如果发生异常，有没有办法使用 C# 将消息发送到死信主题？

Question

我有 azure 函数应用程序，它根据进入服务总线主题的新消息触发。 maxdeliverycount=10

但是，如果发生任何异常，我想将消息发送到死信主题中，该怎么做？

 [FunctionName("ProcessData")]
        public static void Run([ServiceBusTrigger("topic", "sub1", Connection = "ConnectionStringSettingName")]string mySbMsg, TraceWriter log)
        {           
            try
            {
                //process message mySbMsg
                DataSchema data = JsonConvert.DeserializeObject<DataSchema>(mySbMsg);
                ...
            }
            catch(Exception ex)
            {
              // How to send message into Dead letter explicitly ?
            }
        }

Answer 1

以下代码片段显示了 MessageReceiver 用法的示例：

using Microsoft.Azure.ServiceBus.Core;
using Microsoft.Azure.WebJobs;
using Microsoft.Extensions.Logging;
using System;
using System.Threading.Tasks;

public static class Function8
{
    [FunctionName("Function8")]
    public static async Task Run([ServiceBusTrigger("topic2", "test2", Connection = "AzureServiceBusConnectionString")]
        string mySbMsg, string lockToken, MessageReceiver messageReceiver, ILogger log)
    {
        log.LogInformation($"C# ServiceBus topic trigger function processed message: {mySbMsg}");

        try
        {
            throw new Exception();
            // await messageReceiver.CompleteAsync(lockToken);
        }
        catch (Exception ex)
        {
            await messageReceiver.DeadLetterAsync(lockToken);
        }
    }
}

如果发生异常，有没有办法使用 C# 将消息发送到死信主题？

If exception occurs is there any way to send message into dead letter topic using c#?

c#

azure-functions

azureservicebus

azure-servicebus-topics