'Declaration
 
<CanBeNullAttribute()>
Protected Overrides NotOverridable Function GetMetaValue( _
   ByVal metaName As String, _
   ByVal targetObject As Object, _
   ByVal mappingContext As AbstractMappingContext, _
   ByVal mapper As AbstractMapper _
) As Object

'Usage
 
Dim instance As DAMappingProvider
Dim metaName As String
Dim targetObject As Object
Dim mappingContext As AbstractMappingContext
Dim mapper As AbstractMapper
Dim value As Object
 
value = instance.GetMetaValue(metaName, targetObject, mappingContext, mapper)

[CanBeNull()]
protected override object GetMetaValue( 
   string metaName,
   object targetObject,
   AbstractMappingContext mappingContext,
   AbstractMapper mapper
)

[CanBeNull()]
protected:
Object^ GetMetaValue( 
   String^ metaName,
   Object^ targetObject,
   AbstractMappingContext^ mappingContext,
   AbstractMapper^ mapper
) override 

Parameters

metaName

The name of the meta-member.

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

targetObject

The target object.

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

mappingContext

The mapping context.

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

mapper

The current mapper.

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

Return Value

OpcLabs.EasyOpc.LiveMapping.CommonMappingProvider supports following meta-members:

• GroupParameters: OpcLabs.EasyOpc.DataAccess.DAGroupParameters, an object containing subscription parameters, such as the requested update rate.
• NodeDescriptor: OpcLabs.EasyOpc.DataAccess.DANodeDescriptor, the descriptor of the OPC node involved in the operation.
• ReadParameters: OpcLabs.EasyOpc.DataAccess.DAReadParameters, the read parameters (such as data source or value age).

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