C# 显示webBrowser页面加载进度

 1private   void   Form1_Load(object   sender,   EventArgs   e)
 2                {
 3                        Uri   url   =   new   Uri( "http://www.163.com ");
 4                        webBrowser1.Url   =   url;
 5                        webBrowser1.ProgressChanged+=new   WebBrowserProgressChangedEventHandler(webBrowser1_ProgressChanged);
 6                }
 7
 8                private   void   webBrowser1_ProgressChanged(object   sender,   WebBrowserProgressChangedEventArgs   e)
 9                {
                       
                        processBar.Visible   =   true;
                        if   ((e.CurrentProgress   >   0)   &&   (e.MaximumProgress   >   0))
                        {
                                processBar.Maximum   =Convert.ToInt32(   e.MaximumProgress);
                                processBar.Step   =   Convert.ToInt32(e.CurrentProgress);
                                processBar.PerformStep();
                        }
                        else   if   (webBrowser1.ReadyState   ==   WebBrowserReadyState.Complete)
                        {
                                processBar.Value   =   0;
                                processBar.Visible   =   false;
                        }
                }