OPC Studio User's Guide and Reference
DAVtq<TValue> Constructor(TValue,DAQuality)



OpcLabs.EasyOpcClassicCore Assembly > OpcLabs.EasyOpc.DataAccess.Generic Namespace > DAVtq<TValue> Class > DAVtq<TValue> Constructor : DAVtq<TValue> Constructor(TValue,DAQuality)
The actual data value.

The value of this parameter can be null (Nothing in Visual Basic).

The quality of the data.

Because the OpcLabs.EasyOpc.DataAccess.DAQuality has an implicit conversion from System.Int32 and OpcLabs.EasyOpc.DataAccess.DAQualities, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use an integer (representing the internal value of the quality), or an element of the OpcLabs.EasyOpc.DataAccess.DAQualities enumeration in place of this parameter, and the corresponding OPC DA quality object will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the DAQuality Constructor(Int32) or DAQuality Constructor(DAQualities) constructor instead.

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

Initializes a new instance of the class, with the specified data value and quality.
Syntax
'Declaration
 
Public Function New( _
   ByVal value As TValue, _
   ByVal quality As DAQuality _
)
'Usage
 
Dim value As TValue
Dim quality As DAQuality
 
Dim instance As New DAVtq(Of TValue)(value, quality)
public DAVtq<TValue>( 
   TValue value,
   DAQuality quality
)
public:
DAVtq<TValue>( 
   TValue^ value,
   DAQuality^ quality
)

Parameters

value
The actual data value.

The value of this parameter can be null (Nothing in Visual Basic).

quality
The quality of the data.

Because the OpcLabs.EasyOpc.DataAccess.DAQuality has an implicit conversion from System.Int32 and OpcLabs.EasyOpc.DataAccess.DAQualities, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use an integer (representing the internal value of the quality), or an element of the OpcLabs.EasyOpc.DataAccess.DAQualities enumeration in place of this parameter, and the corresponding OPC DA quality object will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the DAQuality Constructor(Int32) or DAQuality Constructor(DAQualities) constructor instead.

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