Upload and download file to and from Storage account

dotnet add Microsoft.Azure.Storage.Blob

Object model

Azure Blob storage is optimized for storing massive amounts of unstructured data. Unstructured data is data that does not adhere to a particular data model or definition, such as text or binary data. Blob storage offers three types of resources:

• The storage account
• A container in the storage account
• A blob in the container

The following diagram shows the relationship between these resources.

Use the following .NET classes to interact with these resources:

• BlobServiceClient: The BlobServiceClient class allows you to manipulate Azure Storage resources and blob containers.
• BlobContainerClient: The BlobContainerClient class allows you to manipulate Azure Storage containers and their blobs.
• BlobClient: The BlobClient class allows you to manipulate Azure Storage blobs.
• BlobDownloadInfo: The BlobDownloadInfo class represents the properties and content returned from downloading a blob.

Download blobs

Download the previously created blob by calling the DownloadAsync method. The example code adds a suffix of “DOWNLOADED” to the file name so that you can see both files in local file system.

if (CloudStorageAccount.TryParse(configs.StorageConnectionString, out var storageAccount))
{
    var blobClient = storageAccount.CreateCloudBlobClient();
    var container = blobClient.GetContainerReference(configs.StorageContainerName);
    var blob = container.GetBlockBlobReference(configs.SqliteDbName);
    await blob.DownloadToFileAsync($".\\{configs.SqliteDbName}", FileMode.Create);
}

Upload blobs