QuickOPC User's Guide and Reference
Callback Property (EasyDAItemSubscriptionArguments)



OpcLabs.EasyOpcClassic Assembly > OpcLabs.EasyOpc.DataAccess.OperationModel Namespace > EasyDAItemSubscriptionArguments Class : Callback Property
A callback method to be invoked for each significant monitored item change.
Syntax
'Declaration
 
<CanBeNullAttribute()>
<DefaultValueAttribute("")>
<XmlIgnoreAttribute()>
Public Property Callback As EasyDAItemChangedEventHandler
'Usage
 
Dim instance As EasyDAItemSubscriptionArguments
Dim value As EasyDAItemChangedEventHandler
 
instance.Callback = value
 
value = instance.Callback
[CanBeNull()]
[DefaultValue("")]
[XmlIgnore()]
public EasyDAItemChangedEventHandler Callback {get; set;}
[CanBeNull()]
[DefaultValue("")]
[XmlIgnore()]
public:
property EasyDAItemChangedEventHandler^ Callback {
   EasyDAItemChangedEventHandler^ get();
   void set (    EasyDAItemChangedEventHandler^ value);
}

Property Value

If this is a null reference, only the notification events are generated, but no callback method is invoked.
Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2012, Windows Server 2016; .NET Core, .NET 5, .NET 6: Linux, macOS, Microsoft Windows

See Also

Reference

EasyDAItemSubscriptionArguments Class
EasyDAItemSubscriptionArguments Members