C / C++ / MFC

27-Jun-10 18:36

Dear Friends,

Can you please send any sample code which shows a clear idea of implimentation of IHTMLElement in VC++ for retriving Input element. Please help soon.

Thankx Smile | :)

Stephen Hewitt27-Jun-10 19:09

Stephen Hewitt

27-Jun-10 19:09

Show us what you've done so far.

Steve

ThatsAlok27-Jun-10 19:14

ThatsAlok

27-Jun-10 19:14

Pk.j wrote:
Can you please send any sample code which shows a clear idea of implimentation of IHTMLElement in VC++ for retriving Input element. Please help soon

Are you able to read HTML file in IHTMLDocument?

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«_Superman_»27-Jun-10 19:23

27-Jun-10 19:23

If you're looking for an input element, there is an interface called IHTMLInputElement that may be useful to you.
An HTML element has many type of attributes that you can retrieve.
You haven't mentioned what you want to retrieve.

Here is an article that may be of help to you - Adding a custom search feature to CHtmlViews[^]

«_Superman_»

I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Polymorphism in C

Pk.j27-Jun-10 21:39

27-Jun-10 21:39

Thank you for you advice.

Actually I want to retrieve 'id' Input element of a resource like Password Field in a webpage. I had tried this interface IHTMLInputElement, but it has no memberfunctions to retieve 'id' value. Thats why i'm especting 'IHTMLElement' may help us for getting 'id' value. If you are feeling this is the right way or we should take help of other COM interfaces to get my requiremet ,then please help me by sending a detail sample code for the interface.

Thanks

«_Superman_»27-Jun-10 22:16

27-Jun-10 22:16

Yes, you must use IHTMLElement::get_id to get the id of an element.
Where are you facing the problem and what have you got so far.

«_Superman_»

I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Polymorphism in C

Pk.j27-Jun-10 22:48

27-Jun-10 22:48

Here is my code stuff through which i'm trying to abstract 'id' value

=======================================================================
IHTMLElement *pElement;
HRESULT hr;
TCHAR tChrID[500];
BSTR bStrID;

hr = pElement->get_id(&bStrID);
if (SUCCEEDED(hr))
{
CString StrS;
if (bStrID)
{
WideCharToMultiByte(CP_ACP, 0, bStrID, -1, tChrID, 500, NULL, NULL);
SysFreeString (bStrID);
}

StrS = tChrID;
WriteToLog(StrS); // Creating LOG of 'id'values
pElement ->Release();
}

int WriteToLog(CString strLog)
{
// Open the existing file, or, if the file does not exist,
// create a new file.

SYSTEMTIME systime;
//get universal system time
GetSystemTime(&systime);
CString strTemp;
strTemp.Format (_T("\n%s"), strLog);

HANDLE hFile;
DWORD dwBytesWritten, dwPos;
hFile = CreateFile (TEXT("\\progra~1\\softex\\omnipass\\LOG.TXT"), // Open Two.txt.
GENERIC_WRITE, // Open for writing
0, // Do not share
NULL, // No security
OPEN_ALWAYS, // Open or create
FILE_ATTRIBUTE_NORMAL, // Normal file
NULL); // No template file

if (hFile == INVALID_HANDLE_VALUE)
{
CloseHandle (hFile); // Close the file.
return 1;
}
else
{
// Append the log file at the end
dwPos = SetFilePointer (hFile, 0, NULL, FILE_END);
WriteFile (hFile, strTemp, (strTemp.GetLength() + 1),&dwBytesWritten, NULL);
}

CloseHandle (hFile);

return 0;
}

===========================================================================

But its crashing my application as soon as any website opened in Internet Explorer-8 .
Please let me knaow any mistake you find in my above stuff or eny other way we should impliment this interface .And please guide me

Thankx

«_Superman_»27-Jun-10 22:51

27-Jun-10 22:51

pElement is only a pointer and is not initialized.
You have to get the IHTMLElement pointer and not just declare it.
This we usually get using a QueryInterface call on some other interface pointer.

«_Superman_»

I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Polymorphism in C

Pk.j27-Jun-10 23:54

27-Jun-10 23:54

I have modified as per your suggestion.My modified lines are in block letter .Please have a look on below & guide me--

=======================================================================
IHTMLElement *pElement;
IDispatch *pDispInput = NULL;
HRESULT hr;
TCHAR tChrID[500];
BSTR bStrID;

if ( pDispInput->QueryInterface(IID_IHTMLElement, (void **)&pElement)== S_OK)
{ hr = pElementLitu->get_id(&bStrID);
if (SUCCEEDED(hr))
{
CString StrS;
if (bStrID)
{
WideCharToMultiByte(CP_ACP, 0, bStrID, -1, tChrID, 500, NULL, NULL);
SysFreeString (bStrID);
}

StrS = tChrID;
WriteToLog(StrS); // Creating LOG of 'id'values
}
pElement ->Release();
}
pDispInput->Release();

========================================================================================

«_Superman_»28-Jun-10 0:07

28-Jun-10 0:07

You're again start from NULL.
Is this code running in a BHO?
If so you it gives you the IWebBrowser2 object in the SetSite method.
You must start from here.
Search for the required element by tag name and then use QueryInterface on the returned IDispatch pointer to get to the IHTMLElement pointer.

«_Superman_»

I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Polymorphism in C

Pk.j28-Jun-10 1:31