i want to read a txt file

This is a discussion on i want to read a txt file within the Windows Programming forums, part of the Platform Specific Boards category; i have implemented my program now where it gets a file (txt) from the user via an open dialog box ...

  1. #1
    Registered User
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    Nov 2002
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    157

    i want to read a txt file

    i have implemented my program now where it gets a file (txt) from the user via an open dialog box and now i have the file path and title. but, now with this i want to open up and have the capabilities to read the file and get the data from it. i know how to do it with standard c (fopen, fclose, fgets, etc.) but now i'm working through the winapi and i never had to work with files and the winapi before so i am not familiar with the necessary functions i will need.

    anybody know these functions and params and the such? thanks!

  2. #2
    &TH of undefined behavior Fordy's Avatar
    Join Date
    Aug 2001
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    5,786
    If your happy with fopen and the rest then use them.....there's nothing from stopping you using those funcs for simple file reading/writting

  3. #3

  4. #4
    Registered User SAMSAM's Avatar
    Join Date
    Nov 2001
    Posts
    218
    Just so you know,
    what blank showed you is part of the win API common dialog boxes such as choosefont & choosecolor.

    this one is openfilename common dlg.

    what you do initialize it first(filling out the structure of type ofn)

    then use function GetOpenFileName(,,,,) to open a file for you.

    its simple and very handy and safe.

    below is an example;


    Code:
    #include <windows.h>
    #include <commdlg.h>
    
    static OPENFILENAME ofn ;
    
    void FileInitialize (HWND hwnd)
    {
         static char szFilter[] = TEXT ("Text Files (*.TXT)\0*.txt\0")  \
                                   TEXT ("ASCII Files (*.ASC)\0*.asc\0") \
                                   TEXT ("All Files (*.*)\0*.*\0\0") ;
         
         ofn.lStructSize       = sizeof (OPENFILENAME) ;
         ofn.hwndOwner         = hwnd ;
         ofn.hInstance         = NULL ;
         ofn.lpstrFilter       = szFilter ;
         ofn.lpstrCustomFilter = NULL ;
         ofn.nMaxCustFilter    = 0 ;
         ofn.nFilterIndex      = 0 ;
         ofn.lpstrFile         = NULL ;          //  Open and Close functions
         ofn.nMaxFile          = MAX_PATH ;
         ofn.lpstrFileTitle    = NULL ;          // Open and Close functions
         ofn.nMaxFileTitle     = MAX_PATH ;
         ofn.lpstrInitialDir   = NULL ;
         ofn.lpstrTitle        = NULL ;
         ofn.Flags             = 0 ;             //  Open and Close functions
         ofn.nFileOffset       = 0 ;
         ofn.nFileExtension    = 0 ;
         ofn.lpstrDefExt       = TEXT ("txt") ;
         ofn.lCustData         = 0L ;
         ofn.lpfnHook          = NULL ;
         ofn.lpTemplateName    = NULL ;
    }
    
    BOOL FileOpenDlg (HWND hwnd, PTSTR pstrFileName, PTSTR pstrTitleName)
    {
         ofn.hwndOwner         = hwnd ;
         ofn.lpstrFile         = pstrFileName ;
         ofn.lpstrFileTitle    = pstrTitleName ;
         ofn.Flags             = OFN_HIDEREADONLY | OFN_CREATEPROMPT ;
         
         return GetOpenFileName (&ofn) ;
    }
    
    BOOL filesavedlg (HWND hwnd, PTSTR pstrFileName, PTSTR pstrTitleName)
    {
         ofn.hwndOwner         = hwnd ;
         ofn.lpstrFile         = pstrFileName ;
         ofn.lpstrFileTitle    = pstrTitleName ;
         ofn.Flags             = OFN_OVERWRITEPROMPT ;
         
         return GetSaveFileName (&ofn) ;
    }

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