VC中获取文件大小

来源：互联网发布：java语言程序设计2 编辑：程序博客网时间：2024/05/16 17:20

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;
}

0 0