文件拷贝后变成这样了(请各位支支招)

Question

我用BinaryWriter 和FileStream 拷贝u盘的文件到目录 出现这样的情况

Answer 1

U盘里有这个图片(B-PNG_LI-26.png,B-JPEG_M-19.jpeg )
拷贝到目录后变成了
B-PNG_LI-26.png,
B-JPEG_M-19.jpeg 
..B-PNG_LI-26.png.jpg,
...B-PNG_LI-26.png.jpg.jpg,
...B-PNG_LI-26.png.jpg.jpg.jpg,
....B-PNG_LI-26.png.jpg.jpg.jpg.jpg,"..B-PNG_LI-26.png.jpg,
...B-PNG_LI-26.png.jpg.jpg,
...B-PNG_LI-26.png.jpg.jpg.jpg,
....B-PNG_LI-26.png.jpg.jpg.jpg.jpg,"这些都是隐藏的 并且大小也要比
B-PNG_LI-26.png小一些

Answer 2

 if (!File.Exists(source_file))
            {
                return;
            }            byte[] bytTemp = new byte[4096];//字节数组            //long lngHad = 0;
            long lngHad = _currentSize;
            long lngCount;
            int z = 5000;            //源文件流
            System.IO.FileStream fsSource = new System.IO.FileStream(source_file, System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.Read, 4);
            //二进制读取器
            System.IO.BinaryReader bRead = new System.IO.BinaryReader(fsSource);
            //定位源文件流的头部
            bRead.BaseStream.Seek(0, System.IO.SeekOrigin.Begin);
            if (fsSource.Position > 0)
                fsSource.Position = 0;            lngCount = _totalSize;
            //目标文件流
            System.IO.FileStream fsAim = new System.IO.FileStream(aim_file, System.IO.FileMode.Create, System.IO.FileAccess.Write, System.IO.FileShare.Write, 4);            //二进制写入器
            System.IO.BinaryWriter bWrite = new System.IO.BinaryWriter(fsAim);            while (z >= 4096)
            {
                z = (int)bRead.Read(bytTemp, 0, bytTemp.Length);//读入字节数组,返回读取的字节数量，如果小于4096，则到了文件尾
                bWrite.Write(bytTemp, 0, z);//从字节数组写入目标文件流                lngHad += z;
                string show = "From " + source_file + "\n" + "to " + aim_file;
                OnCopyFile(lngHad, lngCount);//触发事件 来控制主线程 这里是进度条和已完成复制文件字节显示   
            }            _currentSize = lngHad;            bWrite.Flush();//清理缓存区            bWrite.Close();
            bRead.Close();            fsAim.Close();
            fsSource.Close();            //修改文件时间以保持与源文件一致
            System.IO.File.SetCreationTime(aim_file, System.IO.File.GetCreationTime(source_file));
            System.IO.File.SetLastWriteTime(aim_file, System.IO.File.GetLastWriteTime(source_file));
            System.IO.File.SetLastAccessTime(aim_file, System.IO.File.GetLastAccessTime(source_file));
            //目标文件的属性与源文件一致
            System.IO.File.SetAttributes(aim_file, System.IO.File.GetAttributes(source_file));

Answer 3

呵呵,看到图片了.你把copy的代码贴出来看看吧.
是不是循环出错了.

Answer 4

//判断文件
        private string FileCheck(string source_file, string aim_file)
        {
            long souLong = new System.IO.FileInfo(source_file).Length;
            if (System.IO.File.Exists(aim_file))
            {
                long aimLong = new System.IO.FileInfo(aim_file).Length;
                DateTime SourceFileDateTime = System.IO.File.GetLastWriteTime(source_file);
                DateTime AimFileDateTime = System.IO.File.GetLastWriteTime(aim_file);
                if (souLong == aimLong)
                {
                    if (SourceFileDateTime.CompareTo(AimFileDateTime) <= 0)
                    {
                        return "not copy";
                    }
                    else
                    {
                        System.IO.File.SetAttributes(aim_file, FileAttributes.Normal);
                        return aim_file;
                    }
                }
                else
                {
                    int leng = source_file.LastIndexOf("\\") + 1;
                    string fileName = source_file.Substring(leng, source_file.Length - leng);                    int len = fileName.LastIndexOf('.');
                    string frontName = fileName.Substring(0, len);
                    string extenName = fileName.Substring(len, fileName.Length - len);
                    string strName = frontName;
                    string sReturn;                    for (int i = 1; ; i++)
                    {
                        strName = frontName + "000" + i.ToString() + extenName;                        sReturn = aim_file.Replace(fileName, strName);                        long sLong, aLong;
                        DateTime sDateTime, aDateTime;                        sLong = new System.IO.FileInfo(source_file).Length;                        if (System.IO.File.Exists(sReturn))
                        {
                            aLong = new System.IO.FileInfo(sReturn).Length;
                            sDateTime = System.IO.File.GetLastWriteTime(source_file);
                            aDateTime = System.IO.File.GetLastWriteTime(sReturn);                            if (sLong == aLong)
                            {
                                if (sDateTime.CompareTo(aDateTime) <= 0)
                                {
                                    return "not copy";
                                }
                                else
                                {
                                    System.IO.File.SetAttributes(sReturn, FileAttributes.Normal);
                                    return sReturn;
                                }
                            }
                        }
                        else
                        {
                            return sReturn;
                        }
                    }
                    // return aim_file;
                }
            }
            else
            {
                return aim_file;
            }
        }
    }原文件 和目标文件对比 返回目标文件名称

Answer 5

如果你是为了练习这么写,就当我这贴不存在.
如果是用在程序中,你只需简单写成:
            string source_file = "E:\\fox.jpg", aim_file = "E:\\f.jpg";
            if (!File.Exists(source_file)) 
            { 
                return; 
            }
            File.WriteAllBytes(aim_file, File.ReadAllBytes(source_file));
            //修改文件时间以保持与源文件一致 
              System.IO.File.SetCreationTime(aim_file, System.IO.File.GetCreationTime(source_file));
            System.IO.File.SetLastWriteTime(aim_file, System.IO.File.GetLastWriteTime(source_file));
            System.IO.File.SetLastAccessTime(aim_file, System.IO.File.GetLastAccessTime(source_file));
            //目标文件的属性与源文件一致 
              System.IO.File.SetAttributes(aim_file, System.IO.File.GetAttributes(source_file));

Answer 6

呵呵 谢谢wdgphc  不能像你说的那样,我要拷贝文件夹下的所有文件,区别是什么文件然后归类