文件大小

方法一:
 
WIN32_FIND_DATA fileInfo;
 HANDLE hFind;
 DWORD fileSize;
 const char *fileName = 文件的路径及名字;
 hFind = FindFirstFile(fileName ,&fileInfo);
 if(hFind != INVALID_HANDLE_VALUE)
 fileSize = fileInfo.nFileSizeLow;
 FindClose(hFind);
 
方法二：
 
HANDLE hFile; // the file handle
 DWORD dwFileSize; // temporary storage for file sizes
 
// Create the test file. Open it "Create Always" to overwrite any
 // existing file. The data is re-created below.
 hFile = CreateFile(lpcTheFile, GENERIC_READ | GENERIC_WRITE, 0, NULL,
 CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
 
if (hFile == INVALID_HANDLE_VALUE) {
 printf("hFile is NULL\n");
 return 4;
 }
 dwFileSize = GetFileSize(hFile, NULL);
 printf("hFile size: %10d\n", dwFileSize);
 




**************************************************************************************
 
C和C++获取文件大小的方法总结
 2008年03月31日 星期一 14:21
 1.MFC中的方法：(C++)
 
CFileStatus status;
 CFile::GetStatus("D:\\test.txt",status);
 long lSizeOfFile;
 lSizeOfFile = status.m_size;
 
lSizeOfFile的值就是D:\\test.txt文件的大小
 
2.标准C获得文件大小的5种方法
 (注意："__FILE__"指的是当前文件，你可以改为有效路径的目标文件，比如"D:\\test.txt"）
 #include "stdafx.h"
 #include "stdio.h"
 #include <sys/stat.h>
 #include <io.h>
 #include <FCNTL.H>
 

int getfilesize()
 {
     int iresult;
     struct _stat buf;
     iresult = _stat(__FILE__,&buf);
     if(iresult == 0)
     {
         return buf.st_size;
     }
     return NULL;
 }
 
int getfilesize01()
 {
     int fp;
     fp=_open(__FILE__,_O_RDONLY);
     if(fp==-1)
         return NULL;
     return _filelength(fp);
     //return NULL;
 }
 
int getfilesize02()
 {
     int fp;
     fp=_open(__FILE__,_O_RDONLY);
     if(fp==-1)
         return NULL;
     return _lseek(fp,0,SEEK_END);
     //return NULL;
 }
 
int getfilesize03()
 {
     int fp;
     fp=_open(__FILE__,_O_RDONLY);
     if(fp==-1)
         return NULL;
     return _lseek(fp,0,SEEK_END);
     //return NULL;
 }
 
int getfilesize04()
 {
     FILE *fp;
     if((fp=fopen(__FILE__,"r"))==NULL)
         return 0;
     fseek(fp,0,SEEK_END);
     return ftell(fp);    //return NULL;
 }
 
int getfilesize05()
 {
     FILE *fp;
     char str[1];
     if((fp=fopen(__FILE__,"rb"))==NULL)
         return 0;
     for(int i = 0;!feof(fp);i++)
     {
         fread(&str,1,1,fp);
        
    }
     return i - 1;    //return NULL;
 }
 
int main(int argc, char* argv[])
 {
     printf("getfilesize()=%d\n",getfilesize());
     printf("getfilesize01()=%d\n",getfilesize01());
     printf("getfilesize02()=%d\n",getfilesize02());
     printf("getfilesize03()=%d\n",getfilesize03());
     printf("getfilesize04()=%d\n",getfilesize04());
     printf("getfilesize05()=%d\n",getfilesize05());
     return 0;
 }

 
**************************************************************************************
 VC获取文件夹大小代码:
 
以下是代码片段：
 
DWORD64 GetFolderSize(LPCTSTR szPath, DWORD *dwFiles, DWORD *dwFolders)
 {
 TCHAR szFileFilter[512];
 TCHAR szFilePath[512];
 HANDLE hFind = NULL;
 WIN32_FIND_DATA fileinfo;
 DWORD64    dwSize = 0;
 
strcpy(szFilePath,szPath);
 strcat(szFilePath,"\\");
 strcpy(szFileFilter,szFilePath);
 strcat(szFileFilter,"*.*");
 

hFind = FindFirstFile(szFileFilter,&fileinfo);
 do
 {
    if(fileinfo.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
    {
     if (!strcmp(fileinfo.cFileName,".") || !strcmp(fileinfo.cFileName,".."))
     {
      //Do nothing for "." and ".." folders
     }
     else
     {
      TCHAR sztmp[512];
      strcpy(sztmp,szFilePath);
      strcat(sztmp,fileinfo.cFileName);
      dwSize = dwSize + GetFolderSize(sztmp);
      if(dwFolders != NULL)
      {
       ++(*dwFolders);
      }
     }
    }
    else
    {
     if(dwFiles != NULL)
     {
      ++(*dwFiles);
     }
    }
 
   dwSize += fileinfo.nFileSizeLow;
 
}while(FindNextFile(hFind,&fileinfo));
 
FindClose(hFind);
 return dwSize;
 }