我无法从SHDOCvw.Internetexplorer即对象访问IE元素。以下是我的代码。
//Manipulating HTML element
HTMLDocument document = (HTMLDocument)ie.Document;
Console.WriteLine("Setting text box to google search text box");
IHTMLElement element = document.getElementById("lst-ib");
有什么建议吗？我得到的错误是
'((mshtml.HTMLDocumentClass)(document)).activeElement' threw an exception of type 'System.InvalidCastException'
尝试以下但得到同样的错误。
IHTMLDocument2 d = (IHTMLDocument2)ie.Document;
完整的代码在这里：
SHDocVw.InternetExplorer ie = null;
Console.WriteLine("\nLaunching an instance of IE");
Process p = Process.Start("iexplore.exe", www.google.com);
if (p == null)
throw new Exception("Could not launch IE");
Console.WriteLine("Process handle = " + p.MainWindowHandle.ToString());
SHDocVw.ShellWindows allBrowsers = new SHDocVw.ShellWindows();
Console.WriteLine("Number active browsers = " + allBrowsers.Count);
if (allBrowsers.Count == 0)
throw new Exception("Cannot find IE");
Console.WriteLine("Attaching to IE");
int i = 0;
while (i < allBrowsers.Count && ie == null)
{
InternetExplorer e = (InternetExplorer)allBrowsers.Item(i);
if (e.HWND == (int)p.MainWindowHandle)
ie = e;
++i;
}
if (ie == null)
throw new Exception("Failed to attach to IE");
HTMLDocument document = (HTMLDocument)ie.Document;
IHTMLDocument2 d = (IHTMLDocument2)ie.Document;
Console.WriteLine("Setting text box to google search text box");
IHTMLElement element = document.getElementById("lst-ib");
The above line is the one which throws the error:
"Unable to cast COM object of type 'mshtml.HTMLDocumentClass' to interface type 'mshtml.DispHTMLDocument'"