public partial class _Default : System.Web.UI.Page
{
private void beginProgress()
{
//根据ProgressBar.htm显示进度条界面
string templateFileName = Path.Combine(Server.MapPath("."),"ProgressBar.htm");
StreamReader reader = new StreamReader(@templateFileName,System.Text.Encoding.GetEncoding("GB2312"));
string html = reader.ReadToEnd();
reader.Close();
Response.Write(html);
Response.Flush();
}

private void setProgress(int percent)
{
string jsBlock = "";
Response.Write(jsBlock);
Response.Flush();
}

private void finishProgress()
{
string jsBlock = "";
Response.Write(jsBlock);
Response.Flush();
}

private void Page_Load(object sender,System.EventArgs e)
{
beginProgress();

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

  //此处用线程休眠代替实际的操作，如加载数据等
  System.Threading.Thread.Sleep(50);
}

finishProgress(); 

}
}