文件读写简单实例---拷贝文件

CFile file,srcfile;                                                 
    CString snewPath;
    srcfile.Open(sPathname,CFile::modeRead,NULL);          //假如 sPathname="c:/test.doc"
    int srcLen=srcfile.GetLength();
    CString s1=sFilename.Right(sFilename.GetLength()-sFilename.Find(".",0));
    snewPath=sPathname.Left((sPathname.GetLength()-sFilename.GetLength()))+"copy1"+sFilename.Right(sFilename.GetLength()-sFilename.Find(".",0));
    file.Open(snewPath,CFile::modeCreate|CFile::modeWrite,NULL);
    int Block=srcLen/100;    
    int ProgressSize=0;
    buf=new char[Block];
    m_Progress.SetRange32(0,srcLen);   //m_Progress为进度条成员变量
    m_Progress.SetPos(0);
    for(;;)
    ...{
        srcfile.Read(buf,Block);                 //一次读Block大小字节
        file.Write(buf,Block);
        ProgressSize+=Block;
        m_Progress.SetPos(ProgressSize);
        if((srcLen-ProgressSize)<Block) //最后全部读出
        ...{
            delete[] buf;
            buf=new char[srcLen-ProgressSize];
            srcfile.Read(buf,(srcLen-ProgressSize));
            file.Write(buf,(srcLen-ProgressSize));
            ProgressSize+=Block;
            m_Progress.SetPos(ProgressSize);
            break;
        }
        
    }
    srcfile.Close();
    file.Close();