LLuploadFileDotNet
Upload a File to an S3 Bucket Using the AWS SDK for .NET (Low-Level API)
The following C# example shows how to use the low-level AWS SDK for .NET multipart upload API to upload a file to an S3 bucket. For information about Amazon S3 multipart uploads, see Multipart Upload Overview.
Note
When you use the AWS SDK for .NET API to upload large objects, a timeout might occur while data is being written to the request stream. You can set an explicit timeout using the UploadPartRequest.
The following C# example uploads a file to an S3 bucket using the low-level multipart upload API. For information about the example's compatibility with a specific version of the AWS SDK for .NET and instructions for creating and testing a working sample, see Running the Amazon S3 .NET Code Examples.
using Amazon.Runtime;
using Amazon.S3;
using Amazon.S3.Model;
using System;
using System.Collections.Generic;
using System.IO;
using System.Threading.Tasks;
namespace Amazon.DocSamples.S3
{
class UploadFileMPULowLevelAPITest
{
private const string bucketName = "*** provide bucket name ***";
private const string keyName = "*** provide a name for the uploaded object ***";
private const string filePath = "*** provide the full path name of the file to upload ***";
// Specify your bucket region (an example region is shown).
private static readonly RegionEndpoint bucketRegion = RegionEndpoint.USWest2;
private static IAmazonS3 s3Client;
public static void Main()
{
s3Client = new AmazonS3Client(bucketRegion);
Console.WriteLine("Uploading an object");
UploadObjectAsync().Wait();
}
private static async Task UploadObjectAsync()
{
// Create list to store upload part responses.
List<UploadPartResponse> uploadResponses = new List<UploadPartResponse>();
// Setup information required to initiate the multipart upload.
InitiateMultipartUploadRequest initiateRequest = new InitiateMultipartUploadRequest
{
BucketName = bucketName,
Key = keyName
};
// Initiate the upload.
InitiateMultipartUploadResponse initResponse =
await s3Client.InitiateMultipartUploadAsync(initiateRequest);
// Upload parts.
long contentLength = new FileInfo(filePath).Length;
long partSize = 5 * (long)Math.Pow(2, 20); // 5 MB
try
{
Console.WriteLine("Uploading parts");
long filePosition = 0;
for (int i = 1; filePosition < contentLength; i++)
{
UploadPartRequest uploadRequest = new UploadPartRequest
{
BucketName = bucketName,
Key = keyName,
UploadId = initResponse.UploadId,
PartNumber = i,
PartSize = partSize,
FilePosition = filePosition,
FilePath = filePath
};
// Track upload progress.
uploadRequest.StreamTransferProgress +=
new EventHandler<StreamTransferProgressArgs>(UploadPartProgressEventCallback);
// Upload a part and add the response to our list.
uploadResponses.Add(await s3Client.UploadPartAsync(uploadRequest));
filePosition += partSize;
}
// Setup to complete the upload.
CompleteMultipartUploadRequest completeRequest = new CompleteMultipartUploadRequest
{
BucketName = bucketName,
Key = keyName,
UploadId = initResponse.UploadId
};
completeRequest.AddPartETags(uploadResponses);
// Complete the upload.
CompleteMultipartUploadResponse completeUploadResponse =
await s3Client.CompleteMultipartUploadAsync(completeRequest);
}
catch (Exception exception)
{
Console.WriteLine("An AmazonS3Exception was thrown: { 0}", exception.Message);
// Abort the upload.
AbortMultipartUploadRequest abortMPURequest = new AbortMultipartUploadRequest
{
BucketName = bucketName,
Key = keyName,
UploadId = initResponse.UploadId
};
await s3Client.AbortMultipartUploadAsync(abortMPURequest);
}
}
public static void UploadPartProgressEventCallback(object sender, StreamTransferProgressArgs e)
{
// Process event.
Console.WriteLine("{0}/{1}", e.TransferredBytes, e.TotalBytes);
}
}
}