VC获取文件大小

VC获取文件大小!
2008-12-12 08:46

http://hi.baidu.com/vcmfc/blog/item/c8cd58f4ec90d568dcc47446.html

我查到两种方法:

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;
}

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