OPC Studio User's Guide and Reference
DAPropertyDescriptor Constructor(DAPropertyId,String)



OpcLabs.EasyOpcClassicCore Assembly > OpcLabs.EasyOpc.DataAccess Namespace > DAPropertyDescriptor Class > DAPropertyDescriptor Constructor : DAPropertyDescriptor Constructor(DAPropertyId,String)
Contains Id of the OPC property.

Because the DAPropertyId has an implicit conversion from System.Int64 and 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 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.DAPropertyId Constructor(Int64) or DAPropertyId.DAPropertyId Constructor(DAPropertyIds) constructor instead.

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

The qualified name for this property (used with OPC XML-DA).

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

Initializes a new instance of the class, with specified OPC property Id and qualified name.
Syntax
'Declaration
 
Public Function New( _
   ByVal propertyId As DAPropertyId, _
   ByVal qualifiedNameString As String _
)
'Usage
 
Dim propertyId As DAPropertyId
Dim qualifiedNameString As String
 
Dim instance As New DAPropertyDescriptor(propertyId, qualifiedNameString)
public DAPropertyDescriptor( 
   DAPropertyId propertyId,
   string qualifiedNameString
)
public:
DAPropertyDescriptor( 
   DAPropertyId^ propertyId,
   String^ qualifiedNameString
)

Parameters

propertyId
Contains Id of the OPC property.

Because the DAPropertyId has an implicit conversion from System.Int64 and 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 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.DAPropertyId Constructor(Int64) or DAPropertyId.DAPropertyId Constructor(DAPropertyIds) constructor instead.

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

qualifiedNameString
The qualified name for this property (used with OPC XML-DA).

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

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