Re: How to keep a C++ com dll in memory? - C / C++ / MFC Discussion Boards

Getting the response headers

RED10-Apr-03 3:47

RED

10-Apr-03 3:47

Does anyone know how to get the headers the server sent back with a page in the WebBrowser control?

Execution question

Jump_Around10-Apr-03 3:45

Jump_Around

10-Apr-03 3:45

I want my application to be opened once at the time. 2 different processes of my application cannot be created. If my appliaction is run and I want to run it again the previously created application should be opened.

I am looking for some tutorials or a piee of code

Please help

Re: Execution question

Cedric Moonen10-Apr-03 3:49

Cedric Moonen

10-Apr-03 3:49

There are several article about that on this site !

Take a look at the Thread, Processes & IPC section Smile | :)

Re: Execution question

valikac10-Apr-03 7:47

valikac

10-Apr-03 7:47

One solution is mutex.

Kuphryn

Re: Execution question

imsniper11-Apr-03 0:22

imsniper

11-Apr-03 0:22

Look for Singleton applications...

How to keep a C++ com dll in memory?

Anonymously10-Apr-03 3:37

Anonymously

10-Apr-03 3:37

I have a com dll written in C++ which is used in asp applications. The dll contains only one com object. There are static (global to the process) data objects within this dll. Obviously, I only want to initialize these static objects when the dll is first loaded.

However, IIS seems to be reloading my dll everytime the com object is created and used in an asp page. Confused | :confused:

Re: How to keep a C++ com dll in memory?

Brian Shifrin10-Apr-03 8:02

Brian Shifrin

10-Apr-03 8:02

Load it inside global.asa into Application object?

Brian

Re: How to keep a C++ com dll in memory?

Anonymously10-Apr-03 16:03

Anonymously

10-Apr-03 16:03

Sorry, I am using this C++ com dll in asp projects, not ASP.NET projects.

Url problem

Jump_Around10-Apr-03 3:34

Jump_Around

10-Apr-03 3:34

I have a question.

This is the way I connect to the file through http

CHttpFile *pHttpFile = (CHttpFile *)InternetSession.OpenURL(LPTHD->from,INTERNET_FLAG_TRANSFER_BINARY | INTERNET_FLAG_DONT_CACHE | INTERNET_FLAG_RELOAD);

Everything works fine, but in case the url does not exist I obtain the pointer to the html error page. How to check that the url hasn't been reached?

Please help

Re: Url problem

rrrado10-Apr-03 3:46

rrrado

10-Apr-03 3:46

Check HTTP response code, must be 200 (200 OK) or 2xx I think

rrrado

Re: Url problem

Jump_Around10-Apr-03 7:59

Jump_Around

10-Apr-03 7:59

I know that but i don't know hot to get this error code

Re: Url problem

rrrado10-Apr-03 21:48

rrrado

10-Apr-03 21:48

Check this function, this will do that :

CHttpFile::QueryInfoStatusCode

rrrado

Showing preview in the explorer like for bmp etc.

YuraSV10-Apr-03 3:31

YuraSV

10-Apr-03 3:31

Hi all!

Help me please. I need to show preview info in the left of explorer (like we can see preview of bmp, jpg, html etc.). How can I do this? May be someone can send me expample? I`ll be appreciate for any help.

With best regards,
Yura.

Changes in STL from VC6 to VC7

Franz Klein10-Apr-03 3:17

Franz Klein

10-Apr-03 3:17

I have noticed while trying to compile the MySQL++ library and from the errors returned that:

the reverse_iterator class has changed. According to the Microsoft documentation there has been a change in the STL library.

I was wondering if this change is limited to the Microsoft version of the STL or is it a change in the ANSI C++ STL?

Smile | :)

Re: Changes in STL from VC6 to VC7

Alexandru Savescu10-Apr-03 4:17

Alexandru Savescu

10-Apr-03 4:17

FranzKlein wrote:
I was wondering if this change is limited to the Microsoft version of the STL or is it a change in the ANSI C++ STL?

I doubt there has been a change in ANSI C++ STL. Microsoft STL that ships with VC 7.0 is more compliant with the standard.

Best regards,
Alexandru Savescu

P.S. Interested in art? Visit this!

Re: Changes in STL from VC6 to VC7

Nemanja Trifunovic10-Apr-03 6:24

Nemanja Trifunovic

10-Apr-03 6:24

FranzKlein wrote:
the reverse_iterator class has changed

Yes, this one has hit me too some times ago. Microsoft made the change to make it ANSI compliant.

switch statement

Aaron Knox10-Apr-03 3:13

Aaron Knox

10-Apr-03 3:13

Hi all,
I'm still working on my switch statement program (from previous post)thanks to Joaquin my loop is working but for some reason my switch statements are not being activiated.
I've included a portion of my code, the switch statements continue for each letter a state begins with (d,f,g,h,i,k,etc)
Thanks,
Aaron

