在SDK中，获得一个文件大小或长度的API函数是多少？

[catclaw]

在SDK中，获得一个文件大小或长度的API函数是多少，帮忙的各位大哥的麻烦您把后面的参数也写上，谢谢！

[xfxfxf]

GetFileSize

[李马]

DWORD GetFileSize(
HANDLE hFile, // handle of file to get size of
LPDWORD lpFileSizeHigh
// pointer to high-order word for file size
);
Parameters
hFile
Specifies an open handle of the file whose size is being returned. The handle must have been created with either GENERIC_READ or GENERIC_WRITE access to the file.
lpFileSizeHigh
Pointer to the variable where the high-order word of the file size is returned. This parameter can be NULL if the application does not require the high-order word.
Return Values
If the function succeeds, the return value is the low-order doubleword of the file size, and, if lpFileSizeHigh is non-NULL, the function puts the high-order doubleword of the file size into the variable pointed to by that parameter.

If the function fails and lpFileSizeHigh is NULL, the return value is 0xFFFFFFFF. To get extended error information, call GetLastError.

If the function fails and lpFileSizeHigh is non-NULL, the return value is 0xFFFFFFFF and GetLastError will return a value other than NO_ERROR.

[wuxfBrave]

HANDLE CreateFile(
LPCTSTR lpFileName,
DWORD dwDesiredAccess,
DWORD dwShareMode,
LPSECURITY_ATTRIBUTES lpSecurityAttributes,
DWORD dwCreationDisposition,
DWORD dwFlagsAndAttributes,
HANDLE hTemplateFile
);

DWORD GetFileSize(
HANDLE hFile,
LPDWORD lpFileSizeHigh
);

一个函数搞不定，先用CreateFile打开文件，然后再取得大小参数的含义请查看MSDN

[program2100]

DWORD GetFileSize(
HANDLE hFile, // handle of file to get size of
LPDWORD lpFileSizeHigh
// pointer to high-order word for file size
);
不过我记得C语言下也能得到，具体函数在MSDN里找

[FAICHEN]

createfile
readfile

[stavck]

一个例子：
struct _stat buf;
int result;
CString strCreateTime;
CString strModTime;
CString strLen;
/* Get data associated with "stat.c": */
result = _stat( strFile.GetBuffer(1), &buf );

/* Check if statistics are valid: */
if( result != 0 )
{
CString strError;
strError.Format(_T("取得文件信息时错误,文件（%s）"), strFile);
return;
}
else
{
strLen.Format(_T("%ld"), buf.st_size);
strCreateTime.Format(_T("%s"), ctime( &buf.st_ctime));
CTime ctm(buf.st_mtime);

strModTime.Format(_T("%04d-%02d-%02d %02d:%02d:%02d"), ctm.GetYear(), ctm.GetMonth(), ctm.GetDay(), ctm.GetHour(), ctm.GetMinute(), ctm.GetSecond());

}

[xiaohedou]

看了！

[withpointer]

同意楼上几位的，但是注意如果用GetFileSize来得到一个文件的大小,在此之前一定要用CreateFile打开文件,这是WIN32的方法

还有一种就是标准C函数方法,先用fopen打开文件,然后用fseek将文件的指针放到文件的结尾处,最后使用ftell得到当前的指针位置(既文件的大小);
具体代码见下,写的匆忙见笑了！
#include <stdio.h>
long cGetFileSize (const char *FileName)
{
//返回-1为失败
long lngSize;
FILE *fp = fopen(FileName,"r");
if (fp == NULL) return -1;

if (fseek(fp,SEEK_END,0) !=0) return -1;
lngSize = ftell(fp);
return lngSize;
}

[withpointer]

忘了,最后在return lngSize;前面加上fclose(fp);抱歉!

[fbmsf]

我晕了，各位，
为什么不用， findclose(FindFirstFile("c:\1.txt",wfd))
wfd.nFileSizeHigh; wfd.nFileSizeLow;
不是大小是什么？？

[fbmsf]

顺便还可以得到其他信息，多好。