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Master Azure: Build Microsoft Azure Solution with C#

Updating the Code to Add Images to Storage Account

Explore how to update your existing C# API code to upload images to an Azure Storage account. Learn to use the Azure Storage SDK to create containers, upload image files as blobs, and verify uploads through the Azure portal. This lesson helps you understand the integration of Azure Functions and Storage to support image processing in your first Azure solution.

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Preparing the code

Now that we have set up the storage account, our next step is to update our existing code so that the API can upload files to this storage account. Here’s how:

  • In the csproj file, we will add the following NuGet package.
XML
<PackageReference Include="Azure.Storage.Blobs" Version="12.15.0" />

This will allow us to use the Azure storage account SDK.

  • Within the ImageDescriberApi.cs file, we will insert the function given below:
C#
private static async Task UploadFileStreamToStorageAccount(Stream stream, string fileName)
        {
            // Connection string for the Azure storage account
        string connectionString = "{{storageAccountConnectionString}}";
        // Name of the blob container where the file will be uploaded
        string containerName = "images-backup";
        BlobServiceClient blobServiceClient = new BlobServiceClient(connectionString);
        BlobContainerClient containerClient = blobServiceClient.GetBlobContainerClient(containerName);
        await containerClient.CreateIfNotExistsAsync();
        BlobClient blobClient = containerClient.GetBlobClient(fileName);
        await blobClient.UploadAsync(stream, true);
        }

  • The function, named UploadFileStreamToStorageAccount, performs the following operations:

    • ...