Load document from Amazon S3 Storage

Following example demonstrates how to annotate document from Amazon S3 Storage.

string key = "sample.pdf";
using (Annotator annotator = new Annotator(DownloadFile(key)))
	AreaAnnotation area = new AreaAnnotation()
		Box = new Rectangle(100, 100, 100, 100),
		BackgroundColor = 65535,

private static Stream DownloadFile(string key)
	AmazonS3Client client = new AmazonS3Client();
	string bucketName = "my-bucket";
	GetObjectRequest request = new GetObjectRequest
		Key = key,
		BucketName = bucketName
	using (GetObjectResponse response = client.GetObject(request))
		MemoryStream stream = new MemoryStream();
		stream.Position = 0;
		return stream;
NOTE: Packages AWSSDK.S3 version and AWSSDK.Core version should be referenced

More resources

GitHub Examples

You may easily run the code above and see the feature in action in our GitHub examples:

Free Online App

Along with full-featured .NET library we provide simple but powerful free Apps. You are welcome to annotate your PDF, DOC or DOCX, XLS or XLSX, PPT or PPTX, PNG and other documents with free to use online GroupDocs Annotation App.