OPC Studio User's Guide and Reference
QueryEventCategories Method (IEasyAEClientExtension)



OpcLabs.EasyOpcClassicCore Assembly > OpcLabs.EasyOpc.AlarmsAndEvents Namespace > IEasyAEClientExtension Class : QueryEventCategories Method
The QueryEventCategories method gives clients a means of finding out the specific categories of events supported by a given server. This method would typically be invoked prior to specifying an event filter. Servers are able to define their own custom event categories, but a list of recommended categories is provided in the OPC specification.
Overload List
OverloadDescription
QueryEventCategories(IEasyAEClient,ServerDescriptor)Finds out events categories supported by the server. Server descriptor is used for specifying the OPC server. Queries event categories for all available event types.  
QueryEventCategories(IEasyAEClient,String,String,AEEventType)Finds out events categories supported by the server. Computer name and server class are used for specifying the OPC server. Queries event categories for given event types.  
QueryEventCategories(IEasyAEClient,String,String)Finds out events categories supported by the server. Computer name and server class are used for specifying the OPC server. Queries event categories for all available event types.  
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

Reference

IEasyAEClientExtension Class
IEasyAEClientExtension Members

 

 

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