Azure ServiceBus Queue - Serialization operation failed due to unsupported type System.Byte[]

Question

Hi,

I'm trying to send custom message to Azure ServiceBuz Queue. The custom message has a property which accepts Byte[]. While sending the message to queue using I'm getting "Serialization operation failed due to unsupported type System.Byte[]" error.

Below code is throwing the error:

     var serviceMessage = new ServiceBusMessage(Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(replyMessage)))  
                    {  
      
                        MessageId = replyMessage.OriginatorMessageId,  
                        ApplicationProperties =  
                    {  
                        { "ByteArrayResponseContent", replyMessage.ByteArrayContent }  
      
                    }  
                    };  
                    await sender.SendMessageAsync(serviceMessage);  
  
  

If I do not use "await" for "SendMessageAsync" then it doesn't throw any error, but the message does not get delivered to the Queue.

var serviceMessage = new ServiceBusMessage(Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(replyMessage)))  
                 {  
      
                     MessageId = replyMessage.OriginatorMessageId,  
                     ApplicationProperties =  
                 {  
                     { "ByteArrayResponseContent", replyMessage.ByteArrayContent }  
      
                 }  
                 };  
                 sender.SendMessageAsync(serviceMessage);  

Please suggest me how to resolve this error?

Thanks in advance!

Answer 1

the default serialization is to json and byte arrays are not supported. you can pass an byte stream instead, but the receiver must have a custom de-serializer as GetBody<T> will not work.

you could define a new message, and pass the byte array as a base64 or hex string

Answer 2

Hi @Bruce (SqlWork.com) , Thanks for your support.

I was able to resolve the problem by following steps

1. Change the ServiceBus plan from "Standard" to "Premium"
2. I was trying to put large message body(6MB) into the Message Custom property section.

                   var serviceMessage = new ServiceBusMessage(convertMsgBodyToBase64String)  
                       {  
   
                           MessageId = replyMessage.OriginatorMessageId  
                       };  
                       sender.SendMessageAsync(serviceMessage);  
   

Removing the message body data from message custom property resolved the issue and I could see my messages in ServiceBus Queue.

Many Thanks!