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MqttClient 类

Mqtt协议的客户端实现,支持订阅消息,发布消息,详细的使用例子参考api文档
The client implementation of the Mqtt protocol supports subscription messages and publishing messages. For detailed usage examples, refer to the api documentation.
继承层次
SystemObject
  HslCommunication.Core.NetNetworkBase
    HslCommunication.Core.NetNetworkXBase
      HslCommunication.MQTTMqttClient

命名空间:  HslCommunication.MQTT
程序集:  HslCommunication (在 HslCommunication.dll 中) 版本:9.2.3.0 (9.2.3.0)
语法
public class MqttClient : NetworkXBase

MqttClient 类型公开以下成员。

构造函数
  名称说明
公共方法MqttClient
实例化一个默认的对象
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属性
  名称说明
公共属性代码示例LogNet
组件的日志工具,支持日志记录,只要实例化后,当前网络的基本信息,就以DEBUG等级进行输出
The component's logging tool supports logging. As long as the instantiation of the basic network information, the output will be output at DEBUG
(继承自 NetworkBase。)
公共属性代码示例Token
网络类的身份令牌,在hsl协议的模式下会有效,在和设备进行通信的时候是无效的
Network-type identity tokens will be valid in the hsl protocol mode and will not be valid when communicating with the device
(继承自 NetworkBase。)
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方法
  名称说明
受保护的方法CheckRemoteToken
检查当前的头子节信息的令牌是否是正确的,仅用于某些特殊的协议实现
Check whether the token of the current header subsection information is correct, only for some special protocol implementations
(继承自 NetworkBase。)
公共方法ConnectClose
关闭Mqtt服务器的连接。
Close the connection to the Mqtt server.
公共方法ConnectCloseAsync
关闭Mqtt服务器的连接。
Close the connection to the Mqtt server.
公共方法ConnectServer
连接服务器,如果连接失败,请稍候重试。
Connect to the server. If the connection fails, try again later.
公共方法ConnectServerAsync
连接服务器,如果连接失败,请稍候重试。
Connect to the server. If the connection fails, try again later.
受保护的方法代码示例CreateSocketAndConnect(IPEndPoint, Int32)
创建一个新的socket对象并连接到远程的地址,需要指定远程终结点,超时时间(单位是毫秒)
To create a new socket object and connect to a remote address, you need to specify the remote endpoint and the timeout period (in milliseconds)
(继承自 NetworkBase。)
受保护的方法代码示例CreateSocketAndConnect(String, Int32)
创建一个新的socket对象并连接到远程的地址,默认超时时间为10秒钟,需要指定ip地址以及端口号信息
Create a new socket object and connect to the remote address. The default timeout is 10 seconds. You need to specify the IP address and port number.
(继承自 NetworkBase。)
受保护的方法代码示例CreateSocketAndConnect(String, Int32, Int32)
创建一个新的socket对象并连接到远程的地址,需要指定ip地址以及端口号信息,还有超时时间,单位是毫秒
To create a new socket object and connect to a remote address, you need to specify the IP address and port number information, and the timeout period in milliseconds
(继承自 NetworkBase。)
受保护的方法代码示例CreateSocketAndConnectAsync(IPEndPoint, Int32)
创建一个新的socket对象并连接到远程的地址,需要指定远程终结点,超时时间(单位是毫秒)
To create a new socket object and connect to a remote address, you need to specify the remote endpoint and the timeout period (in milliseconds)
(继承自 NetworkBase。)
受保护的方法代码示例CreateSocketAndConnectAsync(String, Int32)
创建一个新的socket对象并连接到远程的地址,默认超时时间为10秒钟,需要指定ip地址以及端口号信息
Create a new socket object and connect to the remote address. The default timeout is 10 seconds. You need to specify the IP address and port number.
(继承自 NetworkBase。)
受保护的方法代码示例CreateSocketAndConnectAsync(String, Int32, Int32)
创建一个新的socket对象并连接到远程的地址,需要指定ip地址以及端口号信息,还有超时时间,单位是毫秒
To create a new socket object and connect to a remote address, you need to specify the IP address and port number information, and the timeout period in milliseconds
(继承自 NetworkBase。)
受保护的方法DeleteFileByName
删除文件的操作
Delete file operation
(继承自 NetworkXBase。)
公共方法Equals
Determines whether the specified object is equal to the current object.
