C / C++ / MFC Discussion Boards

Code-o-mat24-Feb-09 0:14

24-Feb-09 0:14

Well, looking at the code of the FTP client i'd say it should work, maybe there is something i do not know about... could you show me how your code looks like now?

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ODBC timeout

chuengchuenghq23-Feb-09 21:26

chuengchuenghq

23-Feb-09 21:26

Hi all:
I have encountered a strange and difficult problem when running application on multi-user mode.
User A and User B are running the same appclication which is using the same database(SQL2000)with remotely log in.User A is doing a operation which might take a long time to query the data from databse on the GUI of the application,at the same time,the Interface of application on user B will bolck when User B is clicking,editing the GUI of the application,Exactly I have found why this problem occurs:the requery() function is timeout when user B is querying,ODBC S1T00 query time out expired.
what I did to fix this problem is that ignore this CDBException when catched this exception,and let the application keep running anyway.but there might be any error when operating the application again.
so what is the proper way to fix this problem,setting the value of timeout should never be a good idea,I think.
Could anyone help me ,thank you in advance.

regards
Keshin Cry | :((

Re: ODBC timeout

chuengchuenghq23-Feb-09 21:36

chuengchuenghq

23-Feb-09 21:36

thanks

Re: ODBC timeout

CPallini23-Feb-09 21:46

CPallini

23-Feb-09 21:46

You possibly may get better help at the General Database forum [^].
Smile | :)

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-- Alfonso the Wise, 13th Century King of Castile.

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[My articles]

Re: ODBC timeout

Eytukan23-Feb-09 21:47

Eytukan

23-Feb-09 21:47

You can ask the same here instead :
DB Forum[^]

But I don't understand why it should wait for the other application to finish it's query. Both should run independently. In general, If you find the queries are taking too long, you make opt for a worker thread.

OK,. what country just started work for the day ? The ASP.NET forum is flooded with retarded questions. -Christian Graus

Best wishes to Rexx[^]

How do I redirect output of my console using PsExec?

SherTeks23-Feb-09 21:20

SherTeks

23-Feb-09 21:20

I'm using a remote execution tool called 'PsExec' from sysinternals.

I use it this way in my command prompt :

D:\Tools\Testing>psexec netsh firewall show opmode>D:\Log.txt

This generates the output for 'netsh firewall show opmode' and redirects to D:\Log.txt

Now, I implement the same logic/code in my application like this :

CString	csCmdLineParams = "netsh firewall show opmode>D:\\TestdwLog.txt";

STARTUPINFO		StartUpInfo;
PROCESS_INFORMATION	ProcInfo;

DWORD	ExitCode = -1;

memset(&StartUpInfo, 0, sizeof(StartUpInfo));

memset(&ProcInfo, 0, sizeof(ProcInfo));

StartUpInfo.dwFlags = STARTF_USESHOWWINDOW;

StartUpInfo.wShowWindow = SW_SHOW;

CreateProcess( "C:\\windows\\system32\\cmd.exe", csCmdLineParams.GetBuffer(csCmdLineParams.GetLength() + ONE), NULL, NULL, NULL, CREATE_DEFAULT_ERROR_MODE, NULL, NULL, &StartUpInfo, &ProcInfo);

WaitForSingleObject(ProcInfo.hProcess, INFINITE);

GetExitCodeProcess(ProcInfo.hProcess, &ExitCode );

if (ExitCode) {
	csCmdLineParams.ReleaseBuffer();
	CloseHandle(ProcInfo.hProcess);
}

csCmdLineParams.ReleaseBuffer();

CloseHandle(ProcInfo.hProcess);

But, I'm not able to redirect the output to D:\TestdwLog.txt. In fact the file is not created itself.

Note : I do have administrator rights for my system. [required for PsExec]

What am I doing wrongly ?

I also tried

StartUpInfo_IDI.dwFlags = STARTF_USESTDHANDLES; instead of StartUpInfo.dwFlags = STARTF_USESHOWWINDOW;

Replies would be appreciated

Thanks in advance.

Re: How do I redirect output of my console using PsExec?

