/// <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!"); }
/// <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!"); }