OPC Studio User's Guide and Reference
Add Method (UAEventFilterBuilder)



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA Namespace > UAEventFilterBuilder Class : Add Method
Select clause to be added.

Because the UAAttributeField has an implicit conversion from OpcLabs.EasyOpc.UA.Filtering.UASimpleAttributeOperand, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a OpcLabs.EasyOpc.UA.Filtering.UASimpleAttributeOperand in place of this parameter, and the corresponding OPC UA attribute field will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the FromUASimpleAttributeOperand static method instead.

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

Adds a select clause to the event filter.
Syntax
'Declaration
 
Public Sub Add( _
   ByVal selectClause As UAAttributeField _
) 
'Usage
 
Dim instance As UAEventFilterBuilder
Dim selectClause As UAAttributeField
 
instance.Add(selectClause)
public void Add( 
   UAAttributeField selectClause
)
public:
void Add( 
   UAAttributeField^ selectClause
) 

Parameters

selectClause
Select clause to be added.

Because the UAAttributeField has an implicit conversion from OpcLabs.EasyOpc.UA.Filtering.UASimpleAttributeOperand, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a OpcLabs.EasyOpc.UA.Filtering.UASimpleAttributeOperand in place of this parameter, and the corresponding OPC UA attribute field will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the FromUASimpleAttributeOperand static method instead.

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

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