等到WebBrowser控件的页面加载

Question

我使用C＃WebBrowswer控制和我有当页面没有加载当按下像“下一步”按钮的问题尚未程序试图进行，而是给了我一个空错误。

是否有一个函数让程序等待，直到页面完成加载？

我试图把程序中的while循环检查html页面的标题，但程序死机。喜欢的东西将冻结程序：

while(!webbrowser1.Document.Title.ToString().Equals("NextPageTitle")) 
    { 
    } 
    ::NextCommands:: 

---

它不工作，我想，和按钮“fblqf”不点击。但它不是返回空的错误..

public void button1_Click(object sender, EventArgs e) 
{ 



    webBrowser1.Document.GetElementById("q").SetAttribute("value", "חחח"); 
    webBrowser1.Document.GetElementById("btnK").InvokeMember("Click"); 
    webBrowser1.DocumentCompleted += webBrowser1_DocumentCompleted; 


} 
void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e) 
{ 
    // do the work you need to do now that that page has completed loading 
    webBrowser1.Document.GetElementById("fblqf").InvokeMember("Click"); 
} 

解决方案：

public void button1_Click(object sender, EventArgs e) 
{ 
    webBrowser1.Document.GetElementById("q").SetAttribute("value", "חחח"); 
    webBrowser1.Document.GetElementById("btnK").InvokeMember("Click"); 
    int x=0; 
    while (x==0) 
    { 
     System.Windows.Forms.Application.DoEvents(); 
     if(webBrowser1.Document.GetElementById("pnnext") != null) 
     break; 
    } 

    webBrowser1.Document.GetElementById("pnnext").InvokeMember("Click"); 
    webBrowser1.Document.GetElementById("q").Focus(); 
} 

Answer 1

我发现了一个简单的解决方案！

public void button1_Click(object sender, EventArgs e) 
{ 
    webBrowser1.Document.GetElementById("q").SetAttribute("value", "חחח"); 
    webBrowser1.Document.GetElementById("btnK").InvokeMember("Click"); 

    while (true) 
    { 
     System.Windows.Forms.Application.DoEvents(); 
     if(webBrowser1.Document.GetElementById("pnnext") != null) 
     break; 
    } 

    webBrowser1.Document.GetElementById("pnnext").InvokeMember("Click"); 
    webBrowser1.Document.GetElementById("q").Focus(); 
} 

Answer 2

您需要挂钩WebBrowswer.DocumentCompleted事件：

也许在你的构造函数或元素的onload：

webBrowser1.Document.GetElementById("q").SetAttribute("value", "חחח"); 
webBrowser1.DocumentCompleted += webBrowser1_DocumentCompleted; 
webBrowser1.Document.GetElementById("btnK").InvokeMember("Click"); 

然后你的活动看起来像这样：

void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e) 
{ 
    // do the work you need to do now that that page has completed loading 
}