AWS SDK Version 3 for .NET
API Reference

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Deletes the specified message from the specified queue. To select the message to delete, use the ReceiptHandle of the message (not the MessageId which you receive when you send the message). Amazon SQS can delete a message from a queue even if a visibility timeout setting causes the message to be locked by another consumer. Amazon SQS automatically deletes messages left in a queue longer than the retention period configured for the queue.

The ReceiptHandle is associated with a specific instance of receiving a message. If you receive a message more than once, the ReceiptHandle is different each time you receive a message. When you use the DeleteMessage action, you must provide the most recently received ReceiptHandle for the message (otherwise, the request succeeds, but the message might not be deleted).

For standard queues, it is possible to receive a message even after you delete it. This might happen on rare occasions if one of the servers which stores a copy of the message is unavailable when you send the request to delete the message. The copy remains on the server and might be returned to you during a subsequent receive request. You should ensure that your application is idempotent, so that receiving a message more than once does not cause issues.

Note:

For .NET Core this operation is only available in asynchronous form. Please refer to DeleteMessageAsync.

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

Syntax

C#
public virtual DeleteMessageResponse DeleteMessage(
         DeleteMessageRequest request
)
Parameters
request
Type: Amazon.SQS.Model.DeleteMessageRequest

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

Return Value
The response from the DeleteMessage service method, as returned by SQS.

Exceptions

ExceptionCondition
InvalidIdFormatException The specified receipt handle isn't valid for the current version.
ReceiptHandleIsInvalidException The specified receipt handle isn't valid.

Examples

This example shows how to delete a message.

Delete message example

var client = new AmazonSQSClient();

var request = new ReceiveMessageRequest
{
  AttributeNames = new List<string>() { "All" },
  MaxNumberOfMessages = 5,
  QueueUrl = "https://sqs.us-east-1.amazonaws.com/80398EXAMPLE/MyTestQueue",
  VisibilityTimeout = (int)TimeSpan.FromMinutes(10).TotalSeconds,
  WaitTimeSeconds = (int)TimeSpan.FromSeconds(5).TotalSeconds
};

var response = client.ReceiveMessage(request);

if (response.Messages.Count > 0)
{
  foreach (var message in response.Messages)
  {
    Console.Write("Message ID '" + message.MessageId + "' ");

    var delRequest = new DeleteMessageRequest
    {
      QueueUrl = "https://sqs.us-east-1.amazonaws.com/80398EXAMPLE/MyTestQueue",
      ReceiptHandle = message.ReceiptHandle
    };

    var delResponse = client.DeleteMessage(delRequest);
  }
}
else
{
  Console.WriteLine("No messages to delete.");
}
      

Version Information

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

See Also