'Declaration
 
<NotNullAttribute()>
Public Overloads Shared Function Create(Of TValue)( _
   ByVal serverDescriptor As ServerDescriptor, _
   ByVal itemDescriptor As DAItemDescriptor _
) As DAWriteItemValueObserver(Of TValue)

'Usage
 
Dim serverDescriptor As ServerDescriptor
Dim itemDescriptor As DAItemDescriptor
Dim value As DAWriteItemValueObserver(Of TValue)
 
value = DAWriteItemValueObserver.Create(Of TValue)(serverDescriptor, itemDescriptor)

[NotNull()]
public static DAWriteItemValueObserver<TValue> Create<TValue>( 
   ServerDescriptor serverDescriptor,
   DAItemDescriptor itemDescriptor
)

[NotNull()]
public:
static DAWriteItemValueObserver<TValue^>^ Creategeneric<typename TValue>
( 
   ServerDescriptor^ serverDescriptor,
   DAItemDescriptor^ itemDescriptor
) 

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).

itemDescriptor

The OPC item to be written into.

Because the OpcLabs.EasyOpc.DataAccess.DAItemDescriptor 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 item 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.DAItemDescriptor.FromString or OpcLabs.EasyOpc.DataAccess.DAItemDescriptor.FromDANodeElement static method instead.

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

Type Parameters

TValue

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