OPC Studio User's Guide and Reference
Quality Property (DAVtq)



OpcLabs.EasyOpcClassicCore Assembly > OpcLabs.EasyOpc.DataAccess Namespace > DAVtq Class : Quality Property
Gets or sets the quality.
Syntax
'Declaration
 
<DataMemberAttribute()>
Public Property Quality As DAQuality
'Usage
 
Dim instance As DAVtq
Dim value As DAQuality
 
instance.Quality = value
 
value = instance.Quality
[DataMember()]
public DAQuality Quality {get; set;}
[DataMember()]
public:
property DAQuality^ Quality {
   DAQuality^ get();
   void set (    DAQuality^ value);
}

Property Value

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

Exceptions
ExceptionDescription

A null reference (Nothing in Visual Basic) is passed to a method that does not accept it as a valid argument.

This is a usage error, i.e. it will never occur (the exception will not be thrown) in a correctly written program. Your code should not catch this exception.

Remarks

Because there are implicit conversions to DAQuality from System.Int32 or 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 DAQuality value when setting this property, and the corresponding quality specification will be constructed automatically. Conversely, you can simply use the return value in place of a System.Int32 (representing the internal value of the quality), or in place a DAQualities enumeration value. 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, or the ToInt32 or ToDAQualities static method instead.

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