OPC Studio User's Guide and Reference
DAVtq Constructor(Object,DAQuality)



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

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

The quality of the data.

Because the DAQuality has an implicit conversion from System.Int32 and 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 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 Object, _
   ByVal quality As DAQuality _
)
'Usage
 
Dim value As Object
Dim quality As DAQuality
 
Dim instance As New DAVtq(value, quality)
public DAVtq( 
   object value,
   DAQuality quality
)
public:
DAVtq( 
   Object^ 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 DAQuality has an implicit conversion from System.Int32 and 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 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).

Remarks

This method or property does not throw any exceptions, aside from execution exceptions such as System.Threading.ThreadAbortException or System.OutOfMemoryException.

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