public void Run() { FileRequest fileRequest = new FileRequest(); int status = fileRequest.Download(File.Id, out FileListResponse res); switch (status) { case -20000: TaskStatusDetectionThread.Abort(); DownloadTaskList.SetFailure(File.Key, "请求服务器失败,请稍后再试。"); break; case -20001: TaskStatusDetectionThread.Abort(); DownloadTaskList.SetFailure(File.Key, "请求下载的文件不存在。"); break; case -10000: TaskStatusDetectionThread.Abort(); DownloadTaskList.SetFailure(File.Key, res.message); break; case 0: { string bucket = res.data.tencentCos.bucket; //存储桶,格式:BucketName-APPID string cosPath = res.data.files[0].storageName; //对象在存储桶中的位置标识符,即称对象键 string localDir = File.LocalPath; //本地文件夹 string localFileName = File.FileName; //指定本地保存的文件名 CosService cosService = new CosService(res.data.tencentCos.region); CosXml cosXml = cosService.getCosXml(res.data.token.credentials.tmpSecretId, res.data.token.credentials.tmpSecretKey, res.data.token.credentials.token, res.data.token.expiredTime); TransferConfig transferConfig = new TransferConfig(); TransferManager transferManager = new TransferManager(cosXml, transferConfig); downloadTask = new COSXMLDownloadTask(bucket, cosPath, localDir, localFileName); downloadTask.progressCallback = delegate(long completed, long total) { DownloadTaskList.SetProgress(File.Key, completed, total); Console.WriteLine(String.Format("progress = {0:##.##}%", completed * 100.0 / total)); }; downloadTask.successCallback = delegate(CosResult cosResult) { TaskStatusDetectionThread.Abort(); COSXMLDownloadTask.DownloadTaskResult result = cosResult as COSXMLDownloadTask.DownloadTaskResult; Console.WriteLine("successCallback: " + result.GetResultInfo()); string eTag = result.eTag; DownloadTaskList.SetSuccess(File.Key); }; downloadTask.failCallback = delegate(CosClientException clientEx, CosServerException serverEx) { if (clientEx != null) { Console.WriteLine("CosClientException: " + clientEx); } if (serverEx != null) { Console.WriteLine("CosServerException: " + serverEx.GetInfo()); } TaskStatusDetectionThread.Abort(); DownloadTaskList.SetFailure(File.Key, "COS下载出错。"); }; transferManager.Download(downloadTask); } break; default: TaskStatusDetectionThread.Abort(); DownloadTaskList.SetFailure(File.Key, "未知原因下载失败。"); break; } }