(继承自 Object。)
受保护的方法Finalize
Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.
(继承自 Object。)
公共方法GetHashCode
Serves as the default hash function.
(继承自 Object。)
公共方法GetType
Gets the Type of the current instance.
(继承自 Object。)
受保护的方法MemberwiseClone
Creates a shallow copy of the current Object.
(继承自 Object。)
受保护的方法PreprocessFolderName
预处理文件夹的名称,除去文件夹名称最后一个'\'或'/',如果有的话
Preprocess the name of the folder, removing the last '\' or '/' in the folder name
(继承自 NetworkXBase。)
公共方法代码示例PublishMessage
发布一个MQTT协议的消息到服务器。该消息包含主题,负载数据,消息等级,是否保留信息。
Publish an MQTT protocol message to the server. The message contains the subject, payload data, message level, and whether to retain information.
公共方法代码示例PublishMessageAsync
发布一个MQTT协议的消息到服务器。该消息包含主题,负载数据,消息等级,是否保留信息。
Publish an MQTT protocol message to the server. The message contains the subject, payload data, message level, and whether to retain information.
受保护的方法ReadStream
读取流中的数据到缓存区,读取的长度需要按照实际的情况来判断
Read the data in the stream to the buffer area. The length of the read needs to be determined according to the actual situation.
(继承自 NetworkBase。)
受保护的方法ReadStreamAsync
读取流中的数据到缓存区,读取的长度需要按照实际的情况来判断
Read the data in the stream to the buffer area. The length of the read needs to be determined according to the actual situation.
(继承自 NetworkBase。)
受保护的方法Receive
接收固定长度的字节数组,允许指定超时时间,默认为60秒,当length大于0时,接收固定长度的数据内容,当length小于0时,接收不大于1024长度的随机数据信息
Receiving a fixed-length byte array, allowing a specified timeout time. The default is 60 seconds. When length is greater than 0, fixed-length data content is received. When length is less than 0, random data information of a length not greater than 1024 is received.
(继承自 NetworkBase。)
受保护的方法ReceiveAndCheckBytes
[自校验] 接收一条完整的同步数据,包含头子节和内容字节,基础的数据,如果结果异常,则结束通讯
[Self-checking] Receive a complete synchronization data, including header subsection and content bytes, basic data, if the result is abnormal, the communication ends
(继承自 NetworkBase。)
受保护的方法ReceiveAndCheckBytesAsync
[自校验] 接收一条完整的同步数据,包含头子节和内容字节,基础的数据,如果结果异常,则结束通讯
[Self-checking] Receive a complete synchronization data, including header subsection and content bytes, basic data, if the result is abnormal, the communication ends
(继承自 NetworkBase。)
受保护的方法ReceiveAsync
接收固定长度的字节数组,允许指定超时时间,默认为60秒,当length大于0时,接收固定长度的数据内容,当length小于0时,接收不大于1024长度的随机数据信息
Receiving a fixed-length byte array, allowing a specified timeout time. The default is 60 seconds. When length is greater than 0, fixed-length data content is received. When length is less than 0, random data information of a length not greater than 1024 is received.
(继承自 NetworkBase。)
受保护的方法ReceiveByMessage
接收一条完整的 数据内容,需要指定超时时间,单位为毫秒。
Receive a complete data content, Need to specify a timeout period in milliseconds
(继承自 NetworkBase。)
受保护的方法ReceiveByMessageAsync
接收一条完整的 数据内容,需要指定超时时间,单位为毫秒。
Receive a complete data content, Need to specify a timeout period in milliseconds
(继承自 NetworkBase。)
受保护的方法ReceiveBytesContentFromSocket
[自校验] 从网络中接收一串字节数据,如果结果异常,则结束通讯
[Self-checking] Receive a string of byte data from the network. If the result is abnormal, the communication ends.
(继承自 NetworkBase。)
受保护的方法ReceiveBytesContentFromSocketAsync
[自校验] 从网络中接收一串字节数据,如果结果异常,则结束通讯
[Self-checking] Receive a string of byte data from the network. If the result is abnormal, the communication ends.
