Question

TCppWebBrowser Click button on page

Asked by: TopKah

Okay I have managed  to obtain the IHTMLDocument2 from the Web Browser and click a button,  but after clicking the button I got a confirmation message coming from a script and I have to response to .
How can I response or simulate the click of this message or execute it on the page with response value.

 This is the web form source :
input type="submit" name="Button1" value="LogOut"
 onclick="return confirm(" Are you Sure you want to logout ?");" id="Button1" 
 
 
 
and this is my source code to press the button :
 
void __fastcall TForm1::Button3Click(TObject *Sender)
{
	PresstheButton("Button1", 0);
}
 
void PresstheButton(String FieldName, int Option)
{
	// Obtain the IHTMLDocument2 from the Web Browser
	TComInterface<IHTMLDocument2>PageDoc;
	Form1->CppWebBrowser1->Document->QueryInterface
		(IID_IHTMLDocument2, (LPVOID*) & PageDoc);
 
	if (PageDoc)
	{
		// Obtain a list of all the elements
		TComInterface<IHTMLElementCollection>All;
		PageDoc->get_all(&All);
		if (All)
		{
			// Get the first element i.e. TVariant(0) with the given FieldName
			TComInterface<IDispatch>Disp;
			All->item(TVariant(WideString(FieldName)), TVariant(Option), &Disp);
 
			if (Disp)
			{
				TComInterface<IHTMLInputElement>InputElement;
				Disp->QueryInterface(IID_IHTMLInputElement, (LPVOID*)
					& InputElement);
 
				if (InputElement)
				{
					// Check the Button 
					InputElement->put_checked(1);
					DISPID idMethod[1];
					LPOLESTR FnName[1] =
					{
						L"OnClick"
					};
					if (InputElement->GetIDsOfNames(IID_NULL, FnName, 1,
							LOCALE_SYSTEM_DEFAULT, idMethod) == 0)
					{
						DISPPARAMS dpNoArgs =
						{
							NULL, NULL, 0, 0
						};
						InputElement->Invoke(idMethod[0], IID_NULL,
							LOCALE_SYSTEM_DEFAULT, DISPATCH_METHOD, &dpNoArgs,
							NULL, NULL, NULL);
					}
				}
			}
		}
	}
}
                                  
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Asked On
2009-10-29 at 14:40:15ID24856400
Tags

WebBrowser IHTMLDocument2

,

TCppWebBrowser

Topics

C++ Builder

,

Microsoft Visual C++

,

Delphi IDE

Participating Experts
2
Points
500
Comments
3

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Answers

 

by: DanRollinsPosted on 2009-10-30 at 15:48:23ID: 25707259

In this specific page, I think that you could just execute the submit action of the form (you are currently executing the OnClick handler of the submit button).  

Another possible angle of attack:  Set the OnClick action to NULL or "" or "return true;" -- something like that -- and then do the click() on the button... which should then do the default action of submitting the form.

As to a general-purpose way to dismiss a confirm()-function created dialog, I don't know the answer to that.  It might be possible.

One other note:  Although you are working with Borland C++, you might find some useful general help about browser automation here:

   Browser Bot -- Automate Browsing Sequences With C++      
    http://www.experts-exchange.com/articles/Programming/System/Windows__Programming/Browser-Bot-Automate-Browsing-Sequences-With-C-PART-ONE.html

 

by: GeorgSPosted on 2009-11-03 at 07:00:02ID: 25729536

Hello,
you can try this:

on a frameless page, if the form name is "form1" and the submit button name is "sendTo":
String sScript    = "document.form1.sendTo.submit()";
bool bOk            = bExecJS(sScript);

and in a page that contains frames, if the frame index is 2:
String sScript    = sScript    = "document.frames[2].form1.sendTo.submit()";
bool bOk            = bExecJS(sScript);

(the TCppWebBrowser name in this sample code is "IE")

bool __fastcall ThttpnetWnd::bExecJS(String sScript )
{
   bool                        bRet    = false;
   IHTMLDocument2  *doc  = NULL;
   IHTMLWindow2    *win    = NULL;
   if(    SUCCEEDED(IE->Document->QueryInterface(IID_IHTMLDocument2, (LPVOID*)&doc)))  {
           HRESULT hr = doc->get_parentWindow(&win);
           if (SUCCEEDED(hr))  {
                   Application->ProcessMessages();
                   VARIANT     v;
                   long        iExecScript = 0;
                   VariantInit(&v);

                   iExecScript         = win->execScript( WideString(sScript), WideString("Javascript"), &v );

                   if( iExecScript == 0 )
                           bRet = true;
                   VariantClear   ( &v );
                   win->Release();
                   Application->ProcessMessages();
           }
           doc->Release();
   }
   return bRet;
}


20120131-EE-VQP-002

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