C / C++ / MFC

Re: how to write a display program or a reader program??

15-Oct-09 2:09

mr bard2 wrote:
i want to do a software to read text data and display the text...

This is a fairly basic question with many samples around, take a look here[^], as a starting point.

David Crow15-Oct-09 3:17

David Crow

15-Oct-09 3:17

Have you looked at CStdioFile and its members?

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Re: how to write a display program or a reader program??

Rajesh R Subramanian15-Oct-09 3:43

Rajesh R Subramanian

15-Oct-09 3:43

Hi, see here[^]

“Follow your bliss.” – Joseph Campbell

IHTMLDocument2 for Table Par [modified]

NaveenHS15-Oct-09 1:19

15-Oct-09 1:19

Hello Everyone,

This is my 2nd Post regarding the Text extraction from the WebPages.

In my Previous post David Crow suggested me use IHTMLDocument2 interface,
In the code project depository I found this application

Parsing HTML using MSHTML [] by Philip Patrick ..Extracts all the links in the WebPages Using HREF Tag,

Can I use the same application to extract the Text from the Table from the WebPages ?

I searched for Table tag from which I can extract the text, I did not find any information. Can anyone please tell me is it possible to use MSHTML using IHTMLDocument2 interface can I extract the Text from the <table> Tag.

Thanking you,
Naveen HS.

void CTestDlg::OnBgo() 
{
	UpdateData();
	CWaitCursor wait;
	if(m_csFilename.IsEmpty()){
		AfxMessageBox(_T("Please specify the file to parse"));
		return;
	}
	CFile f;

	//let's open file and read it into CString (u can use any buffer to read though
	if (f.Open(m_csFilename, CFile::modeRead|CFile::shareDenyNone)) {
		m_wndLinksList.ResetContent();
		CString csWholeFile;
		f.Read(csWholeFile.GetBuffer(f.GetLength()), f.GetLength());
		csWholeFile.ReleaseBuffer(f.GetLength());
		f.Close();

		//declare our MSHTML variables and create a document
		MSHTML::IHTMLDocument2Ptr pDoc;
		MSHTML::IHTMLDocument3Ptr pDoc3;
		MSHTML::IHTMLElementCollectionPtr pCollection;
		MSHTML::IHTMLElementPtr pElement;

		HRESULT hr = CoCreateInstance(CLSID_HTMLDocument, NULL, CLSCTX_INPROC_SERVER, 
			IID_IHTMLDocument2, (void**)&pDoc);
		
		//put the code into SAFEARRAY and write it into document
		SAFEARRAY* psa = SafeArrayCreateVector(VT_VARIANT, 0, 1);
		VARIANT *param;
		bstr_t bsData = (LPCTSTR)csWholeFile;
		hr = SafeArrayAccessData(psa, (LPVOID*)&param);
		param->vt = VT_BSTR;
		param->bstrVal = (BSTR)bsData;
		
		hr = pDoc->write(psa);
		hr = pDoc->close();
		
		SafeArrayDestroy(psa);

		//I'll use IHTMLDocument3 to retrieve tags. Note it is available only in IE5+
		//If you don't want to use it, u can just run through all tags in HTML
		//(IHTMLDocument2->all property)
		pDoc3 = pDoc;
		
		//display HREF parameter of every link (A tag) in ListBox
		pCollection = pDoc3->getElementsByTagName(L"A");
		for(long i=0; i<pCollection->length; i++){
			pElement = pCollection->item(i, (long)0);
			if(pElement != NULL){
				//second parameter says that you want to get text inside attribute as is
				m_wndLinksList.AddString((LPCTSTR)bstr_t(pElement->getAttribute("href", 2)));
			}
		}
	}
}

modified on Thursday, October 15, 2009 8:30 AM

«_Superman_»15-Oct-09 6:40

«_Superman_»

15-Oct-09 6:40

You could use IHTMLDocument2::get_all[^] method to get an IHTMLElementCollection[^] interface.
You can now iterate through this collection and then use IHTMLElement::get_tagName[^] to check if it is a table.

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

Microsoft MVP (Visual C++)

NaveenHS16-Oct-09 1:06

16-Oct-09 1:06

Hello Sir,

Thank you very much for the response.

