Solved

Directory browsing with MS C 2008

Posted on 2011-09-14
6
341 Views
Last Modified: 2012-05-12
Dear experts!

I’m programmer with 10+ years in industry, but totally new to MS C 2008 and I need help.

I have a variable
 LPCTSTR sPicFile=”C:\Temp\Pic001.tif”

I need a code which to search directory for files like
C:\Temp\Pic002.tif C:\Temp\Pic003.tif and so on up to C:\Temp\Pic999.tif

Please note that some of the pic may be missing, however I should put it in correct order in let say LPCTSTR[] sPic
0
Comment
Question by:dvplayltd
6 Comments
 
LVL 15

Expert Comment

by:Minh Võ Công
ID: 36541119
LPCTSTR sPicFile= L”C:\Temp\Pic001.tif”;
or  LPCTSTR sPicFile=_T(”C:\Temp\Pic001.tif”);
0
 
LVL 15

Expert Comment

by:Minh Võ Công
ID: 36541123
0
 

Author Comment

by:dvplayltd
ID: 36541231
Look that you do not understand me at all

I have this
LPCTSTR sPicFile= L”C:\Temp\Pic001.tif”;
 
I need code to check for:
sPicFile= L”C:\Temp\Pic002.tif”; - does the file extis in HDD - if yes - add to thearray
sPicFile= L”C:\Temp\Pic002.tif”; - does the file extis in HDD - if yes - add to thearray
sPicFile= L”C:\Temp\Pic004.tif”; - does the file extis in HDD - if No - do nothing, then check for
sPicFile= L”C:\Temp\Pic005.tif”; - does the file extis in HDD - if yes - add to thearray
0
How to run any project with ease

Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
- Combine task lists, docs, spreadsheets, and chat in one
- View and edit from mobile/offline
- Cut down on emails

 
LVL 32

Accepted Solution

by:
sarabande earned 500 total points
ID: 36541803
first you need to change the backslash into two backslashes or the path would not be found:

LPCTSTR sPicFile= L”C:\\Temp\\Pic001.tif”;

the \  is escape character in c.

to check for existence of a file you can use stat function:

#include <sys/stat.h>
...

struct stat fileinfo;
if (stat("c:\\temp\\pic001.tif", &fileinfo) == 0)
{
     // file exists !!!
}

Open in new window


Sara
0
 
LVL 86

Expert Comment

by:jkr
ID: 36542938
The following should be helpful and works with  both ANSI and UNICODE: http://msdn.microsoft.com/en-us/library/aa365200%28v=VS.85%29.aspx ("Listing the Files in a Directory")
#include <windows.h>
#include <tchar.h> 
#include <stdio.h>
#include <strsafe.h>
#pragma comment(lib, "User32.lib")

void DisplayErrorBox(LPTSTR lpszFunction);

int _tmain(int argc, TCHAR *argv[])
{
   WIN32_FIND_DATA ffd;
   LARGE_INTEGER filesize;
   TCHAR szDir[MAX_PATH];
   size_t length_of_arg;
   HANDLE hFind = INVALID_HANDLE_VALUE;
   DWORD dwError=0;
   
   // If the directory is not specified as a command-line argument,
   // print usage.

   if(argc != 2)
   {
      _tprintf(TEXT("\nUsage: %s <directory name>\n"), argv[0]);
      return (-1);
   }

   // Check that the input path plus 3 is not longer than MAX_PATH.
   // Three characters are for the "\*" plus NULL appended below.

   StringCchLength(argv[1], MAX_PATH, &length_of_arg);

   if (length_of_arg > (MAX_PATH - 3))
   {
      _tprintf(TEXT("\nDirectory path is too long.\n"));
      return (-1);
   }

   _tprintf(TEXT("\nTarget directory is %s\n\n"), argv[1]);

   // Prepare string for use with FindFile functions.  First, copy the
   // string to a buffer, then append '\*' to the directory name.

   StringCchCopy(szDir, MAX_PATH, argv[1]);
   StringCchCat(szDir, MAX_PATH, TEXT("\\*"));

   // Find the first file in the directory.

   hFind = FindFirstFile(szDir, &ffd);

   if (INVALID_HANDLE_VALUE == hFind) 
   {
      DisplayErrorBox(TEXT("FindFirstFile"));
      return dwError;
   } 
   
   // List all the files in the directory with some info about them.

   do
   {
      if (ffd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
      {
         _tprintf(TEXT("  %s   <DIR>\n"), ffd.cFileName);
      }
      else
      {
         filesize.LowPart = ffd.nFileSizeLow;
         filesize.HighPart = ffd.nFileSizeHigh;
         _tprintf(TEXT("  %s   %ld bytes\n"), ffd.cFileName, filesize.QuadPart);
      }
   }
   while (FindNextFile(hFind, &ffd) != 0);
 
   dwError = GetLastError();
   if (dwError != ERROR_NO_MORE_FILES) 
   {
      DisplayErrorBox(TEXT("FindFirstFile"));
   }

   FindClose(hFind);
   return dwError;
}


void DisplayErrorBox(LPTSTR lpszFunction) 
{ 
    // Retrieve the system error message for the last-error code

    LPVOID lpMsgBuf;
    LPVOID lpDisplayBuf;
    DWORD dw = GetLastError(); 

    FormatMessage(
        FORMAT_MESSAGE_ALLOCATE_BUFFER | 
        FORMAT_MESSAGE_FROM_SYSTEM |
        FORMAT_MESSAGE_IGNORE_INSERTS,
        NULL,
        dw,
        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
        (LPTSTR) &lpMsgBuf,
        0, NULL );

    // Display the error message and clean up

    lpDisplayBuf = (LPVOID)LocalAlloc(LMEM_ZEROINIT, 
        (lstrlen((LPCTSTR)lpMsgBuf)+lstrlen((LPCTSTR)lpszFunction)+40)*sizeof(TCHAR)); 
    StringCchPrintf((LPTSTR)lpDisplayBuf, 
        LocalSize(lpDisplayBuf) / sizeof(TCHAR),
        TEXT("%s failed with error %d: %s"), 
        lpszFunction, dw, lpMsgBuf); 
    MessageBox(NULL, (LPCTSTR)lpDisplayBuf, TEXT("Error"), MB_OK); 

    LocalFree(lpMsgBuf);
    LocalFree(lpDisplayBuf);
}

Open in new window

0
 

Author Closing Comment

by:dvplayltd
ID: 36548811
10x
0

Featured Post

IT, Stop Being Called Into Every Meeting

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

Join & Write a Comment

An Outlet in Cocoa is a persistent reference to a GUI control; it connects a property (a variable) to a control.  For example, it is common to create an Outlet for the text field GUI control and change the text that appears in this field via that Ou…
Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
Video by: Grant
The goal of this video is to provide viewers with basic examples to understand and use while-loops in the C programming language.
The viewer will learn how to pass data into a function in C++. This is one step further in using functions. Instead of only printing text onto the console, the function will be able to perform calculations with argumentents given by the user.

758 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

17 Experts available now in Live!

Get 1:1 Help Now