public static void Publish(string topic, string inputString)
{
if (string.IsNullOrEmpty(topic))
{
Console.WriteLine("发布主题不能为空！\n");
return;
}
var appMsg = new MqttApplicationMessage(topic, Encoding.UTF8.GetBytes(inputString), MqttQualityOfServiceLevel.AtMostOnce, false);
mqttClient.PublishAsync(appMsg);
}
private void BtnPublish_Click(object sender, RoutedEventArgs e)
{
string topic = txtPubTopic.Text.Trim();
if (string.IsNullOrEmpty(topic))
{
MessageBox.Show("发布主题不能为空！");
return;
}
string inputString = txtSendMessage.Text.Trim();
var appMsg = new MqttApplicationMessage(topic, Encoding.UTF8.GetBytes(inputString), MqttQualityOfServiceLevel.AtMostOnce, false);
mqttClient.PublishAsync(appMsg);
}
/// <summary>
/// 发布
/// <paramref name="QoS"/>
/// <para>0 - 最多一次</para>
/// <para>1 - 至少一次</para>
/// <para>2 - 仅一次</para>
/// </summary>
/// <param name="Topic">发布主题</param>
/// <param name="Message">发布内容</param>
/// <returns></returns>
public static void Publish(string Topic, string Message)
{
try
{
if (mqttClient == null)
{
return;
}
if (mqttClient.IsConnected == false)
{
mqttClient.ConnectAsync(options);
}
if (mqttClient.IsConnected == false)
{
Console.WriteLine("Publish >>Connected Failed! ");
return;
}
Console.WriteLine("Publish >>Topic: " + Topic + "; QoS: " + QualityOfServiceLevel + "; Retained: " + Retained + ";");
Console.WriteLine("Publish >>Message: " + Message);
MqttApplicationMessageBuilder mamb = new MqttApplicationMessageBuilder()
.WithTopic(Topic)
.WithPayload(Message).WithRetainFlag(Retained);
if (QualityOfServiceLevel == 0)
{
mamb = mamb.WithAtMostOnceQoS();
}
else if (QualityOfServiceLevel == 1)
{
mamb = mamb.WithAtLeastOnceQoS();
}
else if (QualityOfServiceLevel == 2)
{
mamb = mamb.WithExactlyOnceQoS();
}
mqttClient.PublishAsync(mamb.Build());
}
catch (Exception exp)
{
Console.WriteLine("Publish >>" + exp.Message);
}
}
