Upload a File

The following C# code example uploads a file to an Amazon S3 bucket. For instructions on how to create and test a working sample, see Testing the .NET Code Examples

using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Configuration;
using System.IO;
using Amazon.S3; 
using Amazon.S3.Model; 

namespace s3.amazon.com.docsamples.LowLevel_UploadFromFile
{
    class Program
    {
        // Your AWS Credentials.
        static string AccessKeyID        = "";
        static string SecretAccessKey    = "";

        static string existingBucketName = "*** Provide bucket name";
        static string keyName = "*** Provide object key ***";
        static string filePath = "*** Provide file to upload ***";

         static void Main(string[] args)
        {
            NameValueCollection appConfig = ConfigurationManager.AppSettings;
            AccessKeyID        = appConfig["AWSAccessKey"];
            SecretAccessKey    = appConfig["AWSSecretKey"];

            AmazonS3 s3Client = 
                new AmazonS3Client(AccessKeyID, SecretAccessKey);

            // List to store upload part responses.
            List<UploadPartResponse> uploadResponses = 
                new List<UploadPartResponse>();

            // 1. Initialize.
            InitiateMultipartUploadRequest initiateRequest = 
                new InitiateMultipartUploadRequest()
                .WithBucketName(existingBucketName)
                .WithKey(keyName);

            InitiateMultipartUploadResponse initResponse = 
                s3Client.InitiateMultipartUpload(initiateRequest);

            // 2. Upload Parts.
            long contentLength = new FileInfo(filePath).Length;
            long partSize = 5 * (long)Math.Pow(2, 20); // 5 MB

            try
            {
                long filePosition = 0;
                for (int i = 1; filePosition < contentLength; i++)
                {

                    // Create request to upload a part.
                    UploadPartRequest uploadRequest = new UploadPartRequest()
                        .WithBucketName(existingBucketName)
                        .WithKey(keyName)
                        .WithUploadId(initResponse.UploadId)
                        .WithPartNumber(i)
                        .WithPartSize(partSize)
                        .WithFilePosition(filePosition)
                        .WithFilePath(filePath);

                    // Upload part and add response to our list.
                    uploadResponses.Add(s3Client.UploadPart(uploadRequest));

                    filePosition += partSize;
                }

                // Step 3: complete.
                CompleteMultipartUploadRequest completeRequest = 
                    new CompleteMultipartUploadRequest()
                    .WithBucketName(existingBucketName)
                    .WithKey(keyName)
                    .WithUploadId(initResponse.UploadId)
                    .WithPartETags(uploadResponses);

                CompleteMultipartUploadResponse completeUploadResponse = 
                    s3Client.CompleteMultipartUpload(completeRequest);
 
            }
            catch (Exception exception)
            {
                Console.WriteLine("Exception occurred: {0}", exception.Message);
                s3Client.AbortMultipartUpload(new AbortMultipartUploadRequest()
                    .WithBucketName(existingBucketName)
                    .WithKey(keyName)
                    .WithUploadId(initResponse.UploadId));
            }
        }
    }
}