OPC Studio User's Guide and Reference
UAEventFilter Constructor(UAAttributeFieldCollection)



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA Namespace > UAEventFilter Class > UAEventFilter Constructor : UAEventFilter Constructor(UAAttributeFieldCollection)
The select clauses.

The value of this parameter cannot be null (Nothing in Visual Basic).

The individual elements of the parameter value cannot be null (Nothing in Visual Basic).

Initializes a new instance of the class, specifying the Select clauses.
Syntax
'Declaration
 
Public Function New( _
   ByVal selectClauses As UAAttributeFieldCollection _
)
'Usage
 
Dim selectClauses As UAAttributeFieldCollection
 
Dim instance As New UAEventFilter(selectClauses)
public UAEventFilter( 
   UAAttributeFieldCollection selectClauses
)
public:
UAEventFilter( 
   UAAttributeFieldCollection^ selectClauses
)

Parameters

selectClauses
The select clauses.

The value of this parameter cannot be null (Nothing in Visual Basic).

The individual elements of the parameter value cannot be null (Nothing in Visual Basic).

Exceptions
ExceptionDescription

A null reference (Nothing in Visual Basic) is passed to a method that does not accept it as a valid argument.

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

In languages that support implicit conversions (such as C# or VB.NET), in many cases you do not have call this constructor explicitly. When indicated, a call to an available equivalent implicit conversion operator will be created by the compiler automatically.

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