(继承自 NetworkBase。)
受保护的方法ReceiveCommandLineFromSocket(Socket, Byte, Int32)
接收一行命令数据,需要自己指定这个结束符,默认超时时间为60秒,也即是60000,单位是毫秒
To receive a line of command data, you need to specify the terminator yourself. The default timeout is 60 seconds, which is 60,000, in milliseconds.
(继承自 NetworkBase。)
受保护的方法ReceiveCommandLineFromSocket(Socket, Byte, Byte, Int32)
接收一行命令数据,需要自己指定这个结束符,默认超时时间为60秒,也即是60000,单位是毫秒
To receive a line of command data, you need to specify the terminator yourself. The default timeout is 60 seconds, which is 60,000, in milliseconds.
(继承自 NetworkBase。)
受保护的方法ReceiveCommandLineFromSocketAsync(Socket, Byte, Int32)
接收一行命令数据,需要自己指定这个结束符,默认超时时间为60秒,也即是60000,单位是毫秒
To receive a line of command data, you need to specify the terminator yourself. The default timeout is 60 seconds, which is 60,000, in milliseconds.
(继承自 NetworkBase。)
受保护的方法ReceiveCommandLineFromSocketAsync(Socket, Byte, Byte, Int32)
接收一行命令数据,需要自己指定这个结束符,默认超时时间为60秒,也即是60000,单位是毫秒
To receive a line of command data, you need to specify the terminator yourself. The default timeout is 60 seconds, which is 60,000, in milliseconds.
(继承自 NetworkBase。)
受保护的方法ReceiveFileFromSocket(Socket, Stream, ActionInt64, Int64)
[自校验] 从网络中接收一个文件,写入数据流,如果结果异常,则结束通讯,参数顺序文件名,文件大小,文件标识,上传人
[Self-checking] Receive a file from the network. If the result is abnormal, the communication ends.
(继承自 NetworkXBase。)
受保护的方法ReceiveFileFromSocket(Socket, String, ActionInt64, Int64)
[自校验] 从网络中接收一个文件,如果结果异常,则结束通讯
[Self-checking] Receive a file from the network. If the result is abnormal, the communication ends.
(继承自 NetworkXBase。)
受保护的方法ReceiveFileFromSocketAsync(Socket, Stream, ActionInt64, Int64)
[自校验] 从网络中接收一个文件,写入数据流,如果结果异常,则结束通讯,参数顺序文件名,文件大小,文件标识,上传人
[Self-checking] Receive a file from the network. If the result is abnormal, the communication ends.
(继承自 NetworkXBase。)
受保护的方法ReceiveFileFromSocketAsync(Socket, String, ActionInt64, Int64)
[自校验] 从网络中接收一个文件,如果结果异常,则结束通讯
[Self-checking] Receive a file from the network. If the result is abnormal, the communication ends.
(继承自 NetworkXBase。)
受保护的方法ReceiveFileHeadFromSocket
[自校验] 从套接字中接收文件头信息
[Self-checking] Receive file header information from socket
(继承自 NetworkXBase。)
受保护的方法ReceiveFileHeadFromSocketAsync
[自校验] 从套接字中接收文件头信息
[Self-checking] Receive file header information from socket
(继承自 NetworkXBase。)
受保护的方法ReceiveFrameWebSocketPayload
从socket接收一条WebSocketMessage片段数据,返回WebSocketMessage的数据信息和是否最后一条数据内容
Receive a piece of WebSocketMessage fragment data from the socket, return the data information of WebSocketMessage and whether the last data content
(继承自 NetworkBase。)
受保护的方法ReceiveFrameWebSocketPayloadAsync
从socket接收一条WebSocketMessage片段数据,返回WebSocketMessage的数据信息和是否最后一条数据内容
Receive a piece of WebSocketMessage fragment data from the socket, return the data information of WebSocketMessage and whether the last data content
(继承自 NetworkBase。)
受保护的方法ReceiveHslMessage
接收一条hsl协议的数据信息,自动解析,解压,解码操作,获取最后的实际的数据,接收结果依次为暗号,用户码,负载数据
Receive a piece of hsl protocol data information, automatically parse, decompress, and decode operations to obtain the last actual data. The result is a opCode, user code, and payload data in order.
