SerialPort.CDHolding Property
Definition
Important
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Gets the state of the Carrier Detect line for the port.
public:
property bool CDHolding { bool get(); };public bool CDHolding { get; }[System.ComponentModel.Browsable(false)]
public bool CDHolding { get; }member this.CDHolding : bool[<System.ComponentModel.Browsable(false)>]
member this.CDHolding : boolPublic ReadOnly Property CDHolding As BooleanProperty Value
true if the carrier is detected; otherwise, false.
- Attributes
Exceptions
The port is in an invalid state.
-or-
An attempt to set the state of the underlying port failed. For example, the parameters passed from this SerialPort object were invalid.
The stream is closed. This can occur because the Open() method has not been called or the Close() method has been called.
Remarks
This property can be used to monitor the state of the carrier detection line for a port. No carrier usually indicates that the receiver has hung up and the carrier has been dropped.
