How can you integrate file handling with cloud storage?

Question

ICSM Computer · Answer

To integrate file handling with cloud storage like Azure Blob Storage or
Amazon S3 in C#, you can use their respective SDKs to upload, download, delete, and list files (blobs or objects). Here's a breakdown for each:
1. Azure Blob Storage
dotnet add package Azure.Storage.Blobs
Upload/Download Example:
using Azure.Storage.Blobs;
using System;
using System.IO;
using System.Threading.Tasks;
public class AzureBlobHelper
{
    private readonly BlobServiceClient _blobServiceClient;
    public AzureBlobHelper(string connectionString)
    {
        _blobServiceClient = new BlobServiceClient(connectionString);
    }
    public async Task UploadFileAsync(string containerName, string localFilePath, string blobName)
    {
        var container = _blobServiceClient.GetBlobContainerClient(containerName);
        await container.CreateIfNotExistsAsync();
        var blobClient = container.GetBlobClient(blobName);
        await blobClient.UploadAsync(localFilePath, overwrite: true);
    }
    public async Task DownloadFileAsync(string containerName, string blobName, string downloadPath)
    {
        var blobClient = _blobServiceClient
            .GetBlobContainerClient(containerName)
            .GetBlobClient(blobName);
        await blobClient.DownloadToAsync(downloadPath);
    }
}
2. Amazon S3 (AWS)
dotnet add package AWSSDK.S3
Upload/Download Example:
using Amazon.S3;
using Amazon.S3.Model;
using System;
using System.IO;
using System.Threading.Tasks;
public class S3Helper
{
    private readonly IAmazonS3 _s3Client;
    public S3Helper(string accessKey, string secretKey, string region)
    {
        _s3Client = new AmazonS3Client(accessKey, secretKey, Amazon.RegionEndpoint.GetBySystemName(region));
    }
    public async Task UploadFileAsync(string bucketName, string key, string filePath)
    {
        var request = new PutObjectRequest
        {
            BucketName = bucketName,
            Key = key,
            FilePath = filePath
        };
        await _s3Client.PutObjectAsync(request);
    }
    public async Task DownloadFileAsync(string bucketName, string key, string destinationPath)
    {
        var response = await _s3Client.GetObjectAsync(bucketName, key);
        await using var stream = File.Create(destinationPath);
        await response.ResponseStream.CopyToAsync(stream);
    }
}
Credentials and Security Tips
Use environment variables or secure secrets storage (e.g., Azure Key Vault or AWS Secrets Manager).Avoid hardcoding keys in code. When to Use Each
Feature
Azure Blob
Amazon S3
.NET SDK
Azure.Storage.Blobs
AWSSDK.S3
Access Control
SAS, RBAC
IAM, Bucket Policies
URL Sharing
SAS URLs
Pre-Signed URLs
Serverless
Azure Functions
AWS Lambda

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How can you integrate file handling with cloud storage?

ICSM Computer

Can you answer this question?

1 Answers

1. Azure Blob Storage

Upload/Download Example:

2. Amazon S3 (AWS)

Upload/Download Example:

Credentials & Security Tips

Liked By

Feature	Azure Blob	Amazon S3
.NET SDK	`Azure.Storage.Blobs`	`AWSSDK.S3`
Access Control	SAS, RBAC	IAM, Bucket Policies
URL Sharing	SAS URLs	Pre-Signed URLs
Serverless	Azure Functions	AWS Lambda