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



OpcLabs.EasyOpcClassicCore Assembly > OpcLabs.EasyOpc.DataAccess Namespace > DAPropertyDescriptor Class > DAPropertyDescriptor Constructor : DAPropertyDescriptor Constructor(DAPropertyId)
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).

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

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).

Remarks

In languages that support implicit conversions (such as C# or VB.NET), in many cases you do not have call this constructor explicitly. When indicated, a call to an available equivalent implicit conversion operator will be created by the compiler automatically.

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