为OnScroll创建Web浏览器控件的事件处理程序 [英] Create event handler for OnScroll for web browser control

问题描述

我有两个Web浏览器控件，我想在同一时间滚动。

但是没有网页浏览器的滚动事件。

我想创建一个事件下面这样的东西？有没有以前做过或看过这个？

  private void webCompareSQL_DocumentCompleted（object sender，WebBrowserDocumentCompletedEventArgs e）
 {
 Document.Window.AttachEventHandler（OnScroll）; 
} 
  

这里我将打电话给我的事件并继续执行代码。

  private void windowEvents_OnScroll（）
 {
 int nPos = GetScrollPos（webCompareSQL.Handle，（int）ScrollBarType.SbVert） ; 
 nPos<< = 16; 
 uint wParam =（uint）ScrollBarCommands.SB_THUMBPOSITION | （UINT）非营利组织; 
 SendMessage（WebPrevSQL.Handle，（int）Message.WM_VSCROLL，new IntPtr（wParam），new IntPtr（0））; 
} 
  

我找到这个代码，但不知道如何使用它。它的一个事件。

  webCompareSQL.Document.Window.Scroll 
  

解决方案

我能够得到这样的工作如下。此示例假设两个Web浏览器控件正在导航到相同的Url。我也同步水平滚动条，除了垂直之外 - 如果不需要，这可以省略。

  webBrowser1.DocumentCompleted 
 + = new WebBrowserDocumentCompletedEventHandler（webBrowser1_DocumentCompleted）; 
 webBrowser2.DocumentCompleted 
 + = new WebBrowserDocumentCompletedEventHandler（webBrowser2_DocumentCompleted）; 
 
 NavigateToPage（www.google.com）; 
 
 .... 
 
 private void NavigateToPage（string url）
 {
 webBrowser1.Navigate（url）; 
 webBrowser2.Navigate（url）; 
} 
 
 private void webBrowser1_DocumentCompleted（object sender，WebBrowserDocumentCompletedEventArgs e）
 {
 webBrowser1.Document.Window.AttachEventHandler（onscroll，OnScrollEventHandler1）; 
} 
 
 private void webBrowser2_DocumentCompleted（object sender，WebBrowserDocumentCompletedEventArgs e）
 {
 webBrowser2.Document.Window.AttachEventHandler（onscroll，OnScrollEventHandler2）; 
} 
 
 public void OnScrollEventHandler1（object sender，EventArgs e）
 {
 webBrowser2.Document.GetElementsByTagName（HTML）[0] .ScrollTop 
 = webBrowser1.Document.GetElementsByTagName（HTML）[0] .ScrollTop; 
 webBrowser2.Document.GetElementsByTagName（HTML）[0] .ScrollLeft 
 = webBrowser1.Document.GetElementsByTagName（HTML）[0] .ScrollLeft; 
} 
 
 public void OnScrollEventHandler2（object sender，EventArgs e）
 {
 webBrowser1.Document.GetElementsByTagName（HTML）[0] .ScrollTop 
 = webBrowser2.Document.GetElementsByTagName（HTML）[0] .ScrollTop; 
 webBrowser1.Document.GetElementsByTagName（HTML）[0] .ScrollLeft 
 = webBrowser2.Document.GetElementsByTagName（HTML）[0] .ScrollLeft; 
} 
  

我在如何检索.NET中的webbrowser控件的滚动条位置，相关对此操作

  webBrowser1.Document.GetElementsByTagName（HTML）[0] .ScrollTop 
  

不工作。我可以确认这是绝对适用于我的机器，所以如果这段代码在你的工作不起作用，我可以看看替代品。

Has any one successfully trapped the event of mouse scroll in a web browerser component?

I have two web browser controls i would like to scroll at the same time.

But there are no scroll events for web browsers.

I would like to create an event something like this below? has any one done or seen this before?

 private void webCompareSQL_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
                Document.Window.AttachEventHandler("OnScroll");            
        }

Here i would call my event and proceed with the code.

private void windowEvents_OnScroll()
{
int nPos = GetScrollPos(webCompareSQL.Handle, (int)ScrollBarType.SbVert); 
nPos <<= 16;
uint wParam = (uint)ScrollBarCommands.SB_THUMBPOSITION | (uint)nPos;
SendMessage(WebPrevSQL.Handle, (int)Message.WM_VSCROLL, new IntPtr(wParam), new IntPtr(0));        
}

I have found this code but don't know how to use it. its an event.

webCompareSQL.Document.Window.Scroll

解决方案

I was able to get this working as follows. This example assumes that both web browser controls are navigating to the same Url. I am also syncing the horizontal scrollbar in addition to the vertical - this can be omitted if it is not required.

webBrowser1.DocumentCompleted
    += new WebBrowserDocumentCompletedEventHandler(webBrowser1_DocumentCompleted);
webBrowser2.DocumentCompleted
    += new WebBrowserDocumentCompletedEventHandler(webBrowser2_DocumentCompleted);

NavigateToPage("www.google.com");

....

private void NavigateToPage(string url)
{
    webBrowser1.Navigate(url);
    webBrowser2.Navigate(url);
}

private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
    webBrowser1.Document.Window.AttachEventHandler("onscroll", OnScrollEventHandler1);
}

private void webBrowser2_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
    webBrowser2.Document.Window.AttachEventHandler("onscroll", OnScrollEventHandler2);
}

public void OnScrollEventHandler1(object sender, EventArgs e)
{           
    webBrowser2.Document.GetElementsByTagName("HTML")[0].ScrollTop
        = webBrowser1.Document.GetElementsByTagName("HTML")[0].ScrollTop;
    webBrowser2.Document.GetElementsByTagName("HTML")[0].ScrollLeft
        = webBrowser1.Document.GetElementsByTagName("HTML")[0].ScrollLeft;
}

public void OnScrollEventHandler2(object sender, EventArgs e)
{
    webBrowser1.Document.GetElementsByTagName("HTML")[0].ScrollTop
        = webBrowser2.Document.GetElementsByTagName("HTML")[0].ScrollTop;
    webBrowser1.Document.GetElementsByTagName("HTML")[0].ScrollLeft
        = webBrowser2.Document.GetElementsByTagName("HTML")[0].ScrollLeft;
} 

I note your comment in How to retrieve the scrollbar position of the webbrowser control in .NET, relating to this operation

webBrowser1.Document.GetElementsByTagName("HTML")[0].ScrollTop

not working. I can confirm that this definitely works on my machine, so if this code does not work on yours I can look into alternatives.

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