C#Azure AppendBlob AppendBlock添加一个大于4MB限制的文件

Question

var appendBlobClient = containerClient.GetAppendBlobClient(string.Format("{0}/{1}", tenantName, Path.GetFileName(filePath)));

using FileStream uploadFileStream = File.OpenRead(filePath);
appendBlobClient.CreateIfNotExists();
appendBlobClient.AppendBlock(uploadFileStream);
uploadFileStream.Close();

所以我想知道的是上传大文件的最好方法，它似乎必须分块完成，对于追加blobs，可能是4MB，对于块blobs，可能是100MB，但是文档不清楚，也没有示例。

Answer 1

我想感谢@Silent的回应，因为他提供了足够的信息来解决我需要什么。有时候，只要有人说说就能帮我把事情弄清楚。

我在BlockBlobClient.Upload方法中发现的是，它为您分块您的文件流。我相信这是100MB块从我的研究。它似乎有100MB块的限制，其中50,000块

对于AppendBlockClient.AppendBlock，它不会为您分块您的流。它的限制是4MB块和50,000块。

BlobServiceClient blobServiceClient = new BlobServiceClient(azureStorageAccountConnectionString);
BlobContainerClient containerClient = blobServiceClient.GetBlobContainerClient(azureStorageAccountContainerName);
containerClient.CreateIfNotExists();

if (appendData)
{
    var appendBlobClient = containerClient.GetAppendBlobClient(string.Format("{0}/{1}", tenantName, Path.GetFileName(filePath)));

    appendBlobClient.CreateIfNotExists();

    var appendBlobMaxAppendBlockBytes = appendBlobClient.AppendBlobMaxAppendBlockBytes;
    using (var file = File.OpenRead(filePath))
    {
        int bytesRead;
        var buffer = new byte[appendBlobMaxAppendBlockBytes];
        while ((bytesRead = file.Read(buffer, 0, buffer.Length)) > 0)
        {
            //Stream stream = new MemoryStream(buffer);
            var newArray = new Span<byte>(buffer, 0, bytesRead).ToArray();
            Stream stream = new MemoryStream(newArray);
            stream.Position = 0;
            appendBlobClient.AppendBlock(stream);
        }
    }
}
else
{
    var blockBlobClient = containerClient.GetBlockBlobClient(string.Format("{0}/{1}", tenantName, Path.GetFileName(filePath)));

    using FileStream uploadFileStream = File.OpenRead(filePath);
    blockBlobClient.DeleteIfExists();
    blockBlobClient.Upload(uploadFileStream);
    uploadFileStream.Close();
}