Azure Function Bindings for Service Bus - azure

Question

I'm following this documentation to create a trigger for a service bus queue.
I'd like to be able to access the message properties. I thought I could simply add Dictionary<string, object> properties to the parameter list like so:
public static void Run(
[ServiceBusTrigger(QueueName, Connection = "connectionSetting")]
// Message message,
string myQueueItem,
Int32 deliveryCount,
DateTime enqueuedTimeUtc,
string messageId,
string ContentType,
Dictionary<string,object> properties,
TraceWriter log)
But that throws:
Error indexing method 'Program.Run'. Microsoft.Azure.WebJobs.Host:
Cannot bind parameter 'properties' to type Dictionary`2. Make sure the
parameter Type is supported by the binding.
Here is a list of the possible parameter bindings. What am I getting wrong?
Update:
I tried changing the singature to
public static void Run(
[ServiceBusTrigger(QueueName, Connection = "connectionSetting")]
// Message message,
string myQueueItem,
Int32 deliveryCount,
DateTime enqueuedTimeUtc,
string messageId,
string ContentType,
IDictionary<string, object> properties,
TraceWriter log)
It produces the same error:
Error indexing method 'Program.Run'. Microsoft.Azure.WebJobs.Host:
Cannot bind parameter 'properties' to type IDictionary

Answer 1

For function v2 runtime, the name of the parameter has changed to UserProperties
To fix the error, update the parameter to the following:
IDictionary<string, object> UserProperties
Here is the related code from Service Bus extension.
https://github.com/Azure/azure-webjobs-sdk/blob/42a711763ddecca9df4caae9c7dc5fe16178880c/src/Microsoft.Azure.WebJobs.ServiceBus/Triggers/ServiceBusTriggerBinding.cs#L127

Answer 2

IDictionary<string, object> properties
Update:
for version 2 use the following bindings:
public static void Run(
[ServiceBusTrigger(QueueName, Connection = "connectionSetting")]
Message message,
string label,
Int32 deliveryCount,
DateTime enqueuedTimeUtc,
string messageId,
string ContentType,
ILogger log)
{
log.LogInformation($"C# ServiceBus queue trigger function processed message: {Encoding.UTF8.GetString(message.Body)}");
var userProperties = message.UserProperties;
}