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Amazon Simple Storage Service
Developer Guide (API Version 2006-03-01)

Listing Keys Using the AWS SDK for .NET

The following C# example lists the object keys for a bucket. In the example, we use pagination to retrieve a set of object keys. If there are more keys to return, Amazon S3 includes a continuation token in the response. The code uses the continuation token in the subsequent request to fetch the next set of object keys.

For instructions on how to create and test a working sample, see Running the Amazon S3 .NET Code Examples.

// Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved. // SPDX-License-Identifier: MIT-0 (For details, see https://github.com/awsdocs/amazon-s3-developer-guide/blob/master/LICENSE-SAMPLECODE.) using Amazon.S3; using Amazon.S3.Model; using System; using System.Threading.Tasks; namespace Amazon.DocSamples.S3 { class ListObjectsTest { private const string bucketName = "*** bucket name ***"; // Specify your bucket region (an example region is shown). private static readonly RegionEndpoint bucketRegion = RegionEndpoint.USWest2; private static IAmazonS3 client; public static void Main() { client = new AmazonS3Client(bucketRegion); ListingObjectsAsync().Wait(); } static async Task ListingObjectsAsync() { try { ListObjectsV2Request request = new ListObjectsV2Request { BucketName = bucketName, MaxKeys = 10 }; ListObjectsV2Response response; do { response = await client.ListObjectsV2Async(request); // Process the response. foreach (S3Object entry in response.S3Objects) { Console.WriteLine("key = {0} size = {1}", entry.Key, entry.Size); } Console.WriteLine("Next Continuation Token: {0}", response.NextContinuationToken); request.ContinuationToken = response.NextContinuationToken; } while (response.IsTruncated); } catch (AmazonS3Exception amazonS3Exception) { Console.WriteLine("S3 error occurred. Exception: " + amazonS3Exception.ToString()); Console.ReadKey(); } catch (Exception e) { Console.WriteLine("Exception: " + e.ToString()); Console.ReadKey(); } } } }