(继承自 NetworkXBase。)
受保护的方法ReceiveHslMessageAsync
接收一条hsl协议的数据信息,自动解析,解压,解码操作,获取最后的实际的数据,接收结果依次为暗号,用户码,负载数据
Receive a piece of hsl protocol data information, automatically parse, decompress, and decode operations to obtain the last actual data. The result is a opCode, user code, and payload data in order.
(继承自 NetworkXBase。)
受保护的方法ReceiveMqttMessage
接收一条完成的MQTT协议的报文信息,包含控制码和负载数据
Receive a message of a completed MQTT protocol, including control code and payload data
(继承自 NetworkBase。)
受保护的方法ReceiveMqttMessageAsync
接收一条完成的MQTT协议的报文信息,包含控制码和负载数据
Receive a message of a completed MQTT protocol, including control code and payload data
(继承自 NetworkBase。)
受保护的方法ReceiveRedisCommand
从网络接收一条完整的redis报文的消息
Receive a complete redis message from the network
(继承自 NetworkBase。)
受保护的方法ReceiveRedisCommandAsync
从网络接收一条完整的redis报文的消息
Receive a complete redis message from the network
(继承自 NetworkBase。)
受保护的方法ReceiveRedisCommandString
接收一行基于redis协议的字符串的信息,需要指定固定的长度
Receive a line of information based on the redis protocol string, you need to specify a fixed length
(继承自 NetworkBase。)
受保护的方法ReceiveRedisCommandStringAsync
接收一行基于redis协议的字符串的信息,需要指定固定的长度
Receive a line of information based on the redis protocol string, you need to specify a fixed length
(继承自 NetworkBase。)
受保护的方法ReceiveStringArrayContentFromSocket
[自校验] 从网络中接收一个字符串数组,如果结果异常,则结束通讯
[Self-check] Receive an array of strings from the network. If the result is abnormal, the communication ends.
(继承自 NetworkBase。)
受保护的方法ReceiveStringArrayContentFromSocketAsync
[自校验] 从网络中接收一个字符串数组,如果结果异常,则结束通讯
[Self-check] Receive an array of strings from the network. If the result is abnormal, the communication ends.
(继承自 NetworkBase。)
受保护的方法ReceiveStringContentFromSocket
[自校验] 从网络中接收一个字符串数据,如果结果异常,则结束通讯
[Self-checking] Receive a string of data from the network. If the result is abnormal, the communication ends.
(继承自 NetworkBase。)
受保护的方法ReceiveStringContentFromSocketAsync
[自校验] 从网络中接收一个字符串数据,如果结果异常,则结束通讯
[Self-checking] Receive a string of data from the network. If the result is abnormal, the communication ends.
(继承自 NetworkBase。)
受保护的方法ReceiveWebSocketPayload
从socket接收一条完整的websocket数据,返回WebSocketMessage的数据信息
Receive a complete websocket data from the socket, return the data information of the WebSocketMessage
(继承自 NetworkBase。)
受保护的方法ReceiveWebSocketPayloadAsync
从socket接收一条完整的websocket数据,返回WebSocketMessage的数据信息
Receive a complete websocket data from the socket, return the data information of the WebSocketMessage
(继承自 NetworkBase。)
受保护的方法Send(Socket, Byte)
发送消息给套接字,直到完成的时候返回,经过测试,本方法是线程安全的。
Send a message to the socket until it returns when completed. After testing, this method is thread-safe.
(继承自 NetworkBase。)
受保护的方法Send(Socket, Byte, Int32, Int32)
发送消息给套接字,直到完成的时候返回,经过测试,本方法是线程安全的。
Send a message to the socket until it returns when completed. After testing, this method is thread-safe.
(继承自 NetworkBase。)
受保护的方法SendAccountAndCheckReceive
[自校验] 直接发送字符串数组并确认对方接收完成数据,如果结果异常,则结束通讯
[Self-check] Send string array directly and confirm that the other party has received the completed data. If the result is abnormal, the communication ends.
(继承自 NetworkBase。)
受保护的方法SendAccountAndCheckReceiveAsync
[自校验] 直接发送字符串数组并确认对方接收完成数据,如果结果异常,则结束通讯
[Self-check] Send string array directly and confirm that the other party has received the completed data. If the result is abnormal, the communication ends.
