How to retrieve the scrollbar position of the webbrowser control in .NET

Question

I tried using webBrowser1.Document.Body.ScrollTop and webBrowser1.Document.Body.ScrollLeft, but they don't work. They always return 0 and I can't access webBrowser1.Document.documentElement.ScrollTop and .ScrollLeft.

Answer 1

OK, I solved it:

Dim htmlDoc As HtmlDocument = wb.Document
Dim scrollTop As Integer = htmlDoc.GetElementsByTagName("HTML")(0).ScrollTop

Answer 2

To actually scroll, we found that the ScrollIntoView method worked nicely. For example, to scroll to the top-left of the page.

 this.webBrowser.Document.Body.FirstChild.ScrollIntoView(true);

However, we were not successful in actually getting the scroll position (that said, we didn't spend long trying). If you are in control of the HTML content, you might consider using some javascript to copy the scroll position into a hidden element and then read that value out using the DOM.

ScrollTop and ScrollLeft merely allow an offset to be provided between the boundary of an element and its content. There appears to be no way to manipulate the scroll by those values. Instead, you have to use ScrollIntoView.

Answer 3

For anyone interested, here's the C# code equivalent to Marc's answer:

System.Windows.Forms.HtmlDocument htmlDoc = webBrowser.Document;
if (htmlDoc != null)
{
    int scrollTop = htmlDoc.GetElementsByTagName("HTML")[0].ScrollTop;
    int scrollLeft = htmlDoc.GetElementsByTagName("HTML")[0].ScrollLeft;
}

Answer 4

I was able to query the scroll position using this

        if (this.webBrowser.Document != null)
        {
            int scrollPosition = this webBrowser.Document.Body.ScrollTop;                
        }