Thread: read text file problem

Dear all,



i ;m writing smart device c++ applcation, and here is the code:

Code:

HANDLE hFile = CreateFile (L"\\Temp\\text.txt", GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0,NULL);



if (hFile == INVALID_HANDLE_VALUE)

{

DWORD dw = GetLastError ();

}

else

{

DWORD dwRead = 0;

DWORD dwSize = GetFileSize (hFile, NULL);

 

if (dwSize == -1)
//;//Protokoll(LOG_ERROR, 0, "GetFileSize () fehlgeschlagen");

else if (dwSize == 0)

//;//Protokoll(LOG_ERROR, 0, "Die Datei ist leer");
else

{

 
dwSize = MAX_PATH;

char szFile[MAX_PATH] = "\0";


::ReadFile (hFile, szFile, dwSize, &dwRead, NULL);


wchar_t szFile2[MAX_PATH] = L"\0";

mbstowcs(szFile2,szFile,strlen(szFile)+1);

detailvalue.AddString(szFile2);

CloseHandle(hFile);

}

however the line added in the detailvalue listbox is empty line, does anyone can point out what's wrong with that?

thanks

I believe you need a drive letter for CreateFile. Also, there are a few other changes as indicated below:

Code:

HANDLE hFile = CreateFile (L"C:\\Temp\\text.txt", GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0,NULL);
    if (hFile == INVALID_HANDLE_VALUE)
    {
        DWORD dw = GetLastError ();
        printf("CreateFile failed, error %d\n", dw);
    }
    else
    {
        DWORD dwRead = 0;
        DWORD dwSize = GetFileSize (hFile, NULL);
        if (dwSize == -1)
            printf("dwSize = -1\n"); //;//Protokoll(LOG_ERROR, 0, "GetFileSize () fehlgeschlagen");
        else if (dwSize == 0)
            printf("dwSize = 0\n");  //;//Protokoll(LOG_ERROR, 0, "Die Datei ist leer");
        else
        {
            dwSize = MAX_PATH;
            char szFile[MAX_PATH+1] = {0};            
            ::ReadFile (hFile, szFile, dwSize, &dwRead, NULL);
            wchar_t szFile2[MAX_PATH+1] = {0};
            mbstowcs(szFile2,szFile,strlen(szFile)+1);
            szFile2[MAX_PATH+1] = 0;            
            detailvalue.AddString(szFile2);
            CloseHandle(hFile);
        }
    }