AWS SDK Version 3 for .NET
API Reference

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Returns metadata for faces in the specified collection. This metadata includes information such as the bounding box coordinates, the confidence (that the bounding box contains a face), and face ID. For an example, see Listing Faces in a Collection in the Amazon Rekognition Developer Guide.

This operation requires permissions to perform the rekognition:ListFaces action.


For .NET Core and PCL this operation is only available in asynchronous form. Please refer to ListFacesAsync.

Namespace: Amazon.Rekognition
Assembly: AWSSDK.Rekognition.dll
Version: 3.x.y.z


public virtual ListFacesResponse ListFaces(
         ListFacesRequest request
Type: Amazon.Rekognition.Model.ListFacesRequest

Container for the necessary parameters to execute the ListFaces service method.

Return Value
The response from the ListFaces service method, as returned by Rekognition.


AccessDeniedException You are not authorized to perform the action.
InternalServerErrorException Amazon Rekognition experienced a service issue. Try your call again.
InvalidPaginationTokenException Pagination token in the request is not valid.
InvalidParameterException Input parameter violated a constraint. Validate your parameter before calling the API operation again.
ProvisionedThroughputExceededException The number of requests exceeded your throughput limit. If you want to increase this limit, contact Amazon Rekognition.
ResourceNotFoundException The collection specified in the request cannot be found.
ThrottlingException Amazon Rekognition is temporarily unable to process the request. Try your call again.


This operation lists the faces in a Rekognition collection.

To list the faces in a collection

var response = client.ListFaces(new ListFacesRequest 
    CollectionId = "myphotos",
    MaxResults = 20

List faces = response.Faces;


Version Information

.NET Framework:
Supported in: 4.5, 4.0, 3.5

Portable Class Library:
Supported in: Windows Store Apps
Supported in: Windows Phone 8.1
Supported in: Xamarin Android
Supported in: Xamarin iOS (Unified)
Supported in: Xamarin.Forms

See Also