如何使用MQTTnet C#发布和订阅文件

Question

我正在通过MQTTnet通过C#向另一个客户端发送文件而不是字符串。

我想发送包含分隔数据的文件。

下面是该文件的一个示例：

Time Stamp  Time Zone   Fuel Category           Gen MW
05/09/2018  00:05:00    EDT  Dual Fuel          1400
05/09/2018  00:05:00    EDT  Natural Gas        2144
05/09/2018  00:05:00    EDT  Nuclear            4114
05/09/2018  00:05:00    EDT  Other Fossil Fuels 4
05/09/2018  00:05:00    EDT  Other Renewables   226
05/09/2018  00:05:00    EDT  Wind               41
05/09/2018  00:05:00    EDT  Hydro              3229
05/09/2018  00:10:00    EDT  Dual Fuel          1307
05/09/2018  00:10:00    EDT  Natural Gas        2092
05/09/2018  00:10:00    EDT  Nuclear            4115

有人能给我们举几个简单的例子来说明如何做到这一点吗？

Answer 1

只需将文件读取为字节数组并将其传递到有效负载中即可。

 byte[] payload = File.ReadAllBytes("your file path");
 messageBuilder = new MqttApplicationMessageBuilder()
                                .WithAtLeastOnceQoS()
                                .WithPayload(payload)
                                .WithTopic(topic)
                                .WithRetainFlag()
                                .Build();