EasyNetQ 是一个容易使用，专门针对RabbitMQ的 .NET API。EasyNetQ是为了提供一个尽可能简洁的适用与RabbitMQ的.NET类库。

下面看下怎么集成。

1、nuget 安装

2、配置连接串

public static IBus CreateMessageBus(){// 消息服务器连接字符串var connectionString = ConfigurationManager.ConnectionStrings["RabbitMQConnString"];if (connectionString == null || connectionString.ConnectionString == string.Empty){throw new Exception("messageserver connection string is missing or empty");}return RabbitHutch.CreateBus(connectionString.ConnectionString);}

3、这边我们构建一个消息体

/// <summary>/// 消息类实体/// </summary>[Serializable]public class RabbitMQ_Message{public RabbitMQ_Message(){MessageID = DateTime.Now.Ticks.ToString();}/// <summary>/// 消息id/// </summary>public string MessageID { get; set; }/// <summary>/// 消息标题/// </summary>public string MessageTitle { get; set; }/// <summary>/// 消息内容/// </summary>public string MessageBody { get; set; }/// <summary>/// 消息管道/// </summary>public RabbitMessageRouterEnum MessageRouter { get; set; }/// <summary>/// 游客id/// </summary>public int customerId { get; set; }/// <summary>/// 标示代码 0:正确/// </summary>public ResponseStatus result { get; set; }/// <summary>/// 消息类型/// </summary>public SuperSocketMessageTypeEnum superSocketMessageType { get; set; }/// <summary>/// 消息过期时间（毫秒）/// </summary>public int expiredMillSeconds { get; set; }}

4、发送消息

/// <summary>/// 发送消息/// </summary>public static void Publish(RabbitMQ_Message msg){创建消息busIBus bus = null;try{创建消息busbus = BusBuilder.CreateMessageBus();bus.Publish(msg, x =>{x.WithTopic($"{msg.MessageRouter.ToDescription()}.{msg.customerId}");if (msg.expiredMillSeconds > 0){x.WithExpires(msg.expiredMillSeconds);}});//通过管道发送消息               LogExtention.getInstance().WriteCustomLogAsync(msg, "RabbitMQ消息发送", "MQHelperPublish");}catch (EasyNetQException ex){LogExtention.getInstance().ErrorAsync(ex, "RabbitMQ--MQHelper--Publish发布消息时出错");//处理连接消息服务器异常 }finally{if (bus != null){bus.Dispose();//与数据库connection类似，使用后记得销毁bus对象}               }}

4、接收消息

/// <summary>/// 接收消息/// </summary>/// <param name="msg"></param>public static ISubscriptionResult Subscribe(RabbitMQ_Message msg, IProcessMessage ipro){创建消息busIBus bus = null;try{bus = BusBuilder.CreateMessageBus();//subscriptionId设置不同的话，每一个subscriptionId都会收到相同的消息，下面的写法只会有一个接收者var subscriptionResult = bus.Subscribe<RabbitMQ_Message>(msg.MessageRouter.ToDescription(), message => ipro.ProcessMsg(message),x => x.WithQueueName(msg.customerId.ToString()).WithTopic($"{msg.MessageRouter.ToDescription()}.{msg.customerId}"));//subscriptionResult.Dispose();//取消订阅return subscriptionResult;}catch (EasyNetQException ex){LogExtention.getInstance().ErrorAsync(ex, "RabbitMQ--MQHelper--Subscribe订阅消息时出错");//处理连接消息服务器异常 }finally{if (bus != null){bus.Dispose();//与数据库connection类似，使用后记得销毁bus对象}}return null;}

在EasyNetQ中如果需要生产者确认功能，则需要在Rabbitmq的连接配置中设置publisherConfirms=true，这将会开启自动确认。在使用高级api定义交换机和队列时可以自己定义多种参数，比如消息是否持久化，消息最大长度等等。