OPC Studio User's Guide and Reference
QueueSize Property (UAMonitoringParameters)



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA Namespace > UAMonitoringParameters Class : QueueSize Property
The requested size of the MonitoredItem queue.
Syntax
'Declaration
 
<ValueRangeAttribute(0, 2147483647)>
Public Property QueueSize As Integer
'Usage
 
Dim instance As UAMonitoringParameters
Dim value As Integer
 
instance.QueueSize = value
 
value = instance.QueueSize
[ValueRange(0, 2147483647)]
public int QueueSize {get; set;}
[ValueRange(0, 2147483647)]
public:
property int QueueSize {
   int get();
   void set (    int value);
}

Property Value

Valid values of this property are in the range from 0 to 2147483647 (Int32.MaxValue).

The default value of this property is 0.

Exceptions
ExceptionDescription

The value of an argument is outside the allowable range of values as defined by the invoked method.

This is a usage error, i.e. it will never occur (the exception will not be thrown) in a correctly written program. Your code should not catch this exception.

Remarks

Zero queue size denotes a server default, however some servers do not handle it well with event monitored items.

In order to obtain or modify this parameter, access the OpcLabs.EasyOpc.UA.OperationModel.UAMonitoredItemArguments.MonitoringParameters.

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

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