OPC Studio User's Guide and Reference
Null Property (UASimpleAttributeOperand)



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA.Filtering Namespace > UASimpleAttributeOperand Class : Null Property
A null simple attribute operand (contains a null type ID).
Syntax
'Declaration
 
<NotNullAttribute()>
Public Shared ReadOnly Property Null As UASimpleAttributeOperand
'Usage
 
Dim value As UASimpleAttributeOperand
 
value = UASimpleAttributeOperand.Null
[NotNull()]
public static UASimpleAttributeOperand Null {get;}
[NotNull()]
public:
static property UASimpleAttributeOperand^ Null {
   UASimpleAttributeOperand^ get();
}

Property Value

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

Because the OpcLabs.EasyOpc.UA.UAAttributeField has an implicit conversion from UASimpleAttributeOperand, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use the returned UASimpleAttributeOperand in any place where OpcLabs.EasyOpc.UA.UAAttributeField is expected as input, 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 OpcLabs.EasyOpc.UA.UAAttributeField.FromUASimpleAttributeOperand static method instead.

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