从httppostedfile将二进制文件保存到blob

Question

有人可以提供代码将上传的文件保存到二进制文件中的azure blob吗？我目前使用文本保存,这对于大文件来说非常慢,读取/保存到blob,逐行.

Private Function ReadFile(ByVal file As HttpPostedFile) As String
        Dim result As String = ""
        Dim objReader As New System.IO.StreamReader(file.InputStream)
        Do While objReader.Peek() <> -1
            result = result & objReader.ReadLine() & vbNewLine
        Loop
        Return result
    End Function

谢谢

Answer 1

此代码片段基于将照片推送到blob存储的生产应用程序.这种方法直接从HttpPostedFile中提取流,并将其直接交给客户端库以存储到blob中.你应该根据你的应用程序改变一些东西:

• blobName可能需要改编.
• 获取blob客户端的连接字符串应该被隔离到辅助类中
• 同样,您可能希望根据业务逻辑为blob容器提供帮助
• 您可能不希望容器完全可公开访问.如果你愿意的话,这只是为了告诉你如何做到这一点

// assuming HttpPostedFile is in a variable called postedFile  
var contentType = postedFile.ContentType;
var streamContents = postedFile.InputStream;
var blobName = postedFile.FileName

var connectionString = CloudConfigurationManager.GetSetting("YOURSTORAGEACCOUNT_CONNECTIONSTRING");
var storageAccount = CloudStorageAccount.Parse(connectionString);
var blobClient = storageAccount.CreateCloudBlobClient();

var container = blobClient.GetContainerReference("YOURCONTAINERNAME");
container.CreateIfNotExist();
container.SetPermissions(new BlobContainerPermissions { PublicAccess = BlobContainerPublicAccessType.Blob });

var blob = container.GetBlobReference(blobName);
blob.Properties.ContentType = contentType;
blob.UploadFromStream(streamContents);