'DeclarationPublic Property Quality As DAQuality
'UsageDim instance As AEEventData Dim value As DAQuality instance.Quality = value value = instance.Quality
public DAQuality Quality {get; set;}
public: property DAQuality^ Quality { DAQuality^ get(); void set ( DAQuality^ value); }
The value of this property cannot be null (Nothing in Visual Basic).
| Exception | Description |
|---|---|
| System.ArgumentNullException |
A 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. |
This property is used only for Condition-Related Events (see EventType).
Values are as defined for the OPC Quality Flags in the OPC Data Access Server specification.
Because there are implicit conversions to OpcLabs.EasyOpc.DataAccess.DAQuality from System.Int32 or 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 OpcLabs.EasyOpc.DataAccess.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 OpcLabs.EasyOpc.DataAccess.DAQualities enumeration value. When the implicit conversion operators are not supported (such as with Python.NET), you can use the OpcLabs.EasyOpc.DataAccess.DAQuality.DAQuality Constructor(Int32) or OpcLabs.EasyOpc.DataAccess.DAQuality.DAQuality Constructor(DAQualities) constructor, or the OpcLabs.EasyOpc.DataAccess.DAQuality.ToInt32 or OpcLabs.EasyOpc.DataAccess.DAQuality.ToDAQualities static method instead.