MqttNet Basic example-CodePudding

The

So taking as example the solution above

I have created a project of my own with the same referencies

Per each project I have also added the correct using statements as in the example.

So everything should be correct but when I paste the code for the Server I get those errors

MqttServerOptionsBuilder options = new MqttServerOptionsBuilder() .WithDefaultEndpoint() .WithDefaultEndpointPort(707) .WithConnectionValidator(OnNewConnection) .WithApplicationMessageInterceptor(OnNewMessage); IMqttServer mqttServer = new MqttFactory().CreateMqttServer();

and also for the client I get other errors

Where is the problem? Thanks

---ADD---

As requested here are the errors

(1) Error CS1061 'IManagedMqttClient' does not contain a definition for 'ConnectedHandler' and no accessible extension method 'ConnectedHandler' accepting a first argument of type 'IManagedMqttClient' could be found (are you missing a using directive or an assembly reference?) Client C:\Development\MqttDemo\MqttDemo\Client\MainWindow.xaml.cs 43 25 IntelliSense Active (2) Error CS0246 The type or namespace name 'MqttClientConnectedHandlerDelegate' could not be found (are you missing a using directive or an assembly reference?) Client C:\Development\MqttDemo\MqttDemo\Client\MainWindow.xaml.cs 43 48 IntelliSense Active (3) Error CS0103 The name 'OnConnected' does not exist in the current context Client C:\Development\MqttDemo\MqttDemo\Client\MainWindow.xaml.cs 43 83 IntelliSense Active (4) Error CS1061 'IManagedMqttClient' does not contain a definition for 'DisconnectedHandler' and no accessible extension method 'DisconnectedHandler' accepting a first argument of type 'IManagedMqttClient' could be found (are you missing a using directive or an assembly reference?) Client C:\Development\MqttDemo\MqttDemo\Client\MainWindow.xaml.cs 44 25 IntelliSense Active (5) Error CS0246 The type or namespace name 'MqttClientDisconnectedHandlerDelegate' could not be found (are you missing a using directive or an assembly reference?) Client C:\Development\MqttDemo\MqttDemo\Client\MainWindow.xaml.cs 44 51 IntelliSense Active (6) Error CS0103 The name 'OnDisconnected' does not exist in the current context Client C:\Development\MqttDemo\MqttDemo\Client\MainWindow.xaml.cs 44 89 IntelliSense Active (7) Error CS1061 'IManagedMqttClient' does not contain a definition for 'ConnectingFailedHandler' and no accessible extension method 'ConnectingFailedHandler' accepting a first argument of type 'IManagedMqttClient' could be found (are you missing a using directive or an assembly reference?) Client C:\Development\MqttDemo\MqttDemo\Client\MainWindow.xaml.cs 45 25 IntelliSense Active (8) Error CS0246 The type or namespace name 'ConnectingFailedHandlerDelegate' could not be found (are you missing a using directive or an assembly reference?) Client C:\Development\MqttDemo\MqttDemo\Client\MainWindow.xaml.cs 45 55 IntelliSense Active (9) Error CS0103 The name 'OnConnectingFailed' does not exist in the current context Client C:\Development\MqttDemo\MqttDemo\Client\MainWindow.xaml.cs 45 87 IntelliSense Active (10) Error CS1061 'IManagedMqttClient' does not contain a definition for 'ApplicationMessageReceivedHandler' and no accessible extension method 'ApplicationMessageReceivedHandler' accepting a first argument of type 'IManagedMqttClient' could be found (are you missing a using directive or an assembly reference?) Client C:\Development\MqttDemo\MqttDemo\Client\MainWindow.xaml.cs 47 25 IntelliSense Active (11) Error CS0246 The type or namespace name 'MqttApplicationMessageReceivedHandlerDelegate' could not be found (are you missing a using directive or an assembly reference?) Client C:\Development\MqttDemo\MqttDemo\Client\MainWindow.xaml.cs 47 65 IntelliSense Active (12) Error CS1061 'IManagedMqttClient' does not contain a definition for 'PublishAsync' and no accessible extension method 'PublishAsync' accepting a first argument of type 'IManagedMqttClient' could be found (are you missing a using directive or an assembly reference?) Client C:\Development\MqttDemo\MqttDemo\Client\MainWindow.xaml.cs 56 29 IntelliSense Active

CodePudding user response：

MQTT is fast becoming one of the main protocols for IOT (internet of things) deployments.

There are two different variants of MQTT and several versions.
MQTT v3.1.0 –
MQTT v3.1.1 – In Common Use
MQTT v5 – Currently Limited use
MQTT-SN – See notes later

The example you follow use version 3.0.16. MQTT v3.1.1 is version in common use.There is very little difference between v3.10 and 3.1.1. so downgread your MQTT to solve this problem.

Install-Package MQTTnet -Version 3.0.16

Client:

Install-Package MQTTnet.Extensions.ManagedClient -Version 3.0.16

ref: link1, link2, link3, link4