SerialPort.PinChanged Event

Represents the method that will handle the serial pin changed event of a SerialPort object.

Namespace:  System.IO.Ports
Assembly:  System (in System.dll)

public event SerialPinChangedEventHandler PinChanged

Serial pin changed events can be caused by any of the items in the SerialPinChange enumeration. Because the operating system determines whether to raise this event or not, not all parity errors may be reported. As part of the event, the new value of the pin is set.

The PinChanged event is raised when a SerialPort object enters the BreakState, but not when the port exits the BreakState. 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.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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