WebBrowser控件已经变得奇怪了

Question

  

可能重复：
  How to use WebBrowser control DocumentCompleted event in C#?

有人能告诉我为什么DocumentCompleted事件会发生3次???

我怎么知道该文件真的已被下载？

（我使用了一些页面来测试有很多jQuery。）

谢谢！

var webBrowser1 = new WebBrowser
                {
                    Padding = new Padding(0),
                    Margin = new Padding(0),
                    Dock = DockStyle.Fill,
                    Url = url,
                    TabStop = false,
                    ScriptErrorsSuppressed = true,
                    IsWebBrowserContextMenuEnabled = false
                };
                webBrowser1.Navigated +=  (d1,d2) => 
                {
                    Debug.WriteLine("Navigated " + DateTime.Now.TimeOfDay.ToString());
                };
                webBrowser1.DocumentCompleted += (d1, d2) => 
                {
                    Debug.WriteLine("DocumentCompleted " + DateTime.Now.TimeOfDay.ToString());                
                };


                form.Controls.Add(webBrowser1);
                form.Show();

LOG：

导航09：40：40.1807403 导航09：40：44.7270004 DocumentCompleted 09：40：44.7300005 导航09：40：46.5791063 DocumentCompleted 09：40：46.5821065 导航09：40：50.1113083 DocumentCompleted 09：40：50.7133428 DocumentCompleted 09：40：50.7233433

Answer 1

我在这里找到了一个好方法

How to use WebBrowser control DocumentCompleted event in C#?

 webBrowser1.DocumentCompleted += (d1, d2) => 
                {


                    string urlCurrent = d2.Url.ToString();
                    var browser = (WebBrowser)d1;

                    if (!(urlCurrent.StartsWith("http://") || urlCurrent.StartsWith("https://")))
                    {
                        // in AJAX     
                    }
                    if (d2.Url.AbsolutePath != browser.Url.AbsolutePath)
                    {
                        // IFRAME           
                    }
                    else
                    {
                        // REAL DOCUMENT COMPLETE

                        Debug.WriteLine("DocumentCompleted " + DateTime.Now.TimeOfDay.ToString());
                    }

                };