Garth J Lancaster23-Feb-09 21:52

Garth J Lancaster

23-Feb-09 21:52

Im pretty sure you'll get mileage out of the following links - the 3rd link is for VB, but illustrates an alternate technique - ymmv

http://www.codeproject.com/KB/threads/RTconsole.aspx[^]

http://www.codeproject.com/KB/threads/redir.aspx[^]

http://www.devx.com/vb2themax/Article/19825/1954[^]

Im pretty sure search on CP or google would have found these for you..

Re: How do I redirect output of my console using PsExec?

David Crow24-Feb-09 3:24

David Crow

24-Feb-09 3:24

Put psexec netsh firewall show opmode>D:\Log.txt in a batch file, and run the batch file from CreateProcess().

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Re: How do I redirect output of my console using PsExec?

SherTeks24-Feb-09 17:31

SherTeks

24-Feb-09 17:31

Thanks David.

This works.

Also found another option of using system()

Thanks

Using MSXML Parser in the VC++ 2005 Express Edition

Ajit Jadhav23-Feb-09 21:18

Ajit Jadhav

23-Feb-09 21:18

I know how to use the MS XML Parser in VC++ 6. For instance, I can do a #import the dll using the appropriate namespace.

But this does not seem to work in VC++ 2005 Express Edition...

What do I need to do so that I could use MSXML parser in my C++ sources which are to be compiled with the free VC++ 2005 Express Edition alone (and no other compiler)?

Please provide pointers to any helpful articles/pages here or elsewhere.

Thanks in advance.

----------
" target="">http://www.JadhavResearch.info

Re: Using MSXML Parser in the VC++ 2005 Express Edition

Eytukan23-Feb-09 21:29

Eytukan

23-Feb-09 21:29

What's the error you are getting? when you do an import in VS2005?

OK,. what country just started work for the day ? The ASP.NET forum is flooded with retarded questions. -Christian Graus

Best wishes to Rexx[^]

Re: Using MSXML Parser in the VC++ 2005 Express Edition

Stuart Dootson23-Feb-09 22:55

Stuart Dootson

23-Feb-09 22:55

To use #import with an Express edition, you need to remove any mention of ATL (as the express editions don't ship with ATL). That means no smart pointers, no wrappers for VARIANT or BSTR. You can tell #import not to use ATL with attributes (see the second example below).

So, it can be done, but it means going from code like this:

#include <tchar.h>

#define _ATL_CSTRING_EXPLICIT_CONSTRUCTORS      // some CString constructors will be explicit

#include <atlbase.h>
#include <atlstr.h>

#include <iostream>

#import <progid:Msxml2.DOMDocument.6.0> rename_namespace("TestNS")

int _tmain(int argc, _TCHAR* argv[])
{
   CoInitializeEx(0, COINIT_MULTITHREADED);
   TestNS::IXMLDOMDocument3Ptr pDoc(__uuidof(TestNS::FreeThreadedDOMDocument60));

   pDoc->load("CHange-History.xml");
   pDoc->setProperty("SelectionLanguage", "XPath");
   TestNS::IXMLDOMNodeListPtr selected = pDoc->documentElement->selectNodes("//configuration");
   long nodeCount;
   selected->get_length(&nodeCount);
   std::cout << nodeCount << " configuration nodes\n";
   CoUninitialize();
	return 0;
}

to code like this (it runs and gives the same answer as the code above, but I'm not sure that I manage resources correctly....

#include <tchar.h>
#include <iostream>

#import <progid:Msxml2.DOMDocument.6.0> rename_namespace("TestNS") raw_interfaces_only no_implementation no_smart_pointers raw_native_types

int _tmain(int argc, _TCHAR* argv[])
{
   CoInitializeEx(0, COINIT_MULTITHREADED);
   TestNS::IXMLDOMDocument3* pDoc;
   HRESULT hr;
   