I have added this lines to the above code.

MSHTML::IHTMLDocument2 *pDoc1 = NULL;
MSHTML::IHTMLElementCollection *pColl = NULL;

pColl = pDoc1->get_all(L"table");

int y = pColl->length;
for(int x = 0; x < y ; x++)
{
}

i am getting the following Error :-

error C2664: 'MSHTML::IHTMLDocument2::get_all' : cannot convert parameter 1 from 'const wchar_t [6]' to 'MSHTML::IHTMLElementCollection **'

«_Superman_»16-Oct-09 5:01

«_Superman_»

16-Oct-09 5:01

NaveenHS wrote:
pColl = pDoc1->get_all(L"table");

This is wrong.
get_all will give you all elements and not all tables.
get_all takes the IHTMLElementCollection pointer as the parameter.
As a general rule, all COM calls in C++ will return an HRESULT.
Except maybe AddRef and Release.

So you will have to check the tag name in a loop to see if they are tables.

So the get_all call would look like this -

pDoc1->get_all(&pColl);

I would recommend using ATL here.
Otherwise you will have to remember to call Release for all these pointers.

So my recommended way would look like this -

CComPtr<MSHTML::IHTMLElementCollection> pColl = NULL;
pDoc1->get_all(&pColl);

You can use the IHTMLElementCollection::item[^] method to get an IDispatch pointer to each element in the collection.
This can in turn be QIed to an IHTMLElement[^] or IHTMLDOMNode[^] interface.
Check the methods of the interfaces to identify the table tags that you need.

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

Microsoft MVP (Visual C++)

NaveenHS19-Oct-09 1:02

19-Oct-09 1:02

Hello Sir,

Thanks a lot for the reply.

I made changes as mentioned by you, but still i am not able to extract the data from the table. can u please tell what change i have to make.

                MSHTML::IHTMLDocument2Ptr pDoc;
		MSHTML::IHTMLDocument3Ptr pDoc3;
		MSHTML::IHTMLElementCollectionPtr pCollection;
		MSHTML::IHTMLElementPtr pElement;

HRESULT hr = CoCreateInstance(CLSID_HTMLDocument, NULL, CLSCTX_INPROC_SERVER, 
			IID_IHTMLDocument2, (void**)&pDoc);

pDoc3 = pDoc;

		pDoc->get_all(&pCollection);

		pCollection = pDoc3->getElementsByTagName(L"table");

		
		for(long i=0; i<pCollection->length; i++){
			pElement = pCollection->item(i, (long)0);
			if(pElement != NULL){
				m_wndLinksList.AddString((LPCTSTR)bstr_t(pElement->getAttribute("table"),10));
			}
		}

Error :- error C2660: 'MSHTML::IHTMLElement::getAttribute' : function does not take 1 arguments

«_Superman_»19-Oct-09 5:32

«_Superman_»

19-Oct-09 5:32

The syntax for getAttribute is not correct.

Do it this way -

CComBSTR name("table");
VARIANT result;
pElement->getAttribute(name, 0, &result);

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

Microsoft MVP (Visual C++)

NaveenHS20-Oct-09 2:21

20-Oct-09 2:21

Hello sir,

I added the code , still getting the error.

pDoc->get_all(&pCollection);

		pCollection = pDoc3->getElementsByTagName("table");

		CComBSTR name("table");
		VARIANT result;

		for(long i=0; i<pCollection->length; i++){
			pElement = pCollection->item(i, (long)0);
			if(pElement != NULL){
			
			m_wndLinksList.AddString((LPCTSTR)bstr_t(pElement->getAttribute(name, 0, &result)));

			
			}
		}

I am getting the below error :-
error C2660: 'MSHTML::IHTMLElement::getAttribute' : function does not take 3 arguments

C++

john curtin14-Oct-09 23:46

john curtin

14-Oct-09 23:46

I'm getting an error message with this line of code, int _int tmain (int argc,_TCHAR* ARGV[]) ,the error E2303 says "Type name expected".
Can somebody advise me, please?