(继承自 NetworkBase。)
受保护的方法SendAsync(Socket, Byte)
发送消息给套接字,直到完成的时候返回,经过测试,本方法是线程安全的。
Send a message to the socket until it returns when completed. After testing, this method is thread-safe.
(继承自 NetworkBase。)
受保护的方法SendAsync(Socket, Byte, Int32, Int32)
发送消息给套接字,直到完成的时候返回,经过测试,本方法是线程安全的。
Send a message to the socket until it returns when completed. After testing, this method is thread-safe.
(继承自 NetworkBase。)
受保护的方法SendBaseAndCheckReceive
[自校验] 发送字节数据并确认对方接收完成数据,如果结果异常,则结束通讯
[Self-check] Send the byte data and confirm that the other party has received the completed data. If the result is abnormal, the communication ends.
(继承自 NetworkBase。)
受保护的方法SendBaseAndCheckReceiveAsync
[自校验] 发送字节数据并确认对方接收完成数据,如果结果异常,则结束通讯
[Self-check] Send the byte data and confirm that the other party has received the completed data. If the result is abnormal, the communication ends.
(继承自 NetworkBase。)
受保护的方法SendBytesAndCheckReceive
[自校验] 发送字节数据并确认对方接收完成数据,如果结果异常,则结束通讯
[Self-check] Send the byte data and confirm that the other party has received the completed data. If the result is abnormal, the communication ends.
(继承自 NetworkBase。)
受保护的方法SendBytesAndCheckReceiveAsync
[自校验] 发送字节数据并确认对方接收完成数据,如果结果异常,则结束通讯
[Self-check] Send the byte data and confirm that the other party has received the completed data. If the result is abnormal, the communication ends.
(继承自 NetworkBase。)
受保护的方法SendFileAndCheckReceive(Socket, Stream, String, String, String, ActionInt64, Int64)
[自校验] 将流数据发送至套接字,具体发送细节将在继承类中实现,如果结果异常,则结束通讯
[Self-checking] Send stream data to the socket. The specific sending details will be implemented in the inherited class. If the result is abnormal, the communication will be terminated
(继承自 NetworkXBase。)
受保护的方法SendFileAndCheckReceive(Socket, String, String, String, String, ActionInt64, Int64)
[自校验] 将文件数据发送至套接字,具体发送细节将在继承类中实现,如果结果异常,则结束通讯
[Self-checking] Send the file data to the socket. The specific sending details will be implemented in the inherited class. If the result is abnormal, the communication will end
(继承自 NetworkXBase。)
受保护的方法SendFileAndCheckReceiveAsync(Socket, Stream, String, String, String, ActionInt64, Int64)
[自校验] 将流数据发送至套接字,具体发送细节将在继承类中实现,如果结果异常,则结束通讯
[Self-checking] Send stream data to the socket. The specific sending details will be implemented in the inherited class. If the result is abnormal, the communication will be terminated
(继承自 NetworkXBase。)
受保护的方法SendFileAndCheckReceiveAsync(Socket, String, String, String, String, ActionInt64, Int64)
[自校验] 将文件数据发送至套接字,具体发送细节将在继承类中实现,如果结果异常,则结束通讯
[Self-checking] Send the file data to the socket. The specific sending details will be implemented in the inherited class. If the result is abnormal, the communication will end
(继承自 NetworkXBase。)
受保护的方法SendFileStreamToSocket
[自校验] 将文件数据发送至套接字,如果结果异常,则结束通讯
[Self-check] Send the file data to the socket. If the result is abnormal, the communication is ended.
(继承自 NetworkXBase。)
受保护的方法SendFileStreamToSocketAsync
[自校验] 将文件数据发送至套接字,如果结果异常,则结束通讯
[Self-check] Send the file data to the socket. If the result is abnormal, the communication is ended.
(继承自 NetworkXBase。)
受保护的方法SendStreamToSocket
发送一个流的所有数据到指定的网络套接字,需要指定发送的数据长度,支持按照百分比的进度报告
Send all the data of a stream to the specified network socket. You need to specify the length of the data to be sent. It supports the progress report in percentage.
(继承自 NetworkBase。)
受保护的方法SendStreamToSocketAsync
发送一个流的所有数据到指定的网络套接字,需要指定发送的数据长度,支持按照百分比的进度报告
Send all the data of a stream to the specified network socket. You need to specify the length of the data to be sent. It supports the progress report in percentage.
