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



OpcLabs.EasyOpcClassicCore Assembly > OpcLabs.EasyOpc Namespace > NodeDescriptor Class : IsNull Property
Determines whether the node descriptor is null, i.e. specifies neither node ID nor a browse path.
Syntax
'Declaration
 
<DefaultValueAttribute(True)>
<XmlIgnoreAttribute()>
Public ReadOnly Property IsNull As Boolean
'Usage
 
Dim instance As NodeDescriptor
Dim value As Boolean
 
value = instance.IsNull
[DefaultValue(true)]
[XmlIgnore()]
public bool IsNull {get;}
[DefaultValue(true)]
[XmlIgnore()]
public:
property bool IsNull {
   bool get();
}
Remarks

This method or property does not throw any exceptions, aside from execution exceptions such as System.Threading.ThreadAbortException or System.OutOfMemoryException.

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