   if (SUCCEEDED(hr = ::CoCreateInstance(__uuidof(TestNS::FreeThreadedDOMDocument60), 0, CLSCTX_ALL, __uuidof(TestNS::IXMLDOMDocument3), (void**)&pDoc)))
   {
      BSTR file = ::SysAllocString(L"CHange-History.xml");
      VARIANT vFile;
      V_VT(&vFile) = VT_BSTR;
      V_BSTR(&vFile) = file;
      VARIANT_BOOL loadedOK;
      if (SUCCEEDED(hr = pDoc->load(vFile, &loadedOK) && loadedOK == VARIANT_TRUE))
      {
         BSTR propName = ::SysAllocString(L"SelectionLanguage");
         BSTR selectionLanguage = ::SysAllocString(L"XPath");
         VARIANT vSelLang;
         V_VT(&vSelLang) = VT_BSTR;
         V_BSTR(&vSelLang) = selectionLanguage;
         TestNS::IXMLDOMElement* docElement;
         BSTR xpath = ::SysAllocString(L"//configuration");
         TestNS::IXMLDOMNodeList* selected;
         if (SUCCEEDED(hr = pDoc->setProperty(propName, vSelLang)))
         {
            if (SUCCEEDED(hr = pDoc->get_documentElement(&docElement)))
            {
               if (SUCCEEDED(hr = docElement->selectNodes(xpath, &selected)))
               {
                  long nodeCount;
                  if (SUCCEEDED(selected->get_length(&nodeCount)))
                  {
                     std::cout << nodeCount << " configuration nodes\n";
                  }
                  selected->Release();
               }
               docElement->Release();
            }
         }
         ::SysFreeString(xpath);
         ::SysFreeString(propName);
         ::SysFreeString(selectionLanguage);
      }
      ::SysFreeString(file);
      pDoc->Release();
   }
   CoUninitialize();
   return 0;
}

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: Using MSXML Parser in the VC++ 2005 Express Edition

Ajit Jadhav24-Feb-09 6:19

Ajit Jadhav

24-Feb-09 6:19

Thanks, Stuart!

BTW, in the meanwhile, I have already made use of TinyXML because my requirements were very very simple. My document has a very simple (and predictable) structure that is just two/three levels deep... It doesn't have to to have validation...

Why TinyXML? Because, Google showed it above the others, that's why...

Thanks again, anyway, and bye for now

----------
http://www.JadhavResearch.info

Re: Using MSXML Parser in the VC++ 2005 Express Edition

Stuart Dootson24-Feb-09 6:28

Stuart Dootson

24-Feb-09 6:28

Ajit Jadhav wrote:
TinyXML

Sounds like the right thing for your scenario.

Another option that might have suited you is RapidXML[^] - it's so small that it's contained in a single header file you #include into your code!

[edit]Or Microsoft's XmlLite[^], possibly[/edit]

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

how can i see the fucntions available in the dll file.

hariakuthota23-Feb-09 21:14

hariakuthota

23-Feb-09 21:14

Hi all,

I have a dll file which i want to use in my application before that i want to check the available functions in that so that i can decide whether to use it or not.

Please suggest me a way through which I can see the fucntions before usign it.

Thanks in advance....

Re: how can i see the fucntions available in the dll file.

KarstenK23-Feb-09 21:28

KarstenK

23-Feb-09 21:28

API-funciton LoadLibrary() and GetProcAdress() will help. There is also a really great Tool from MS "depends.exe" which often helped me. Blush | :O

Greetings from Germany

Re: how can i see the fucntions available in the dll file.

Archy_Yu23-Feb-09 21:42

Archy_Yu

23-Feb-09 21:42

i personally think you can use the tool which is supplied by VC6.0's "Dumpbin",which is in the "bin" file,open it and print the command "C:\Books\14>dumpbin ~~.dll /exports",then you can get the information about the exports method.
may you luck.

Re: how can i see the fucntions available in the dll file.

Chandrasekharan P23-Feb-09 21:52

Chandrasekharan P

23-Feb-09 21:52

But i feel that depends.exe is a much better tool.

multithreading and read only STL container

manustone23-Feb-09 20:57

manustone

23-Feb-09 20:57

Hi I am newbie to Multithreading in C++
I have a static shared std::map< std::string >
I am 100% sure that it will be used only READ-ONLY after it has been filled up at startup of the application;
my question is: do I have to use thread synchronization to control the access to it or can I avoid?
Since it is read only, maybe I can skip using a mutex; is this a good idea?
Kind Regards
Manustone

Re: multithreading and read only STL container

KarstenK23-Feb-09 21:30

KarstenK

23-Feb-09 21:30

You can as long as you only read it. Make it a const or with a const accessor function, to ensure it.

Greetings from Germany

Re: multithreading and read only STL container

manustone23-Feb-09 22:21

manustone

23-Feb-09 22:21

Many thanks!
ManuStone

Re: multithreading and read only STL container