我想在.Net Core上使用Azure Service Bus,只读一条消息。似乎Microsoft.Azure.ServiceBus
不支持这种情况。到目前为止测试代码有点让我这么做:
public void ReceiveOne()
{
var queueClient = new QueueClient(ServiceBusConnectionString, "go_testing");
queueClient.RegisterMessageHandler(
async (message, token) =>
{
var messageBody = Encoding.UTF8.GetString(message.Body);
Console.WriteLine($"Received: {messageBody}, time: {DateTime.Now}");
await queueClient.CompleteAsync(message.SystemProperties.LockToken);
await queueClient.CloseAsync();
},
new MessageHandlerOptions(async args => Console.WriteLine(args.Exception))
{ MaxConcurrentCalls = 1, AutoComplete = false });
}
所以我在成功阅读一条消息后关闭队列。它有效,但它也会触发异常。
你知道更好的方法吗?
答案 0 :(得分:1)
我找到了解决方法:
IMessageReceiver messageReceiver = new MessageReceiver(ServiceBusConnectionString, QueueName, ReceiveMode.PeekLock);
// Receive the message
Message message = await messageReceiver.ReceiveAsync();
// Process the message
Console.WriteLine($"Received message: SequenceNumber:{message.SystemProperties.SequenceNumber} Body:{Encoding.UTF8.GetString(message.Body)}");
// Complete the message so that it is not received again.
// This can be done only if the MessageReceiver is created in ReceiveMode.PeekLock mode (which is default).
await messageReceiver.CompleteAsync(message.SystemProperties.LockToken);
await messageReceiver.CloseAsync();
您需要包括:
using Microsoft.Azure.ServiceBus;
using Microsoft.Azure.ServiceBus.Core;
答案 1 :(得分:0)
RegisterMessageHandler是一个便捷API,用于接收队列中显示的所有消息。
您需要较低级别的API queueClient.ReceiveAsync
ReceiveAsync()
异步收到消息
请参阅此示例Receive Loop,了解如何使用ReceiveAsync API接收多条消息。