OPC Studio User's Guide and Reference
HasValue Property (_UADataValue)



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA.ComTypes Namespace > _UADataValue Interface : HasValue Property
Determines whether there is a valid value in the data value (depends on the status code).
Syntax
'Declaration
 
ReadOnly Property HasValue As Boolean
'Usage
 
Dim instance As _UADataValue
Dim value As Boolean
 
value = instance.HasValue
bool HasValue {get;}
property bool HasValue {
   bool get();
}

Property Value

True if there is a valid value in the data value; false otherwise.

The default value of this property is True.

Remarks

This member or type is for use from COM. It is not meant to be used from .NET or Python. Refer to the corresponding .NET member or type instead, if you are developing in .NET or Python.

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