的progressbar （进度条）
下面是我参考的内容，希望能有帮助：
原文摘自：http://www.cnblogs.com/kingwangzhen/archive/2010/01/23/1654925.html
http://www.cnblogs.com/tlnature/archive/2009/02/27/1399298.html
界面：
1 namespace ProgressBar_01 2 { 3 partial class Form1 4 { 5 /// 6 /// 必需的设计器变量。 7 /// 8 private System.ComponentModel.IContainer components = null; 9 10 /// 11 /// 清理所有正在使用的资源。 12 /// 13 /// 如果应释放托管资源，为 true；否则为 false。 14 protected override void Dispose(bool disposing) 15 { 16 if (disposing && (components != null)) 17 { 18 components.Dispose(); 19 } 20 base.Dispose(disposing); 21 } 22 23 #region Windows 窗体设计器生成的代码 24 25 /// 26 /// 设计器支持所需的方法 - 不要 27 /// 使用代码编辑器修改此方法的内容。 28 /// 29 private void InitializeComponent() 30 { 31 this.progressBar1 = new System.Windows.Forms.ProgressBar(); 32 this.label1 = new System.Windows.Forms.Label(); 33 this.button1 = new System.Windows.Forms.Button(); 34 this.label2 = new System.Windows.Forms.Label(); 35 this.label3 = new System.Windows.Forms.Label(); 36 this.SuspendLayout(); 37 // 38 // progressBar1 39 // 40 this.progressBar1.Location = new System.Drawing.Point(157, 142); 41 this.progressBar1.Name = "progressBar1"; 42 this.progressBar1.Size = new System.Drawing.Size(365, 35); 43 this.progressBar1.TabIndex = 0; 44 this.progressBar1.Click += new System.EventHandler(this.progressBar1_Click); 45 // 46 // label1 47 // 48 this.label1.AutoSize = true; 49 this.label1.Location = new System.Drawing.Point(98, 153); 50 this.label1.Name = "label1"; 51 this.label1.Size = new System.Drawing.Size(41, 12); 52 this.label1.TabIndex = 1; 53 this.label1.Text = "进度："; 54 this.label1.Click += new System.EventHandler(this.label1_Click); 55 // 56 // button1 57 // 58 this.button1.Location = new System.Drawing.Point(157, 217); 59 this.button1.Name = "button1"; 60 this.button1.Size = new System.Drawing.Size(75, 23); 61 this.button1.TabIndex = 2; 62 this.button1.Text = "提交"; 63 this.button1.UseVisualStyleBackColor = true; 64 this.button1.Click += new System.EventHandler(this.button1_Click); 65 // 66 // label2 67 // 68 this.label2.AutoSize = true; 69 this.label2.Location = new System.Drawing.Point(480, 124); 70 this.label2.Name = "label2"; 71 this.label2.Size = new System.Drawing.Size(0, 12); 72 this.label2.TabIndex = 3; 73 // 74 // label3 75 // 76 this.label3.AutoSize = true; 77 this.label3.Location = new System.Drawing.Point(397, 124); 78 this.label3.Name = "label3"; 79 this.label3.Size = new System.Drawing.Size(77, 12); 80 this.label3.TabIndex = 4; 81 this.label3.Text = "进度百分比："; 82 this.label3.Click += new System.EventHandler(this.label3_Click); 83 // 84 // Form1 85 // 86 this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F); 87 this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; 88 this.ClientSize = new System.Drawing.Size(604, 368); 89 this.Controls.Add(this.label3); 90 this.Controls.Add(this.label2); 91 this.Controls.Add(this.button1); 92 this.Controls.Add(this.label1); 93 this.Controls.Add(this.progressBar1); 94 this.Name = "Form1"; 95 this.Text = "Form1"; 96 this.ResumeLayout(false); 97 this.PerformLayout(); 98 99 }100 101 #endregion102 103 private System.Windows.Forms.ProgressBar progressBar1;104 private System.Windows.Forms.Label label1;105 private System.Windows.Forms.Button button1;106 private System.Windows.Forms.Label label2;107 private System.Windows.Forms.Label label3;108 }109 } 
