'Declaration
 
Public Function New( _
   ByVal serverDescriptor As ServerDescriptor, _
   ByVal nodeDescriptor As DANodeDescriptor, _
   ByVal propertyDescriptor As DAPropertyDescriptor _
)

'Usage
 
Dim serverDescriptor As ServerDescriptor
Dim nodeDescriptor As DANodeDescriptor
Dim propertyDescriptor As DAPropertyDescriptor
 
Dim instance As New DAClientPropertySource(serverDescriptor, nodeDescriptor, propertyDescriptor)

public DAClientPropertySource( 
   ServerDescriptor serverDescriptor,
   DANodeDescriptor nodeDescriptor,
   DAPropertyDescriptor propertyDescriptor
)

public:
DAClientPropertySource( 
   ServerDescriptor^ serverDescriptor,
   DANodeDescriptor^ nodeDescriptor,
   DAPropertyDescriptor^ propertyDescriptor
)

Parameters

serverDescriptor

The OPC server involved in the operation.

Because the OpcLabs.EasyOpc.ServerDescriptor has an implicit conversion from System.Guid, System.String and OpcLabs.EasyOpc.ServerElement, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a GUID (representing the CLSID of the server), a string (representing the so-called OPC server descriptor string, such as a ProgID or the URL of the server), or a OpcLabs.EasyOpc.ServerElement object (result from OPC browsing), in place of this parameter, and the corresponding OPC server descriptor will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the OpcLabs.EasyOpc.ServerDescriptor.FromGuid, OpcLabs.EasyOpc.ServerDescriptor.FromString or OpcLabs.EasyOpc.ServerDescriptor.FromServerElement static method instead.

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

nodeDescriptor

The OPC node involved in the operation.

Because the OpcLabs.EasyOpc.DataAccess.DANodeDescriptor has an implicit conversion from System.String and OpcLabs.EasyOpc.DataAccess.AddressSpace.DANodeElement, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a string (representing the qualified name of the node), or a OpcLabs.EasyOpc.DataAccess.AddressSpace.DANodeElement object (result from OPC browsing), in place of this parameter, and the corresponding OPC DA node descriptor will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the OpcLabs.EasyOpc.DataAccess.DANodeDescriptor.FromString or OpcLabs.EasyOpc.DataAccess.DANodeDescriptor.FromDANodeElement static method instead.

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

propertyDescriptor

The descriptor of the OPC property involved in the operation.

Because the OpcLabs.EasyOpc.DataAccess.DAPropertyDescriptor has an implicit conversion from System.Int64, OpcLabs.EasyOpc.DataAccess.DAPropertyIds, System.Xml.XmlQualifiedName, System.String, OpcLabs.EasyOpc.DataAccess.DAPropertyId and OpcLabs.EasyOpc.DataAccess.AddressSpace.DAPropertyElement, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a such values in place of this parameter, and the corresponding OPC DA property descriptor will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the OpcLabs.EasyOpc.DataAccess.DAPropertyDescriptor.FromInt64, OpcLabs.EasyOpc.DataAccess.DAPropertyDescriptor.FromDAPropertyIds, OpcLabs.EasyOpc.DataAccess.DAPropertyDescriptor.FromXmlQualifiedName, OpcLabs.EasyOpc.DataAccess.DAPropertyDescriptor.FromDAPropertyId or OpcLabs.EasyOpc.DataAccess.DAPropertyDescriptor.FromDAPropertyElementstatic method instead.

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

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