예제 #1
0
 /// <summary>
 /// 上传文件
 /// </summary>
 /// <param name="fullPath">文件完整路径</param>
 /// <param name="relativePath">相对路径</param>
 /// <param name="system">系统类型</param>
 /// <returns></returns>
 public string UpdateFile(string fullPath, string relativePath, SeatManageSubsystem system)
 {
     //上传出错重试,每次重试50次,每次上传成功,初始化重试次数  2013-9-4 王随
     for (int i = 0; i < 50; i++)
     {
         try
         {
             string     fileName = relativePath; // fullPath.Substring(fullPath.LastIndexOf(@"\") + 1);
             int        maxSiz   = 1024 * 1000;  //设置每次传100k
             FileStream stream   = System.IO.File.OpenRead(fullPath);
             //读取本地文件
             FileSliceInfo file = FileTransportBll.GetFileSliceInfo(fileName, system); //更加文件名,查询服务中是否存在该文件
             if (file == null)                                                         //表示文件不存在
             {
                 file        = new FileSliceInfo();
                 file.Offset = 0; //设置文件从开始位置进行数据传递
             }
             file.Length = stream.Length;
             if (file.Length == file.Offset)
             //如果文件的长度等于文件的偏移量,说明文件已经上传完成 ,重新上传
             {
                 file.Offset = 0; //设置文件从开始位置进行数据传递
             }
             file.Name = fileName;
             while (file.Length != file.Offset)                                                                        //循环的读取文件,上传,直到文件的长度等于文件的偏移量
             {
                 file.Data       = new byte[file.Length - file.Offset <= maxSiz ? file.Length - file.Offset : maxSiz]; //设置传递的数据的大小
                 stream.Position = file.Offset;                                                                        //设置本地文件数据的读取位置
                 stream.Read(file.Data, 0, file.Data.Length);                                                          //把数据写入到file.Data中
                 file = FileTransportBll.FileUpLoad(file, system);                                                     //上传
                 i    = 0;                                                                                             //初始化重试次数
                 if (HandleProgress != null)
                 {
                     int progress = (int)((double)file.Offset / (double)file.Length * 100);
                     HandleProgress(progress);
                 }
             }
             stream.Close();
             stream.Dispose();
             stream = null;
             return("");
         }
         catch
         {
         }
     }
     return("上传失败!");
 }
예제 #2
0
        /// <summary>
        /// 下载文件
        /// 每次下载遇到错误重试50次
        /// </summary>
        /// <param name="filePath">文件的完整</param>
        /// <param name="relativePath">文件的相对路径</param>
        /// <param name="system">系统名称</param>
        /// <returns></returns>
        public string FileDownLoad(string filePath, string relativePath, SeatManageSubsystem system)
        {
            //添加下载错误自动断点下载,每次出错重试50次。 2013-9-4 作者:王随
            for (int i = 0; i < 50; i++)
            {
                //获取文件的路径,已经保存的文件名
                FileStream   fs     = null;
                BinaryWriter writer = null;
                try
                {
                    string        fileName = relativePath;// filePath.Substring(filePath.LastIndexOf(@"\") + 1);
                    string        dirPath  = filePath.Substring(0, filePath.LastIndexOf(@"\") + 1);
                    FileSliceInfo file2    = FileTransportBll.GetFileInfo(fileName, system);
                    if (file2 == null)
                    {
                        if (DownloadError != null)
                        {
                            DownloadError(string.Format("文件{0}下载失败。", fileName));
                        }
                        return(string.Format("文件{0}下载失败。", fileName));
                    }
                    file2.Name   = fileName;
                    file2.Offset = 0;

                    //如果文件目录不存在,创建文件所存放的目录.
                    if (!Directory.Exists(dirPath))
                    {
                        Directory.CreateDirectory(dirPath);
                    }


                    if (File.Exists(filePath))
                    {
                        File.Delete(filePath);
                    }
                    fs = new FileStream(filePath + ".tz", FileMode.OpenOrCreate);

                    file2.Offset = fs.Length;
                    if (file2.Offset != file2.Length)
                    {
                        //文件偏移位置,表示从这个位置开始进行后面的数据添加
                        writer = new BinaryWriter(fs); //初始化文件写入器
                        file2  = FileTransportBll.FileDownLoad(file2, system);
                        i      = 0;                    //下载成功,把重试次数初始化
                        while (file2.Data != null)
                        {
                            //打开文件
                            long Offset = file2.Offset; //file.Offset

                            if (Offset >= int.MaxValue)
                            {
                                writer.Seek(int.MaxValue, SeekOrigin.Begin);
                                Offset = Offset - int.MaxValue;
                                while (Offset > 0)
                                {
                                    if (Offset >= int.MaxValue)
                                    {
                                        writer.Seek(int.MaxValue, SeekOrigin.Current);
                                        Offset = Offset - int.MaxValue;
                                    }
                                    else
                                    {
                                        writer.Seek(int.Parse(Offset.ToString()), SeekOrigin.Current);
                                        Offset = 0;
                                    }
                                }
                            }
                            else
                            {
                                writer.Seek(Int32.Parse(Offset.ToString()), SeekOrigin.Begin);//设置文件的写入位置
                            }

                            writer.Write(file2.Data); //写入数据
                            file2.Offset = fs.Length; //返回追加数据后的文件位置
                            file2.Data   = null;
                            file2        = FileTransportBll.FileDownLoad(file2, system);
                            i            = 0;
                            if (HandleProgress != null)
                            {
                                int progress = (int)(((double)file2.Offset / (double)((long)file2.Length)) * 100);
                                HandleProgress(progress);
                            }
                        }
                        writer.Close();
                        fs.Close();

                        if (File.Exists(filePath + ".tz"))
                        {
                            File.Move(filePath + ".tz", filePath);
                        }
                    }
                    return("");
                }
                catch (Exception ex)
                {
                    if (writer != null)
                    {
                        writer.Close();
                    }
                    if (fs != null)
                    {
                        fs.Close();
                    }
                    // result = false;
                }
            }
            return("下载失败!");
        }