'Declaration
 
Public Overridable Function CanHaveNullValue( _
   ByVal propertyId As DAPropertyId _
) As Boolean

'Usage
 
Dim instance As DAItemPropertyRecord
Dim propertyId As DAPropertyId
Dim value As Boolean
 
value = instance.CanHaveNullValue(propertyId)

public virtual bool CanHaveNullValue( 
   DAPropertyId propertyId
)

public:
virtual bool CanHaveNullValue( 
   DAPropertyId^ propertyId
) 

Parameters

propertyId

The ID of the property to be tested.

Because the OpcLabs.EasyOpc.DataAccess.DAPropertyId has an implicit conversion from System.Int64 and OpcLabs.EasyOpc.DataAccess.DAPropertyIds, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a long integer (representing the numerical value of the access rights), or an element of the OpcLabs.EasyOpc.DataAccess.DAPropertyIds enumeration in place of this parameter, and the corresponding Property Id specification will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the DAPropertyId Constructor(Int64) or DAPropertyId Constructor(DAPropertyIds) constructor instead.

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

Return Value

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows