读文件,用CFile::Read整块整块读(比如每次100字节),还要有CFileException的,怎么写?在线等马上结帖

[xiangmin]

读文件,用CFile::Read整块整块读(比如每次100字节),还要有CFileException的
最好成绩把读出的文件格式为("0x%02X"),谢谢~~

[xiangmin]

鹦鹉大哥呢?救命啊

[iamshuke]

CFile file;
CFileException exp;

if(file.Open("c:\\data.dat",CFile::modeRead|CFile::typeBinary|CFile::shareDenyNone,&exp) == FALSE)
{
exp.ReportError(MB_OK|MB_ICONERROR);
//也可以用exp.GetErrorMessage()获得错误信息自己处理
return;
}

void *pBuffer = new BYTE[100];
int nRead;
do {
nRead = file.Read(pBuffer,100);
//对pBuffer进行处理
} while(nRead == 100);

delete []pBuffer;
pBuffer = NULL;

[iamshuke]

至于格式化,你可以把pBuffer转成BYTE*指针,一个字节一个字节的格式化,然后把结果字符串相加,或者用下面的方法快速处理,结果在strResult中.
CString strResult;
CFile file;
if(file.Open(sPath,CFile::modeRead|CFile::typeBinary))
{
BYTE *buf = new BYTE[1024];
UINT nRead;

do
{
nRead = file.Read(buf,1024);
if(nRead > 0)
{
char *pTmp = new char[nRead*2+1];
int nIndex = 0;

CString sTmp;
for(UINT i=0; i<nRead; i++)
{
BYTE n1 = buf[i]/16;
BYTE n2 = buf[i]%16;

pTmp[nIndex++] = (char)(n1 + (n1<=9? '0':('A'-10)));
pTmp[nIndex++] = (char)(n2 + (n2<=9? '0':('A'-10)));
}

pTmp[nIndex] = '\0';
strResult += pTmp;
delete []pTmp;
}
}while(nRead == 1024);

file.Close();

delete []buf;
}

[xiangmin]

辛苦啦~~谢了~~