store in blob storage from queue trigger

Question

This question is edited as I did not have a good idea about how binding works in azure functions and the my question was poorly formed.

basically, I wanted to know how to write store a blob to a blog storage which has to be triggered by a queue msg (meaning the blob should be created in an azure queue trigger and then stored to a blob storage).

Tom Sun has given the answer which I was expecting

Answer 1

If you want to store the queue messages to an azure blob via queue trigger, you could use the cloudAppendblob. The following the demo code

[FunctionName("TestQueueTrigger")]
public static void Run([QueueTrigger("queueName", Connection = "AzureWebJobsStorage")]string myQueueItem,TraceWriter log)
{

   log.Info($"C# Queue trigger function processed: {myQueueItem}");
   CloudStorageAccount storageAccount = CloudStorageAccount.Parse(CloudConfigurationManager.GetSetting("AzureWebJobsStorage"));
   CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
   CloudBlobContainer container = blobClient.GetContainerReference("mycontainer");

// Create the container if it doesn't already exist.
   container.CreateIfNotExists();

   var appendBlob = container.GetAppendBlobReference("blobName.txt");

   if (!appendBlob.Exists())
   {
        appendBlob.CreateOrReplace();
        appendBlob.AppendText(myQueueItem);
   }
   else
   {
      appendBlob.AppendText($",{myQueueItem}");
   }


 }