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

Upload an Object Using the AWS SDK for .NET

The following C# code example creates two objects with two PutObjectRequest requests:

  • The first PutObjectRequest request saves a text string as sample object data. It also specifies the bucket and object key names.

  • The second PutObjectRequest request uploads a file by specifing the file name. This request also specifies the ContentType header and optional object metadata (a title).

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 UploadObjectTest { private const string bucketName = "*** bucket name ***"; // Example creates two objects (for simplicity, we upload same file twice). // You specify key names for these objects. private const string keyName1 = "*** key name for first object created ***"; private const string keyName2 = "*** key name for second object created ***"; private const string filePath = @"*** file path ***"; private static readonly RegionEndpoint bucketRegion = RegionEndpoint.EUWest1; private static IAmazonS3 client; public static void Main() { client = new AmazonS3Client(bucketRegion); WritingAnObjectAsync().Wait(); } static async Task WritingAnObjectAsync() { try { // 1. Put object-specify only key name for the new object. var putRequest1 = new PutObjectRequest { BucketName = bucketName, Key = keyName1, ContentBody = "sample text" }; PutObjectResponse response1 = await client.PutObjectAsync(putRequest1); // 2. Put the object-set ContentType and add metadata. var putRequest2 = new PutObjectRequest { BucketName = bucketName, Key = keyName2, FilePath = filePath, ContentType = "text/plain" }; putRequest2.Metadata.Add("x-amz-meta-title", "someTitle"); } catch (AmazonS3Exception e) { Console.WriteLine( "Error encountered ***. Message:'{0}' when writing an object" , e.Message); } catch (Exception e) { Console.WriteLine( "Unknown encountered on server. Message:'{0}' when writing an object" , e.Message); } } } }