<br />
//this program is supposed to read state abbreviations from a file and output the corrosponding state to another file<br />
 <br />
#include <iostream><br />
#include <fstream><br />
<br />
using namespace std;<br />
<br />
int main()<br />
{<br />
  ifstream inAbrev("state abs.txt");               //opens the input file<br />
  ofstream outState("states with abvs.txt");       //opens the output file<br />
  char firstLetter,<br />
       secondLetter;<br />
<br />
  inAbrev >> firstLetter >> secondLetter;<br />
  cout << firstLetter <<  secondLetter << endl;    //just for me to see if anything is happening<br />
  <br />
  while(inAbrev)                                   //read til the end of the file<br />
      {<br />
	inAbrev >> firstLetter >> secondLetter;<br />
        cout << firstLetter <<  secondLetter << endl;<br />
<br />
  switch (firstLetter)<br />
          {<br />
	  case 'A' : switch (secondLetter)<br />
				 {<br />
					case 'L' : outState << inAbrev << " is " << "Alabama" << endl;<br />
                                                  cout << inAbrev << " is " << "Alabama" << endl;<br />
                                                  //here i'm trying to see if anything is happening	<br />
						break;<br />
					case 'K' : outState << inAbrev << " is " << "Alaska" << endl;<br />
						break;<br />
					case 'Z' : outState << inAbrev << " is " << "Arizona" << endl;<br />
						break;<br />
					case 'R' : outState << inAbrev << " is " << "Arkansas" << endl;<br />
						break;<br />
				 }<br />
	  case 'C' : switch (secondLetter)<br />
				 {<br />
					case 'A' : outState << inAbrev << " is " << "California" << endl;<br />
						break;<br />
					case 'O' : outState << inAbrev << " is " << "Colorado" << endl;<br />
						break;<br />
					case 'T' : outState << inAbrev << " is " << "Connecticut" << endl;<br />
						break;<br />
				 }<br />

arrrgh

Re: switch statement

Zdeslav Vojkovic10-Apr-03 3:28

Zdeslav Vojkovic

10-Apr-03 3:28

set the breakpoint on "switch (firstLetter)" line and check the value of firstLetter and secondLetter variables to see what values exactly are in them.

Re: switch statement

Dave Kreskowiak10-Apr-03 6:03

Dave Kreskowiak

10-Apr-03 6:03

It appears as if nothing is happening because all of your output statements (cout and outState) in your switch statement are wrong.

Your doing this:

outState << inAbrev << " is " << "California" << endl;<br />
cout << inAbrev << " is " << "Alabama" << endl;

What this is doing is trying to output the input filestream which, of course, will output nothing.

If I read your homework right, you should be doing something like this:
outState << firstLetter << secondLetter << " is Alabama" << endl;

RageInTheMachine9532

Re: switch statement

Toni7810-Apr-03 19:13

Toni78

10-Apr-03 19:13

Yep RageInTheMachine is right.

none

Memory Leaks in ADO and MSXML

butchb10-Apr-03 2:56

butchb

10-Apr-03 2:56

I have recently written a Service that parses a large XML file using MSXML, breaks the xml down in to fragments, and then calls a SQL Server stored procedure to process the xml fragment. As each call to the stored procedure is made memory is leaked. I have not been able to find any information concering this particular problem. It also appears that the MSXML objects are also leaking memory. The code fragment that follows is where the leak occurs. All pointer are SmartPointers and no dynamic allocation occurs in my code. Anybody have any ideas?

IXMLDOMNodeListPtr LogEntries = pXMLDocRoot->childNodes;
IXMLDOMElementPtr LogEntry = NULL;
for( int i = 0; i < LogEntries->length; ++i )
{
LogEntry = LogEntries->item[i];
if(LogEntry->nodeType == NODE_ELEMENT )
{
CString nodeName = (TCHAR*) LogEntry->nodeName;
CString spName;
spName.Format(_T("sp_%s"),nodeName);
CString xml = (TCHAR*)LogEntry->xml;

// execute this data
if (S_OK != m_AdoCmd.Execute_StoredProc(spName, xml))
{
CString errorMsg;
errorMsg.Format("Failed to execute stored procedure %s: error: %s", spName, m_AdoCmd.m_errorStr);
LogErrorMsg("ProcessXML: " + errorMsg);
return false;
}
}
LogEntry.Release();

}
LogEntries->reset();

Butch

process exe full path

cubiq10-Apr-03 2:54

cubiq

10-Apr-03 2:54

I have to do this for Windows 95/98/Me/200/NT/XP:
I have the ID of a process(obtained with Process32First/Next) and I want to get the full path of the executable hwo started that process. In PROCESSENTRY32 the member szExeFile gives me only the name of the file but not the full path...
Thank you!
Best regards,
radu.

Re: process exe full path

valikac10-Apr-03 7:53

valikac

10-Apr-03 7:53

One solution is EnumProcessModules().

OpenProcess()
EnumProcessModules()
GetModuleFileNameEx()

Kuphryn

Re: process exe full path

cubiq10-Apr-03 21:15

cubiq

10-Apr-03 21:15

That's what MSDN says:
Windows NT/2000/XP: Included in Windows NT 4.0 and later.
Windows 95/98/Me: Unsupported.

So it's not a solution for 95/98/Me...

Parsing "*.xls" file

Abin10-Apr-03 2:47

Abin

10-Apr-03 2:47

I'm working on a project which will need to read/write xls files(Microsoft Excel documents), hmm... I don't have any idea how xls files are serialized, is there any library for doing this? Oh is there any articles/documentation about this topic? Thanks a lot.

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