Watin AddDialogHandler method throwing null reference exception in FF - watin

Question

I'm trying to add ConfirmDialogHandler to dialog handler and i get NullReferenceException.
This happens on FF 3.6 with latest watin version, the same code works on IE7 and 8.
ConfirmDialogHandler confirmDialogHandler = new ConfirmDialogHandler();
browser.AddDialogHandler(confirmDialogHandler); // --> exception here
Any ideas?

Answer 1

Old Solution
Found the problem.
The DialogWatcher was not initialized when FF session was created added this line to watin code:
private void CreateFireFoxInstance(string url)
{
Logger.LogAction("Creating FireFox instance");
UtilityClass.MoveMousePoinerToTopLeft(Settings.AutoMoveMousePointerToTopLeft);
var clientPort = GetClientPort();
clientPort.Connect(url);
_ffBrowser = new FFBrowser(clientPort);
StartDialogWatcher(); // <-- Added line
WaitForComplete();
}
Please Note - This is the workaround
The provided solution didn't worked
This is my workaround:
I used AutoIt dll and handled the popups by my self, code sample:
using AutoItX3Lib;
public static void RunAutomaticEnterCommand(Session session)
{
var autoIt = GetPopupHandle();
autoIt.Send("{ENTER}");
Thread.Sleep(1000);
}
/// <summary>
/// Cancel the popup
/// For FF
/// </summary>
/// <param name="session"></param>
public static void RunAutomaticCancelCommand(Session session)
{
var autoIt = GetPopupHandle();
autoIt.Send("{TAB}");
autoIt.Send("{ENTER}");
Thread.Sleep(1000);
}
/// <summary>
/// Return the autoit popup handler
/// AutoIt is a script language, we using it to handle the firefox popups
/// </summary>
/// <returns></returns>
private static AutoItX3Class GetPopupHandle()
{
var autoIt = new AutoItX3Class();
autoIt.AutoItSetOption("WinTitleMatchMode", 2);
const string partialTitle = "The page at"; //the popup in Firefox starts with this text
autoIt.WinWait(partialTitle, "", 30);
string fullTitle = autoIt.WinGetTitle(partialTitle); //Get the whole popup title
autoIt.WinActivate(fullTitle); //Get focis to the popup
if (autoIt.WinWaitActive(fullTitle, "", 20) == 0)
{
reporter.Report("Failed to get the FireFox popup handle", false);
return autoIt;
}
return autoIt;
}