C sharp serial port event handler

This behavior does not apply to other values in the SerialPinChange enumeration. PinChanged , DataReceived , and ErrorReceived events may be called out of order, and there may be a slight delay between when the underlying stream reports the error and when the event handler is executed.

Only one event handler can execute at a time. The PinChanged event is raised on a secondary thread. Because this event is raised on a secondary thread, and not the main thread, attempting to modify some elements in the main thread, such as UI elements, could raise a threading exception.

If it is necessary to modify elements in the main Form or Control , post change requests back using Invoke , which will do the work on the proper thread. For more information about handling events, see Handling and Raising Events.

Skip to main content. This browser is no longer supported. Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object. Releases all resources used by the Component. Releases the unmanaged resources used by the SerialPort and optionally releases the managed resources. Retrieves the current lifetime service object that controls the lifetime policy for this instance.

Returns an object that represents a service provided by the Component or by its Container. Gets the Type of the current instance. Creates a shallow copy of the current Object. Creates a shallow copy of the current MarshalByRefObject object.

Reads a number of bytes from the SerialPort input buffer and writes those bytes into a byte array at the specified offset. Reads a number of characters from the SerialPort input buffer and writes them into an array of characters at a given offset. Synchronously reads one byte from the SerialPort input buffer. Synchronously reads one character from the SerialPort input buffer. Reads all immediately available bytes, based on the encoding, in both the stream and the input buffer of the SerialPort object.

Reads up to the NewLine value in the input buffer. Reads a string up to the specified value in the input buffer. Returns a String containing the name of the Component , if any. This method should not be overridden. Writes the specified string and the NewLine value to the output buffer. Indicates that data has been received through a port represented by the SerialPort object.

Occurs when the component is disposed by a call to the Dispose method. Indicates that an error has occurred with a port represented by a SerialPort object.

Indicates that a non-data signal event has occurred on the port represented by the SerialPort object. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode.

Serial Port Class Reference Is this page helpful? Please rate your experience Yes No. Any additional feedback? Namespace: System. Ports Assembly: System. Represents a serial port resource. PinChanged , DataReceived , and ErrorReceived events may be called out of order, and there may be a slight delay between when the underlying stream reports the error and when the event handler is executed.

Only one event handler can execute at a time. The DataReceived event is not guaranteed to be raised for every byte received. Use the BytesToRead property to determine how much data is left to be read in the buffer.

The DataReceived event is raised on a secondary thread when data is received from the SerialPort object. Because this event is raised on a secondary thread, and not the main thread, attempting to modify some elements in the main thread, such as UI elements, could raise a threading exception.

If it is necessary to modify elements in the main Form or Control , post change requests back using Invoke , which will do the work on the proper thread. For more information about handling events, see Handling and Raising Events. Skip to main content.