(继承自 NetworkBase。)
受保护的方法SendStringAndCheckReceive(Socket, Int32, String)
[自校验] 直接发送字符串数据并确认对方接收完成数据,如果结果异常,则结束通讯
[Self-checking] Send string data directly and confirm that the other party has received the completed data. If the result is abnormal, the communication ends.
(继承自 NetworkBase。)
受保护的方法SendStringAndCheckReceive(Socket, Int32, String)
[自校验] 直接发送字符串数组并确认对方接收完成数据,如果结果异常,则结束通讯
[Self-check] Send string array directly and confirm that the other party has received the completed data. If the result is abnormal, the communication ends.
(继承自 NetworkBase。)
受保护的方法SendStringAndCheckReceiveAsync(Socket, Int32, String)
[自校验] 直接发送字符串数据并确认对方接收完成数据,如果结果异常,则结束通讯
[Self-checking] Send string data directly and confirm that the other party has received the completed data. If the result is abnormal, the communication ends.
(继承自 NetworkBase。)
受保护的方法SendStringAndCheckReceiveAsync(Socket, Int32, String)
[自校验] 直接发送字符串数组并确认对方接收完成数据,如果结果异常,则结束通讯
[Self-check] Send string array directly and confirm that the other party has received the completed data. If the result is abnormal, the communication ends.
(继承自 NetworkBase。)
公共方法代码示例SubscribeMessage(String)
从服务器订阅一个或多个主题信息
Subscribe to one or more topics from the server
公共方法代码示例SubscribeMessage(String)
从服务器订阅一个或多个主题信息
Subscribe to one or more topics from the server
公共方法代码示例SubscribeMessageAsync(String)
从服务器订阅一个或多个主题信息
Subscribe to one or more topics from the server
公共方法代码示例SubscribeMessageAsync(String)
从服务器订阅一个或多个主题信息
Subscribe to one or more topics from the server
受保护的方法ThreadPoolSocketCheckTimeOut
检查网络套接字是否操作超时,传入的参数需要是HslTimeOut类型,封装socket操作。
Check if the operation of the network socket has timed out. The parameters passed in need to be of type HslTimeOut to encapsulate the socket operation.
(继承自 NetworkBase。)
公共方法ToString
Returns a string that represents the current object.
(重写 NetworkXBaseToString.)
公共方法代码示例UnSubscribeMessage(String)
取消订阅置顶的主题信息
公共方法代码示例UnSubscribeMessage(String)
取消订阅多个主题信息,取消之后,当前的订阅数据就不在接收到,除非服务器强制推送。
Unsubscribe from multiple topic information. After cancellation, the current subscription data will not be received unless the server forces it to push it.
公共方法代码示例UnSubscribeMessageAsync(String)
取消订阅置顶的主题信息
公共方法代码示例UnSubscribeMessageAsync(String)
取消订阅多个主题信息,取消之后,当前的订阅数据就不在接收到,除非服务器强制推送。
Unsubscribe from multiple topic information. After cancellation, the current subscription data will not be received unless the server forces it to push it.
受保护的方法WriteStream
将缓冲区的数据写入到流里面去
Write the buffer data to the stream
(继承自 NetworkBase。)
受保护的方法WriteStreamAsync
将缓冲区的数据写入到流里面去
Write the buffer data to the stream
(继承自 NetworkBase。)
受保护的方法WriteStreamFromSocket
从套接字中接收所有的数据然后写入到指定的流当中去,需要指定数据的长度,支持按照百分比进行进度报告
Receives all data from the socket and writes it to the specified stream. The length of the data needs to be specified, and progress reporting is supported in percentage.
(继承自 NetworkBase。)
受保护的方法WriteStreamFromSocketAsync
从套接字中接收所有的数据然后写入到指定的流当中去,需要指定数据的长度,支持按照百分比进行进度报告
Receives all data from the socket and writes it to the specified stream. The length of the data needs to be specified, and progress reporting is supported in percentage.
