Question

I’m developing automation program using winforms webbrowser control. I am able to get the htmlelement at the first few web pages. But i’m unable to get the htmlelement from certain pages and i’m using the same method like what i have done for the first few web pages (The few first pages htmlelement are retrieved successfully).

        HtmlElement createButton = this.extendedWebBrowser2.Document.GetElementById("createButton");
        HtmlElement textArea = this.extendedWebBrowser2.Document.GetElementById("query");
        HtmlElement filename = this.extendedWebBrowser2.Document.GetElementById("filename");
        HtmlElement cancelBtn = this.extendedWebBrowser2.Document.GetElementById("cancelBtn");

it returned null and i have no idea why it return null althought the elements exist at the pages. Why and what to do so i can detect the html element? What kind of reasons can cause it is unable to be detected?

Answer 1

The reason of unable to get the Html Elements is because the Html Elements are embedded in the FrameSet. To access the FrameSet :

HtmlWindow docWindow = extendedWebBrowser2.Document.Window;

foreach (HtmlWindow frameWindow in docWindow.Frames)
{
  implementation code...
}