进度条处理：
1 using System; 2 using System.Collections.Generic; 3 using System.ComponentModel; 4 using System.Data; 5 using System.Drawing; 6 using System.Linq; 7 using System.Text; 8 using System.Windows.Forms; 9 10 namespace ProgressBar_0111 {12 public partial class Form1 : Form13 {14 public Form1()15 {16 InitializeComponent();17 }18 19 private void progressBar1_Click(object sender, EventArgs e)20 {21 22 }23 public void StartDownload()24 {25 Downloader downloader = new Downloader();26 downloader.onDownLoadProgress += new Downloader.dDownloadProgress(downloader_onDownLoadProgress);27 downloader.Start();28 }29 //同步更新UI30 void downloader_onDownLoadProgress(long total, long current)31 {32 if (this.InvokeRequired)33 {34 this.Invoke(new Downloader.dDownloadProgress(downloader_onDownLoadProgress), new object[] { total, current });35 long test = current + 1;36 label2.Text = test + "%";37 label2.Show();38 if (test == 100)39 {40 this.Close();41 MessageBox.Show("本次任务已完成\n 谢谢使用");42 }43 }44 else45 {46 this.progressBar1.Maximum = (int)total;47 this.progressBar1.Value = (int)current;48 }49 }50 public class Downloader51 {52 //委托53 public delegate void dDownloadProgress(long total, long current);54 //事件55 public event dDownloadProgress onDownLoadProgress;56 //开始模拟工作57 public void Start()58 {59 for (int i = 0; i < 100; i++)60 {61 if (onDownLoadProgress != null)62 onDownLoadProgress(100, i);63 System.Threading.Thread.Sleep(100);64 }65 }66 }67 68 private void button1_Click(object sender, EventArgs e)69 {70 //用子线程工作71 new System.Threading.Thread(new System.Threading.ThreadStart(StartDownload)).Start();72 }73 }74 } 运行实际效果：
1 private void btnRun_Click(object sender, EventArgs e) 2 { 3 btnRun.Enabled = false; 4 5 if (txtBoxTarget.Text.Equals(String.Empty) || txtBoxTimes.Text.Equals(String.Empty)) 6 { 7 MessageBox.Show("请输入连接的URL和连接次数！", "提示", 8 MessageBoxButtons.OK, MessageBoxIcon.Information); 9 return;10 }11 12 int length = Int32.Parse(txtBoxTimes.Text.Trim());13 string url = txtBoxTarget.Text.Trim();14 double process = 0;15 int show = 0;16 17 DateTime rightNow = DateTime.Now;18 DateTime end;19 TimeSpan interval;20 21 22 toolStripStatusLabel.Text = "连接中";23 progressBar.Visible = true;24 progressBar.Minimum = 0;25 progressBar.Maximum = length;26 27 for (int i = 1; i <= length; i++)28 {29 try30 {31 32 // 这两句是连接某个网页的。33 WebRequest myRequest = WebRequest.Create(url);34 WebResponse myResponse = myRequest.GetResponse();35 myResponse.Close();36 }37 catch38 {39 txtBoxReport.Text = "网络连接有误！";40 return;41 }42 43 progressBar.PerformStep();44 45 process = i / length;46 show = (int)process * 100;47 }48 49 progressBar.Visible = false;50 toolStripStatusLabel.Text = "已就绪";51 txtBoxReport.Text = "连接 " + url + " " + length + "次。";52 53 end = DateTime.Now;54 interval = end - rightNow;55 txtBoxReport.Text += "\r\n共耗时" + interval.TotalMilliseconds + "毫秒。";56 57 btnRun.Enabled = true;58 }
没有过多的讲解，因为这个我研究的不深，因为c#的牛人很多，但是我会把我的错误进行分享，以此为戒