QuickOPC User's Guide and Reference
IsNull Property (UAAttributeOperand)



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA.Filtering Namespace > UAAttributeOperand Class : IsNull Property
Determines whether the attribute operand is null, i.e. specifies no type ID.
Syntax
'Declaration
 
<DefaultValueAttribute(True)>
<XmlIgnoreAttribute()>
Public ReadOnly Property IsNull As Boolean
'Usage
 
Dim instance As UAAttributeOperand
Dim value As Boolean
 
value = instance.IsNull
[DefaultValue(true)]
[XmlIgnore()]
public bool IsNull {get;}
[DefaultValue(true)]
[XmlIgnore()]
public:
property bool IsNull {
   bool get();
}
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