Azure queue check number of messages

Question

For purposes of our integration checking, I want to count the number of messages on an Azure queue. The method looks like this:

internal void VerifyMessagesOnQueue(string queueNameKey, int expectedNumberOfMessages)
{
    var azureStorageConnectionKey = ConfigurationManager.AppSettings["AzureStorageConnectionKey"];
    var storageAccount = CloudStorageAccount.Parse(azureStorageConnectionKey);
    var queueClient = storageAccount.CreateCloudQueueClient();
    var queue = queueClient.GetQueueReference(ConfigurationManager.AppSettings[queueNameKey]);
    var messages = queue.PeekMessages(int.MaxValue);
    messages.Count().Should().Be(expectedNumberOfMessages);
}

Right now I'm using var messages = queue.PeekMessages(int.MaxValue); to try to get all the messages on a queue. It returns an HTML repsonse 400. I have tried var messages = queue.PeekMessages(expectedNumberOfMessages);, but when expectedNumberOfMessages is 0, I also get an HTML response 400.

How can I reliably check the number of messages on an Azure queue without disrupting it (this is why I was using .PeekMessage)?

Answer 1

I want to count the number of messages on an Azure queue

I suggest you could try the following code to achieve your goal. I have created a console project to test.

StorageConnectionString in App.config:

<appSettings>
    <add key="StorageConnectionString" value="DefaultEndpointsProtocol=https;AccountName=×××;AccountKey=×××" />
</appSettings>

Code in Program.cs:

 static void Main(string[] args)
        {
            string Queue_Name = "myqueue";
            CloudStorageAccount storageAccount = CloudStorageAccount.Parse(
    Microsoft.Azure.CloudConfigurationManager.GetSetting("StorageConnectionString"));
            CloudQueueClient queueClient = storageAccount.CreateCloudQueueClient();           
            CloudQueue queue = queueClient.GetQueueReference(Queue_Name);
            queue.FetchAttributes();
            var count=queue.ApproximateMessageCount;
            Console.WriteLine("message number in queue:"+count);
        }

The Result about queue count: