mqtt向android推送消息（一）——发送端使用.net

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使用.net进行mqtt协议通讯，主要是为了开发居于mqtt协议向android推送消息，使用.net开发可以参考mqtt.org上面的库，我用的是M2MQTT，网上资料很少，具体例子如下：
一、消息发布：

if (this.sender == null)
            {
                this.sender = new MqttClient(IPAddress.Parse(host), 1883);
                //var mqttClient = new MqttClient("localhost");
                this.sender.Connect("sender");
            }
            this.sender.Publish("mobileGKTopic", System.Text.Encoding.Default.GetBytes(textBox2.Text));

 二、消息接收

 mqttClient = new MqttClient(IPAddress.Parse(host), 1883);
            //mqttClient = new MqttClient("localhost");
            mqttClient.Connect("Receiver");
            mqttClient.MqttMsgPublishReceived += new MqttClient.MqttMsgPublishEventHandler(mqttClient_MqttMsgPublishReceived);

            

            mqttClient.Subscribe(new string[] { "testTopic" }, new byte[] { MqttMsgBase.QOS_LEVEL_AT_LEAST_ONCE });

private void mqttClient_MqttMsgPublishReceived(object sender, uPLibrary.Networking.M2Mqtt.Messages.MqttMsgPublishEventArgs e)
        {
            //throw new NotImplementedException();
            var msg = System.Text.Encoding.Default.GetString(e.Message);
            if (!String.IsNullOrEmpty(msg))
            {
                textBox1.AppendText(Environment.NewLine);
                textBox1.AppendText(msg);
            }
        }

 需要注意的是，编译mqtt库时要把条件编译SSL关闭，SSL的编译我还没有高清。

 

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