Richard MacCutchan15-Oct-09 0:00

15-Oct-09 0:00

john curtin wrote:
int _int tmain (int argc,_TCHAR* ARGV[])

should read int _tmain(int argc, _TCHAR* argv[])

CPallini15-Oct-09 0:06

CPallini

15-Oct-09 0:06

john curtin wrote:
int _int tmain (int argc,_TCHAR* ARGV[])

The bold _int is an alien, remove it.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Richard MacCutchan15-Oct-09 0:35

15-Oct-09 0:35

CPallini wrote:
The bold _int is an alien

Where do you think it came from? Maybe CSS knows ... Laugh | :laugh:

Tim Craig15-Oct-09 19:06

Tim Craig

15-Oct-09 19:06

Richard MacCutchan wrote:
Maybe CSS knows

Know and CSS in the same sentence, now that's alien. Laugh | :laugh:

You measure democracy by the freedom it gives its dissidents, not the freedom it gives its assimilated conformists.

I/O files

programmer20214-Oct-09 23:26

programmer202

14-Oct-09 23:26

Hello to everyone.

I want to read line by line an input file (leer_datos).

In the input file (leer_datos): If the first character of each line is '|', then I copy the whole line and paste it in an output file (escribir_datos).
In the input file (leer_datos): If the first character isn´t '|' then I go to the next line in the input file (leer_datos).

My code:

#include <stdio.h>;

int main(void)
{

    FILE *leer_datos, *escribir_datos;
    char muestra[50];

	leer_datos = fopen("input_file.txt", "rt"); 
    escribir_datos = fopen("output_file.txt", "wt");

	while ( (!feof(leer_datos)) && (!ferror(leer_datos)) ) 

	{
		muestra = getc(leer_datos) ;
		if (muestra == '|')  
		     {
			  fgets(muestra, sizeof(muestra), leer_datos); 
              fputs(muestra, escribir_datos);
			  fputs("\n", escribir_datos);
		     }
	
   
	}

	if (fclose(leer_datos) != 0)
		printf ("Hay problemas al cerrar el fichero de lectura de datos\n");  

    if (fclose(escribir_datos) != 0)
		printf ("Hay problemas al cerrar el fichero de escritura de datos\n");    

}

...but it gives some errors and I don´t sure about it works fine.
Anyone could help me, please!?.

Re: I/O files

Richard MacCutchan14-Oct-09 23:38

Maximum client count of TCP/IP

14-Oct-09 23:38

muestra = getc(leer_datos) ;
if (muestra == '|')
    {
  fgets(muestra, sizeof(muestra), leer_datos);
      fputs(muestra, escribir_datos);
  fputs("\n", escribir_datos);
}

In the above code if the first character is NOT '|' you still have the remainder of the line of text to read next time round the loop. It would be better to read each line into muestra and just test the first character if (muestra[0] == '|') ...

Re: I/O files

David Crow15-Oct-09 3:20

David Crow

15-Oct-09 3:20

programmer202 wrote:
...but it gives some errors...

Really. Are you keeping those to yourself?

includeh1014-Oct-09 23:13

includeh10

14-Oct-09 23:13

I want to know the maximum client count that a server can accepts (TCP/IP or socket).

Of couse, client count depends on server's hardware and software - this is my question:

Based on general good computer hardware and Windows, what are common and "best" software (OS and others) for supporting more TCP/IP clients? what is maximum possible client count related to the software?

BTW: please only post reply related to my question.

modified on Thursday, October 15, 2009 5:23 AM

Richard MacCutchan14-Oct-09 23:40

14-Oct-09 23:40

includeh10 wrote:
BTW: please only post reply related to my question.

BTW please only post questions related to the forum!

includeh1014-Oct-09 23:44

includeh10

14-Oct-09 23:44

F u c k you if you still make nonsense.

Rajesh R Subramanian14-Oct-09 23:56

Rajesh R Subramanian

14-Oct-09 23:56

includeh10 wrote:
F * * k you if you still make nonsense.

Keep this sort of language at your home. May be people over there will like it very much. But, it won't be tolerated here.

Your query is a basic networking query and has nothing to do with C/C++. And you "demand" that people should give you an exact answer? So, Richard told you that this isn't the right forum.

I've reported your message as abusive.

“Follow your bliss.” – Joseph Campbell

Richard MacCutchan15-Oct-09 0:35