System.__ComObject is returned when I use getAttribute

Question

I am running this code:

HtmlElement.GetAttribute("onClick")

To try and get access to the onClick attribute of that element, but all this returns is System.__ComObject. I don't know why this happens, all other GetAttribute calls return the actual string.

Thanks.

try next post http://stackoverflow.com/questions/6223840/how-to-get-actual-javascript-value-in-onclick-from-webbrowser-control — volody, Mar 14 '12 at 18:34
That's because onClick is an event, not a string. Consider using HtmlElement.Click instead, it isn't otherwise clear what you want to do with onClick. — Hans Passant, Mar 14 '12 at 19:09
When an element has "onClick = "blabla" " I want to get "blabla". — TheGateKeeper, Mar 14 '12 at 19:23

score 0 · Answer 1 · answered Oct 02 '13 at 09:37

First, you can try to determine type of the control; then cast your object to this type. Accessing properties of element is possible with this method.

For example, if your object is a "div" contains an "onclick" method, you must convert your com object to mshtml.HTMLDivElement (You must add assembly "mshtml.dll" into your project for using mshtml class); then you can look for "onclick" attribute in outerHTML property.

    if (doc.GetElementById("id-of-div").GetAttribute("onclick").Equals("System.__ComObject"))
    {
            mshtml.HTMLDivElement docCOM = (mshtml.HTMLDivElement)doc.GetElementById("id-of-div").DomElement;

            string onClickStr = docCOM.outerHTML.[some string or regex operations here];
    }

score -1 · Answer 2 · edited Nov 30 '21 at 10:36

-1

You need to use this code:

theElementCollection = WebBrowser1.Document.GetElementsByTagName("A")

For Each curElement As HtmlElement In theElementCollection
    MsgBox(curElement.DomElement.attributes("onclick").value.ToString)
Next

edited Nov 30 '21 at 10:36

Ihor Konovalenko

1,298
2
16
21

answered Nov 30 '21 at 06:31

Tho Dinh Ba

1

volody · Answer 3 · 2012-03-16T18:28:08.380

Sample code

Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
    WebBrowser1.Navigate("http://stackoverflow.com/questions/9707869/system-comobject-is-returned-when-i-use-getattribute")
End Sub

Private Sub WebBrowser1_DocumentCompleted(sender As Object, e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs) Handles WebBrowser1.DocumentCompleted
    Dim a As HtmlElement = WebBrowser1.Document.GetElementById("portalLink").FirstChild
    MsgBox(a.DomElement.attributes("onclick").value.ToString)
End Sub

System.__ComObject is returned when I use getAttribute

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