(继承自 NetworkBase。)
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事件
  名称说明
公共事件OnMqttMessageReceived
当接收到Mqtt订阅的信息的时候触发
公共事件OnNetworkError
当网络发生异常的时候触发的事件,用户应该在事件里进行重连服务器
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字段
  名称说明
受保护的字段CoreSocket
对客户端而言是的通讯用的套接字,对服务器来说是用于侦听的套接字
A communication socket for the client, or a listening socket for the server
(继承自 NetworkBase。)
受保护的字段fileCacheSize
文件传输的时候的缓存大小,直接影响传输的速度,值越大,传输速度越快,越占内存,默认为100K大小
The size of the cache during file transfer directly affects the speed of the transfer. The larger the value, the faster the transfer speed and the more memory it takes. The default size is 100K.
(继承自 NetworkBase。)
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扩展方法
  名称说明
公共扩展器方法ToJsonString
获取当前对象的JSON格式表示的字符串。
Gets the string represented by the JSON format of the current object.
(由 HslExtension 定义。)
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备注
这是一个MQTT的客户端实现,参照MQTT协议的3.1.1版本设计实现的。服务器可以是其他的组件提供的,其他的可以参考示例
This is an MQTT client implementation, designed and implemented with reference to version 3.1.1 of the MQTT protocol. The server can be provided by other components.
示例
简单的实例化
// 简单的实例化例子
MqttClient mqttClient = new MqttClient( new MqttConnectionOptions( )
{
    ClientId = "ABC",                     // 客户端的唯一的ID信息
    IpAddress = "127.0.0.1",              // 服务器的地址
} );
带用户名密码的实例化
// 如果有密码的情况
MqttClient mqttClient = new MqttClient( new MqttConnectionOptions( )
{
    ClientId = "ABC",                                            // 客户端的唯一的ID信息
    IpAddress = "127.0.0.1",                                     // 服务器的地址
    Credentials = new MqttCredential( "admin", "123456" )        // 设置了用户名和密码
} );
连接示例
// 连接服务器
HslCommunication.OperateResult connect =  mqttClient.ConnectServer( );
if (connect.IsSuccess)
{
    // 连接成功
}
else
{
    // 连接失败,过会就需要重新连接了
}

// 重点说明。如果过会网络不行了,断开了,内部会自动连接服务器的,你只管publish就可以了
发布示例
// 发布示例
HslCommunication.OperateResult connect = mqttClient.PublishMessage( new MqttApplicationMessage( )
{
    Topic = "A",                                                           // 主题
    QualityOfServiceLevel = MqttQualityOfServiceLevel.AtMostOnce,          // 如果是实时数据,适合用这个
    Payload = Encoding.UTF8.GetBytes("Test data")                          // 发布的数据
} );
if (connect.IsSuccess)
{
    // 发布成功
}
else
{
    // 发布失败
}

// 重点说明。如果过会网络不行了,断开了,内部会自动连接服务器的,你只管publish就可以了
订阅示例
// 订阅示例
mqttClient.OnMqttMessageReceived += ( string topic, byte[] payload ) =>
{
    Console.WriteLine( "Time:" + DateTime.Now.ToString( ) );
    Console.WriteLine( "Topic:" + topic );
    Console.WriteLine( "Payload:" + Encoding.UTF8.GetString( payload ) );
};

// 然后添加订阅
HslCommunication.OperateResult sub = mqttClient.SubscribeMessage( "A" );
if (sub.IsSuccess)
{
    // 订阅成功
}
else
{
    // 订阅失败
}
网络重连示例
// 网络失败的情况,需要自己来手动控制重连,实例化后进行事件绑定
mqttClient.OnNetworkError += ( object sender, EventArgs e ) =>
{
    // 当网络异常的时候触发,可以在此处重连服务器
    if (sender is MqttClient client)
    {
        // 开始重连服务器,直到连接成功为止
        client.LogNet?.WriteInfo( "网络异常,准备10秒后重新连接。" );
        while (true)
        {
            // 每隔10秒重连
            System.Threading.Thread.Sleep( 10_000 );
            client.LogNet?.WriteInfo( "准备重新连接服务器..." );
            HslCommunication.OperateResult connect = client.ConnectServer( );
            if (connect.IsSuccess)
            {
                // 连接成功后,可以在下方break之前进行订阅,或是数据初始化操作
                client.LogNet?.WriteInfo( "连接服务器成功!" );
                break;
            }
            client.LogNet?.WriteInfo( "连接失败,准备10秒后重新连接。" );
        }
    }
};
参见