●别以为这道题简单●

Question

做个带进度条的对话框，使FILE *用fread,fwrite一个字节一个字节复制，进度条一个一个增加，嘻嘻，累不累啊……

Answer 1

//copy一个目录下的所有文件(每次读取最长dwReadLen)
//m_CAll为整体进度条m_CFile为当前copy中的文件进度条(类型是:CProgressCtrl)
AfxGetApp()->BeginWaitCursor(); TCHAR lpFileName[MAX_PATH]=_T("D:\\*.*");
WIN32_FIND_DATA FindFileData;  // data buffer
HANDLE hFirst=FindFirstFile(lpFileName,&FindFileData);
LONGLONG llTotalLen=0;
while(::FindNextFile(hFirst,&FindFileData))
{
llTotalLen+=(FindFileData.nFileSizeHigh * ((LONGLONG)MAXDWORD+1)) + FindFileData.nFileSizeLow;
} hFirst=FindFirstFile(lpFileName,&FindFileData);
DWORD dwbuf[0x00004000];
CFile srcFile,dstFile;
DWORD dwReadLen=sizeof(DWORD)*0x0004000,
  dwCount,dwFinish=0;
while(::FindNextFile(hFirst,&FindFileData))
{
if(!(FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY))
{
CString srcFileName("D:\\");
srcFileName+=FindFileData.cFileName;
DWORD dwFinishInFile=0;
LONGLONG llFileLen=(FindFileData.nFileSizeHigh * ((LONGLONG)MAXDWORD+1)) + FindFileData.nFileSizeLow;
srcFile.Open(srcFileName,CFile::modeRead);
CString dstFileName(FindFileData.cFileName);
dstFileName=_T("D:\\temp\\")+dstFileName;
dstFile.Open(dstFileName,CFile::modeWrite | CFile::modeCreate); SetDlgItemText(IDC_STATIC1,dstFileName);
while(dwReadLen==(dwCount=srcFile.Read(dwbuf,dwReadLen)))
{
dstFile.Write(dwbuf,dwCount);
dwFinish+=dwCount;
dwFinishInFile+=dwCount;
m_CAll.SetPos(dwFinish*100/llTotalLen);
m_CFile.SetPos(dwFinishInFile*100/llFileLen);
}
dstFile.Write(dwbuf,dwCount);
dstFile.Close();
srcFile.Close();
dwFinish+=dwCount;
dwFinishInFile+=dwCount;
m_CAll.SetPos(dwFinish*100/llTotalLen);
m_CFile.SetPos(dwFinishInFile*100/llFileLen);
}
} AfxGetApp()->EndWaitCursor();