Use Windows API to create and edit a. ini file

1. There are two types of Apis related to the. ini file:

1) Operating System Configuration File win. ini Function

GetProfileSectionGetProfileStringGetProfileIntWriteProfileSectionWriteProfileString

2) operate the User-Defined configuration file privateprofile. ini Function

GetPrivateProfileSectionNamesGetPrivateProfileSectionGetPrivateProfileStringGetPrivateProfileIntGetPrivateProfileStructWritePrivateProfileSectionWritePrivateProfileStringWritePrivateProfileStruct

2. Sample Code for operating APIs related to user-defined configuration files

# Include <windows. h> # include <tchar. h> # include <strsafe. h> # pragma comment (Lib, "strsafe. lib ") # define ini_file_name _ T (" ini_test.ini ") tchar ginifilefullpath [max_path] = {_ T ('\ 0')}; int main () {DWORD dwret = 0; bool Bret = false; // obtain the full path of the INI file dwret =: getmodulefilename (null, ginifilefullpath, max_path); If (0ul = dwret) {_ ftprintf (stderr, _ T ("error: error occurs in calling getmodulefilename, ") _ T (" error code is % lu. \ n "),: getlasterror (); Return-1;} If (max_path = dwret & error_insufficient_buffer =: getlasterror () {_ ftprintf (stderr, _ T ("error: the buffer is too small to hold the module name. \ n "); Return-1;} _ tprintf (_ T (" the full path for the current module is: \ n \ t % s \ n "), ginifilefullpath); DWORD dwloopidx = dwret-1; while (ginifilefullpath [dwloopidx]! = _ T ('\') {-- dwloopidx; }:: stringcchcopy (ginifilefullpath + (dwloopidx + 1), max_path-(dwloopidx + 1), ini_file_name ); _ tprintf (_ T ("the full path for % s is: \ n \ t % s \ n"), ini_file_name, ginifilefullpath); // specify writeprivateprofilesection // note: if ginifilefullpath indicates. if the INI file does not exist, A. ini file is created first. tchar szinsertedkeyvaluepair [1024] = {_ T ('\ 0')}; # If defined (_ Unicode) | defined (UNICODE) wchar_t * DEST = NULL; wchar_t * src = NULL; size_t COUNT = 0; DEST = Hangzhou; src = l "key11 = defaultvalue11"; Count = wcslen (L "key11 = defavaluvalue11"); wmemcpy (DEST, SRC, count); DEST + = count; src = l "\ 0"; Count = 1; wmemcpy (DEST, SRC, count); DEST + = count; src = l "key12 = defaultvalue12"; Count = wcslen (L "key12 = defaultvalue12"); wmemcpy (DEST, SRC, count); DEST + = count; src = l "\ 0"; Count = 1; wmemcpy (DEST, SRC, count); DEST + = count; src = l "key13 = defaultvalue13 "; count = wcslen (L "key13 = defaultvalue13"); wmemcpy (DEST, SRC, count); DEST + = count; src = l "\ 0"; Count = 1; wmemcpy (DEST, SRC, count); # else char * DEST = NULL; char * src = NULL; size_t COUNT = 0; DEST = szinsertedkeyvaluepair; src = "key11 = defaultvalue11 "; count = strlen ("key11 = defaultvalue11"); memcpy (static_cast <void *> (DEST), static_cast <void *> (SRC), count); DEST + = count; src = "\ 0"; Count = 1; memcpy (static_cast <void *> (DEST), static_cast <void *> (SRC), count); DEST + = count; src = "key12 = defaultvalue12"; Count = strlen ("key12 = defavaluvalue12"); memcpy (static_cast <void *> (DEST), static_cast <void *> (SRC ), count); DEST + = count; src = "\ 0"; Count = 1; memcpy (static_cast <void *> (DEST), static_cast <void *> (SRC ), count); DEST + = count; src = "key13 = defaultvalue13"; Count = strlen ("key13 = defavaluvalue13"); memcpy (static_cast <void *> (DEST ), static_cast <void *> (SRC), count); DEST + = count; src = "\ 0"; Count = 1; memcpy (static_cast <void *> (DEST ), static_cast <void *> (SRC), count); # endif // defined (_ Unicode) | defined (UNICODE) Bret = :: writeprivateprofilesection (_ T ("Section1"), partial, ginifilefullpath); If (false = BRET) {_ ftprintf (stderr, _ T ("error: error occurs in calling writeprivateprofilesection, ") _ T (" error code is % lu. \ n "),: getlasterror (); Return-1 ;} // required writeprivateprofilesection // required writeprivateprofilestring tchar szstr4int [10] = {_ T ('\ 0')}; _ itot (-77, szstr4int, 10); Bret = :: writeprivateprofilestring (_ T ("Section1"), _ T ("key12"), szstr4int, ginifilefullpath); If (false = BRET) {_ ftprintf (stderr, _ T ("error: error occurs in calling writeprivateprofilestring,") _ T ("error code is % lu. \ n "),: getlasterror (); Return-1;} BRET =: writeprivateprofilestring (_ T (" Section1 "), _ T (" key13 "), _ T ("value13"), ginifilefullpath); If (false = BRET) {_ ftprintf (stderr, _ T ("error: error occurs in calling writeprivateprofilestring ,") _ T ("error code is % lu. \ n "),: getlasterror (); Return-1 ;} // required writeprivateprofilestring // required parameter tchar szreturnbuffer [1024] = {_ T ('\ 0')}; dwret =: getprivateprofilesectionnames (szreturnbuffer, 1024, ginifilefullpath ); if (1024-2 = dwret) {_ ftprintf (stderr, _ T ("error: szreturnbuffer is not large enough ") _ T ("contain all the section names associated with") _ T ("the specified initialization file. \ n "); Return-1;} // ------------------------------------------- getprivateprofilesectionnames // ------------------------------------------------ getprivateprofilesection // append key14 = defaultvalue14 dwret = :: getprivateprofilesection (_ T ("Section1"), szreturnbuffer, 1024, ginifilefullpath); If (1024-2 = dwret) {_ ftprintf (stderr, _ T ("error: szreturnbuffer is not large enough to ") _ T (" contain all the key name and value pairs ") _ T (" associated with section1. \ n "); Return-1 ;} # If defined (_ Unicode) | defined (UNICODE) DEST = szreturnbuffer + dwret; src = l "key14 = defaultvalue14"; Count = wcslen (L "key14 = defavaluvalue14 "); wmemcpy (DEST, SRC, count); DEST + = count; src = l "\ 0"; Count = 1; wmemcpy (DEST, SRC, count ); # else DEST = szreturnbuffer + dwret; src = "key14 = defaultvalue14"; Count = strlen ("key14 = defaultvalue14"); memcpy (static_cast <void *> (DEST ), static_cast <void *> (SRC), count); DEST + = count; src = "\ 0"; Count = 1; memcpy (static_cast <void *> (DEST ), static_cast <void *> (SRC), count); # endif // defined (_ Unicode) | defined (UNICODE) Bret = :: substring (_ T ("Section1"), szreturnbuffer, ginifilefullpath); If (false = BRET) {_ ftprintf (stderr, _ T ("error: error occurs in calling writeprivateprofilesection, ") _ T (" error code is % lu. \ n "),: getlasterror (); Return-1;} // getprivateprofilesection // ------------------------------------------------ writeprivateprofilesection // In. append section2 zeromemory (static_cast <void *> (szinsertedkeyvaluepair), sizeof (szinsertedkeyvaluepair) to the end of the INI file; # If defined (_ Unicode) | defined; src = l "key21 = defaultvalue21"; Count = wcslen (L "key21 = defaultvalue21"); wmemcpy (DEST, SRC, count); DEST + = count; src = l "\ 0"; Count = 1; wmemcpy (DEST, SRC, count); DEST + = count; src = l "key22 = defaultvalue22 "; count = wcslen (L "key22 = defaultvalue22"); wmemcpy (DEST, SRC, count); DEST + = count; src = l "\ 0"; Count = 1; wmemcpy (DEST, SRC, count); # else DEST = szinsertedkeyvaluepair; src = "key21 = defaultvalue21"; Count = strlen ("key21 = defaultvalue21 "); memcpy (static_cast <void *> (DEST), static_cast <void *> (SRC), count); DEST + = count; src = "\ 0"; Count = 1; memcpy (static_cast <void *> (DEST), static_cast <void *> (SRC), count); DEST + = count; src = "key22 = defavaluvalue22 "; count = strlen ("key22 = defaultvalue22"); memcpy (static_cast <void *> (DEST), static_cast <void *> (SRC), count); DEST + = count; src = "\ 0"; Count = 1; memcpy (static_cast <void *> (DEST), static_cast <void *> (SRC), count ); # endif // defined (_ Unicode) | defined (UNICODE) Bret =: writeprivateprofilesection (_ T ("section2"), szinsertedkeyvaluepair, ginifilefullpath ); if (false = BRET) {_ ftprintf (stderr, _ T ("error: error occurs in calling writeprivateprofilesection,") _ T ("error code is % lu. \ n "),: getlasterror (); Return-1;} // ---------------------------------------------------- writeprivateprofilesection // getprivateprofileint // Note: msdn, the returned data type of this function prototype is uint, but it does not mean that it can only return a // unsigned integer value. through this function ,. the negative number in the INI file can be obtained correctly. int nintvalue4key12 =: getprivateprofileint (_ T ("Section1"), _ T ("key12"),-1, ginifilefullpath ); _ tprintf (_ T ("\ nnintvalue4key12 = % I \ n"), nintvalue4key12); // descrigetprivateprofileint // descrigetprivateprofilestring // read value for key11 dwret = :: getprivateprofilestring (_ T ("Section1"), _ T ("key11"), _ T ("key11 key cannot be found in the initialization file. "), szreturnbuffer, max_path, ginifilefullpath); If (max_path-1 = dwret) {_ ftprintf (stderr, _ T (" error: Neither lpappname nor lpkeyname is null ") _ T ("and the supplied destination buffer is too small") _ T ("to hold the requested string. \ n "); Return-1;} If (max_path-2 = dwret) {_ ftprintf (stderr, _ T (" error: either lpappname or lpkeyname is null and ") _ T (" the supplied destination buffer is too small to ") _ T (" hold all the strings. \ n "); Return-1;} _ tprintf (_ T (" \ nvalue for key11 is % S. \ n "), szreturnbuffer); // read value for key12 dwret =: getprivateprofilestring (_ T (" Section1 "), _ T (" key12 "), _ T ("key12 key cannot be found in the initialization file. "), szreturnbuffer, max_path, ginifilefullpath); If (max_path-1 = dwret) {_ ftprintf (stderr, _ T (" error: Neither lpappname nor lpkeyname is null ") _ T ("and the supplied destination buffer is too small") _ T ("to hold the requested string. \ n "); Return-1;} If (max_path-2 = dwret) {_ ftprintf (stderr, _ T (" error: either lpappname or lpkeyname is null and ") _ T (" the supplied destination buffer is too small to ") _ T (" hold all the strings. \ n "); Return-1;} _ tprintf (_ T (" value for key12 is % S. \ n "), szreturnbuffer); // read value for key13 dwret =: getprivateprofilestring (_ T (" Section1 "), _ T (" key13 "), _ T ("key13 key cannot be found in the initialization file. "), szreturnbuffer, max_path, ginifilefullpath); If (max_path-1 = dwret) {_ ftprintf (stderr, _ T (" error: Neither lpappname nor lpkeyname is null ") _ T ("and the supplied destination buffer is too small") _ T ("to hold the requested string. \ n "); Return-1;} If (max_path-2 = dwret) {_ ftprintf (stderr, _ T (" error: either lpappname or lpkeyname is null and ") _ T (" the supplied destination buffer is too small to ") _ T (" hold all the strings. \ n "); Return-1;} _ tprintf (_ T (" value for key13 is % S. \ n "), szreturnbuffer); // ----------------------------------------------------- getprivateprofilestring return 0 ;}

Refer:

1. msdn online documentation

2. VC operations on the INI File