[转]VC++获取文件大小集锦

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
");  
 return 4;  
 }  
 dwFileSize = GetFileSize(hFile, NULL);  
 printf("hFile size: %10d
", 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
",getfilesize());  
     printf("getfilesize01()=%d
",getfilesize01());  
     printf("getfilesize02()=%d
",getfilesize02());  
     printf("getfilesize03()=%d
",getfilesize03());  
     printf("getfilesize04()=%d
",getfilesize04());  
     printf("getfilesize05()=%d
",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;  
 }