AWS SDK Version 2 for .NET
API Reference

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.NET Framework 3.5
Delivers up to ten messages to the specified queue. This is a batch version of SendMessage. The result of the send action on each message is reported individually in the response. The maximum allowed individual message size is 256 KB (262,144 bytes).

The maximum total payload size (i.e., the sum of all a batch's individual message lengths) is also 256 KB (262,144 bytes).

If the DelaySeconds parameter is not specified for an entry, the default for the queue is used.

The following list shows the characters (in Unicode) that are allowed in your message, according to the W3C XML specification. For more information, go to If you send any characters that are not included in the list, your request will be rejected.

#x9 | #xA | #xD | [#x20 to #xD7FF] | [#xE000 to #xFFFD] | [#x10000 to #x10FFFF]

Because the batch request can result in a combination of successful and unsuccessful actions, you should check for batch errors even when the call returns an HTTP status code of 200. Some API actions take lists of parameters. These lists are specified using the param.n notation. Values of n are integers starting from 1. For example, a parameter list with two elements looks like this:



Namespace: Amazon.SQS
Assembly: AWSSDK.dll
Version: (assembly version)


public abstract SendMessageBatchResponse SendMessageBatch(
         String queueUrl,
         List<SendMessageBatchRequestEntry> entries


Type: System.String

The URL of the Amazon SQS queue to take action on.

Type: List<Amazon.SQS.Model.SendMessageBatchRequestEntry>

A list of SendMessageBatchRequestEntry items.

Return Value
Type: Amazon.SQS.Model.SendMessageBatchResponse
The response from the SendMessageBatch service method, as returned by SQS.


BatchEntryIdsNotDistinctException Two or more batch entries have the same Id in the request.
BatchRequestTooLongException The length of all the messages put together is more than the limit.
EmptyBatchRequestException Batch request does not contain an entry.
InvalidBatchEntryIdException The Id of a batch entry in a batch request does not abide by the specification.
TooManyEntriesInBatchRequestException Batch request contains more number of entries than permissible.
UnsupportedOperationException Error code 400. Unsupported operation.

Version Information

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