上传文件异常，文件为空

Question

我用stream上传文件到Azure blob中

 byte[] buff = System.IO.File.ReadAllBytes(open.FileName);
System.IO.MemoryStream ms = new System.IO.MemoryStream(buff);

当上传后，我的blob确实空的，我想知道是怎么回事。

Answer 1

Hi,

会不会是你在上传的时候ms.Position的位置位于文件的末尾，请尝试设置ms.Position=0，关于上传文件到Azure blob你可以参考下面的代码。

                        StorageCredentials creds = new StorageCredentials(
                ConfigurationManager.AppSettings["accountName"],
                ConfigurationManager.AppSettings["accountKey"]
                );
            CloudStorageAccount account = new CloudStorageAccount(creds, useHttps: true);
            CloudBlobClient client = account.CreateCloudBlobClient();
            CloudBlobContainer contain = client.GetContainerReference("your container name");
            contain.CreateIfNotExists();
                        CloudBlockBlob blob = contain.GetBlockBlobReference("your blob name");
                        using (var stream = System.IO.File.OpenRead("your file"))
                    blob.UploadFromStream(stream);

关于更多与Azure blob的操作，请阅读http://www.windowsazure.cn/zh-cn/documentation/articles/storage-dotnet-how-to-use-blobs/

Best Regards,
Jambor