How To Upload A File To Amazon S3 Using AWS SDK In MVC

Web.Config

<add key="AWSProfileName" value="any name for your profile"/>
<add key="AWSAccessKey" value="Key name"/>
<add key="AWSSecretKey" value="Secret key name"/>
<add key="BucketName" value="Bucket name"/>

Controller code

using Amazon;
using Amazon.Runtime;
using Amazon.S3;
using Amazon.S3.Model;
using Amazon.S3.Transfer;
using System;
using System.Configuration;
using System.IO;
using System.Web;
using System.Web.Mvc;
namespace UploadFileToS3Bucket_UsingAWSSDK.Controllers
{
    public class HomeController : Controller
    {
        private const string keyName = "updatedtestfile.txt";
        private const string filePath = null;
        // Specify your bucket region (an example region is shown).
        private static readonly string bucketName = ConfigurationManager.AppSettings["BucketName"];
        private static readonly RegionEndpoint bucketRegion = RegionEndpoint.USWest2;
        private static readonly string accesskey = ConfigurationManager.AppSettings["AWSAccessKey"];
        private static readonly string secretkey = ConfigurationManager.AppSettings["AWSSecretKey"];
        public ActionResult Index()
        {
            return View();
        }
        [HttpGet]
        public ActionResult UploadFile()
        {
            return View();
        }
        [HttpPost]
        public ActionResult UploadFile(HttpPostedFileBase file)
        {
            var s3Client = new AmazonS3Client(accesskey, secretkey, bucketRegion);
            var fileTransferUtility = new TransferUtility(s3Client);
            try
            {
                if (file.ContentLength > 0)
                {                   
                    var filePath = Path.Combine(Server.MapPath("~/Files"), Path.GetFileName(file.FileName));                                       
                    var fileTransferUtilityRequest = new TransferUtilityUploadRequest
                    {
                        BucketName = bucketName,
                        FilePath = filePath,
                        StorageClass = S3StorageClass.StandardInfrequentAccess,
                        PartSize = 6291456, // 6 MB.
                        Key = keyName,
                        CannedACL = S3CannedACL.PublicRead
                    };
                    fileTransferUtilityRequest.Metadata.Add("param1", "Value1");
                    fileTransferUtilityRequest.Metadata.Add("param2", "Value2");
                    fileTransferUtility.Upload(fileTransferUtilityRequest);
                    fileTransferUtility.Dispose();
                }
                ViewBag.Message = "File Uploaded Successfully!!";
            }
            catch (AmazonS3Exception amazonS3Exception)
            {
                if (amazonS3Exception.ErrorCode != null &&
                    (amazonS3Exception.ErrorCode.Equals("InvalidAccessKeyId")
                    ||
                    amazonS3Exception.ErrorCode.Equals("InvalidSecurity")))
                {
                    ViewBag.Message = "Check the provided AWS Credentials.";
                }
                else
                {
                    ViewBag.Message = "Error occurred: " + amazonS3Exception.Message;
                }
            }
            return RedirectToAction("S3Sample");
        }
    }
}

Run the application

Browse the file from the system and hit the Upload button.

Log in to AWS go to S3 and check if the file has been uploaded or not.

Conclusion

In this article, we have learned how to upload a file to an S3 bucket using ASWSDK in MVC.