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ReuploadPart遇到CannotaccessaclosedStream 没人用过吗？补充一些http请求的数据 ---------------------------------------InitiateMultipartUpload的时候返回的http:----------------------- HTTP/1.1 200 OK Date: Fri, 09 Aug 2013 02:21:53 GMT Content-Type: application/xml Connection: close Content-Length: 245 Server: AliyunOSS x-oss-request-id: 52045241493FCD675E644BCB   bucket-mao-sms1   7c34b682-98dc-4f50-bb40-f16c2ea04aa3   A07DE2D002D64BAF82C2AE1B37F32F0E --------------------uploadpart 返回的http:----------------------------------- HTTP/1.1 404 Not Found Content-Type: application/xml Connection: close Content-Length: 380 Date: Fri, 09 Aug 2013 02:22:06 GMT Server: AliyunOSS x-oss-request-id: 5204524E49EDCC20189CE806   NoSuchUpload   The specified upload does not exist. The upload ID may be invalid, or the upload may have been aborted or completed.   A07DE2D002D64BAF82C2AE1B37F32F0E   5204524E49EDCC20189CE806   bucket-mao-sms1.oss.aliyuncs.com ------------------------- ReuploadPart遇到CannotaccessaclosedStream 接到阿里开发的电话，解决了部分问题。在Multipleupload过程中key需要保持不变。 谢谢阿里的及时处理，也希望API文档中能够说明一下。 ------------------------- ReuploadPart遇到CannotaccessaclosedStream 这个是没有问题的代码，希望对以后有需要的人有所帮助。谢谢ali的开发的支持。 static void UploadBig(Bucket bucket, OssClient client)         {             string uploadKey = Guid.NewGuid().ToString();             InitiateMultipartUploadRequest initRequest = new InitiateMultipartUploadRequest(bucket.Name, uploadKey);             var initResult = client.InitiateMultipartUpload(initRequest);             string uploadId = initResult.UploadId;             ConcurrentBag tags = new ConcurrentBag();             using (FileStream fs = File.OpenRead(@'E:\work\Database\surveyMPSDB_Demo-Full Database Backup.bak'))             {                                 long partCount = 6*1024*1024;                                 long count = fs.Length % partCount == 0 ? fs.Length / partCount : fs.Length / partCount   1;                 List tasks = new List();                 for (long i = 1; i                 {                     UploadPartRequest request = new UploadPartRequest(bucket.Name, uploadKey, uploadId);                     Byte[] content = new Byte[partCount];                     int readCount = fs.Read(content, 0, (int)partCount);                     MemoryStream stream = new MemoryStream (content, 0, readCount);                     stream.Seek(0, SeekOrigin.Begin);                     request.InputStream = stream;                     request.PartNumber = (int)i;                     request.PartSize = readCount;                                        var t = Task.Factory.StartNew(() =>                     {                         var upResult = client.UploadPart(request);                         tags.Add(upResult.PartETag);                     }                     );                     tasks.Add(t);                 }                 Task.WaitAll(tasks.ToArray());             }             CompleteMultipartUploadRequest comRequest = new CompleteMultipartUploadRequest (bucket.Name, uploadKey, uploadId);             foreach (var x in tags)             {                 comRequest.PartETags.Add(x);             }             var comResult = client.CompleteMultipartUpload(comRequest);         }