想要使用新的 sdk - Azure.Storage.Blobs package 从 blob 内的文件夹下载和上传文件

Question

I want to download and upload a json file in a folder by using path and jsonContent in string for in new sdk - Azure.Storage.Blobs package. I am able to do so using old library as per below code -

UploadCode -

`public async Task<bool> UploadToBlob(string path, string jsonContentString)
    {
        CloudBlobContainer container = _cloudBlobClient.GetContainerReference(Constant.ContainerName);
        CloudBlockBlob blockBlob = container.GetBlockBlobReference("dose/NotificationDefinition/dose_dosedailyreport.json");
        await blockBlob.UploadTextAsync(jsonContentString);
        return true;
    }`

Download Code -

public async Task<string> GetDataFromStorage()
    {
        CloudBlobContainer container = _cloudBlobClient.GetContainerReference(Constant.ContainerName);
        var blockBlob = container.GetBlockBlobReference("dose/NotificationDefinition/dose_dosedailyreport.json");
        return await blockBlob.DownloadTextAsync();
    }

Answer 1

Try the following code. Basically we're creating an instance of BlockBlobClient and calling it's Upload and Download method for uploading and downloading.

    static void UploadDownloadTest()
    {
        var blobName = "dose/NotificationDefinition/dose_dosedailyreport.json";
        var containerName = "test";
        var connectionString = "UseDevelopmentStorage=true";
        var blockBlobClient = new BlockBlobClient(connectionString, containerName, blobName);
        var jsonContentString = "This is the data I wish to upload";
        using (var ms = new MemoryStream(Encoding.UTF8.GetBytes(jsonContentString)))
        {
            var httpHeaders = new BlobHttpHeaders()
            {
                ContentType = "application/json"
            };
            blockBlobClient.Upload(ms, httpHeaders);
        }
        Console.WriteLine("Upload Successful!");
        var downloadResponse = blockBlobClient.Download().Value;
        using (var stream = downloadResponse.Content)
        {
            byte[] buffer = new byte[downloadResponse.ContentLength];
            stream.Read(buffer, 0, buffer.Length);
            var responseData = Encoding.UTF8.GetString(buffer);
            Console.WriteLine("Blob contents....");
            Console.WriteLine(responseData);
        }
    }