/// <summary>
/// 订阅主题
/// </summary>
/// <returns></returns>
public async Task Subscribe(string topic)
{
if (string.IsNullOrEmpty(topic))
{
UIAction.AppendLog("订阅主题不能为空！");
return;
}
if (!mqttClient.IsConnected)
{
UIAction.AppendLog("MQTT客户端尚未连接！");
return;
}
// Subscribe to a topic
await mqttClient.SubscribeAsync(new TopicFilterBuilder()
.WithTopic(topic)
.WithAtMostOnceQoS()
.Build()
);
UIAction.AppendLog($"已订阅[{topic}]主题");
}
/// <summary>
/// 读取缓存 调用
/// </summary>
/// <returns></returns>
public static object Read_CacheBin(string filename)
{
object obj = null;
string fullpath = CachePath + filename + ".bin";
try
{
if (FileHelper.IsExistFile(fullpath))
{
//对象二进制序列化
BinaryFormatter bf = new BinaryFormatter();
using (FileStream fsRead = new FileStream(fullpath, FileMode.Open))
{
obj = bf.Deserialize(fsRead);
}
}
return(obj);
}
catch (Exception ex)
{
UIAction.AppendLog("读取缓存异常：" + ex.Message);
return(obj);
}
}
public async Task ConnectMqttServerAsync()
{
// Create a new MQTT client.
BuldingLoginInfo();
if (mqttClient == null)
{
MqttFactory factory = new MqttFactory();
mqttClient = factory.CreateMqttClient();
mqttClient.ApplicationMessageReceived += MqttClient_ApplicationMessageReceived;
mqttClient.Connected += MqttClient_Connected;
mqttClient.Disconnected += MqttClient_Disconnected;
}
//非托管客户端
try
{
////Create TCP based options using the builder.
//var options1 = new MqttClientOptionsBuilder()
// .WithClientId("client001")
// .WithTcpServer("192.168.88.3")
// .WithCredentials("bud", "%spencer%")
// .WithTls()
// .WithCleanSession()
// .Build();
//// Use TCP connection.
//var options2 = new MqttClientOptionsBuilder()
// .WithTcpServer("192.168.88.3", 8222) // Port is optional
// .Build();
//// Use secure TCP connection.
//var options3 = new MqttClientOptionsBuilder()
// .WithTcpServer("192.168.88.3")
// .WithTls()
// .Build();
//Create TCP based options using the builder.
IMqttClientOptions options = new MqttClientOptionsBuilder()
.WithClientId(ClientId)
.WithTcpServer(TcpServer, TcpServerPort)
.WithCredentials(UserName, PassWord)
.WithKeepAlivePeriod(TimeSpan.FromSeconds(500))
//.WithTls()//服务器端没有启用加密协议，这里用tls的会提示协议异常
.WithCleanSession()
.Build();
//// For .NET Framwork & netstandard apps:
//MqttTcpChannel.CustomCertificateValidationCallback = (x509Certificate, x509Chain, sslPolicyErrors, mqttClientTcpOptions) =>
//{
// if (mqttClientTcpOptions.Server == "server_with_revoked_cert")
// {
// return true;
// }
// return false;
//};
//2.4.0版本的
//var options0 = new MqttClientTcpOptions
//{
// Server = "127.0.0.1",
// ClientId = Guid.NewGuid().ToString().Substring(0, 5),
// UserName = "******",
// Password = "******",
// CleanSession = true
//};
await mqttClient.ConnectAsync(options);
}
catch (Exception ex)
{
//isReconnect = false;
UIAction.AppendLog($"连接到MQTT服务器失败：" + ex.ToString());
}
//托管客户端
//try
//{
//// Setup and start a managed MQTT client.
//var options = new ManagedMqttClientOptionsBuilder()
// .WithAutoReconnectDelay(TimeSpan.FromSeconds(5))
// .WithClientOptions(new MqttClientOptionsBuilder()
// .WithClientId("Client_managed")
// .WithTcpServer("192.168.88.3", 8223)
// .WithTls()
// .Build())
// .Build();
//var mqttClient = new MqttFactory().CreateManagedMqttClient();
//await mqttClient.SubscribeAsync(new TopicFilterBuilder().WithTopic("my/topic").Build());
//await mqttClient.StartAsync(options);
//}
//catch (Exception)
//{
//}
}
/// <summary>
/// MQTT客户端连接成功
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void MqttClient_Connected(object sender, EventArgs e)
{
UIAction.AppendLog("已连接到MQTT服务器！");
}
