OPC Studio User's Guide and Reference
DiscardOldest Property (_UAMonitoringParameters)



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA.ComTypes Namespace > _UAMonitoringParameters Interface : DiscardOldest Property
Specifies whether to discard the oldest notification when a new notification is to be queued into a full queue.
Syntax
'Declaration
 
Property DiscardOldest As Boolean
'Usage
 
Dim instance As _UAMonitoringParameters
Dim value As Boolean
 
instance.DiscardOldest = value
 
value = instance.DiscardOldest
bool DiscardOldest {get; set;}
property bool DiscardOldest {
   bool get();
   void set (    bool value);
}

Property Value

The default value of this property is True.

Remarks

"A boolean parameter that specifies the discard policy when the queue is full and a new Notification is to be queued. It has the following values:

The getter method of this property is pure, i.e. it does not have observable side effects.

This member or type is for use from COM. It is not meant to be used from .NET or Python. Refer to the corresponding .NET member or type instead, if you are developing in .NET or Python.

This method or property does not throw any exceptions, aside from execution exceptions such as System.Threading.ThreadAbortException or System.OutOfMemoryException.

Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows

See Also