对于OnScroll创建事件处理程序，Web浏览器控件 [英] Create event handler for OnScroll for web browser control

问题描述

有没有人成功捕获鼠标滚动的事件在网络browerser成分？

我有两个Web浏览器控件我想在同一时间滚动。

但也有网络浏览器没有滚动的事件。

我想创建一个事件像下面这样？有没有人做过或见过这个？

 私人无效webCompareSQL_DocumentCompleted（对象发件人，WebBrowserDocumentCompletedEventArgs E）
 {
 Document.Window.AttachEventHandler（OnScroll）; 
} 
  

在这里，我会叫我的事件，并使用代码进行。

 私人无效windowEvents_OnScroll（）
 {
 INT非营利组织= GetScrollPos（webCompareSQL.Handle，（INT）ScrollBarType.SbVert） ; 
非营利组织<< = 16; 
 UINT wParam参数=（UINT）ScrollBarCommands.SB_THUMBPOSITION | （UINT）非营利组织; 
 SendMessage函数（WebPrevSQL.Handle，（INT）Message.WM_VSCROLL，新的IntPtr（wParam参数），新的IntPtr（0））; 
} 
  

我发现这个代码，但不知道如何使用它。它的一个事件。

  webCompareSQL.Document.Window.Scroll 
  

解决方案

我能够如下得到这个工作。这个例子假定两个Web浏览器控件导航到相同的URL。我也是，除了垂直同步水平滚动条 - 这可以如果不需要它可以省略

  webBrowser1.DocumentCompleted 
 + =新WebBrowserDocumentCompletedEventHandler（webBrowser1_DocumentCompleted）; 
 webBrowser2.DocumentCompleted 
 + =新WebBrowserDocumentCompletedEventHandler（webBrowser2_DocumentCompleted）; 
 
 NavigateToPage（www.google.com）; 
 
 .... 
 
私人无效NavigateToPage（字符串URL）
 {
 WebBrowser1.Navigate时（URL）; 
 webBrowser2.Navigate（URL）; 
} 
 
私人无效webBrowser1_DocumentCompleted（对象发件人，WebBrowserDocumentCompletedEventArgs E）
 {
 webBrowser1.Document.Window.AttachEventHandler（onscroll，OnScrollEventHandler1）; 
} 
 
私人无效webBrowser2_DocumentCompleted（对象发件人，WebBrowserDocumentCompletedEventArgs E）
 {
 webBrowser2.Document.Window.AttachEventHandler（onscroll，OnScrollEventHandler2）; 
} 
 
公共无效OnScrollEventHandler1（对象发件人，EventArgs五）
 {
 webBrowser2.Document.GetElementsByTagName（HTML）[0] .ScrollTop 
 = webBrowser1.Document.GetElementsByTagName（HTML）[0] .ScrollTop; 
 webBrowser2.Document.GetElementsByTagName（HTML）[0] .ScrollLeft 
 = webBrowser1.Document.GetElementsByTagName（HTML）[0] .ScrollLeft; 
} 
 
公共无效OnScrollEventHandler2（对象发件人，EventArgs五）
 {
 webBrowser1.Document.GetElementsByTagName（HTML）[0] .ScrollTop 
 = webBrowser2.Document.GetElementsByTagName（HTML）[0] .ScrollTop; 
 webBrowser1.Document.GetElementsByTagName（HTML）[0] .ScrollLeft 
 = webBrowser2.Document.GetElementsByTagName（HTML）[0] .ScrollLeft; 
} 
  

我注意到的如何检索.NET WebBrowser控件的滚动条的位置，与这种操作

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

不工作。我可以证实，这绝对作品在我的机器上，因此，如果这个代码不上你，我可以考虑的选择工作。

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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