在Amazon SQS中检查“无可用消息”的最佳方法是什么？

Question

我正在使用Amazon SQS查询新邮件，我正在尝试确定检查“无可用邮件”的最佳方法。

AmazonSQS sqs = new AmazonSQS();  //pseudo code this line
ReceiveMessageRequest receiveMessageRequest = new ReceiveMessageRequest();
receiveMessageRequest.QueueUrl = myQueueUrl;
ReceiveMessageResponse receiveMessageResponse = sqs.ReceiveMessage(receiveMessageRequest);
if (receiveMessageResponse.IsSetReceiveMessageResult())
    {
        //Always TRUE even if there are no untaken messages 
    }

这似乎不是检查“无可用消息”的方法。有关正确检查方法的任何想法？谢谢！

Answer 1

ReceiveMessageResult r = receiveMessageResponse.ReceiveMessageResult;

if (r.Message.Count < 1)
{
  Console.WriteLine("Can't find any visible messages.");
}