QuickOPC User's Guide and Reference
FindEventCondition Method



OpcLabs.EasyOpcClassic Assembly > OpcLabs.EasyOpc.AlarmsAndEvents.Extensions Namespace > IEasyAEClientExtension2 Class : FindEventCondition Method
The client object that will perform the operation.
The OPC server involved in the operation.
Event category whose conditions should be searched.
Event condition name to be found.
Information about the event condition, if found.
Attempts to find a specified event condition in the OPC server and for given event category, and returns information about it when found.
Syntax
'Declaration
 
<ExtensionAttribute()>
Public Shared Function FindEventCondition( _
   ByVal client As IEasyAEClient, _
   ByVal serverDescriptor As ServerDescriptor, _
   ByVal categoryId As Long, _
   ByVal conditionName As String, _
   ByRef conditionElement As AEConditionElement _
) As Boolean
'Usage
 
Dim client As IEasyAEClient
Dim serverDescriptor As ServerDescriptor
Dim categoryId As Long
Dim conditionName As String
Dim conditionElement As AEConditionElement
Dim value As Boolean
 
value = IEasyAEClientExtension2.FindEventCondition(client, serverDescriptor, categoryId, conditionName, conditionElement)

Parameters

client
The client object that will perform the operation.
serverDescriptor
The OPC server involved in the operation.
categoryId
Event category whose conditions should be searched.
conditionName
Event condition name to be found.
conditionElement
Information about the event condition, if found.

Return Value

Returns 'true' if the event condition has been found, 'false' otherwise.
Exceptions
ExceptionDescription
A null reference (Nothing in Visual Basic) is passed to a method that does not accept it as a valid argument.
The value of an argument is outside the allowable range of values as defined by the invoked method.
The OPC "Classic" (or OPC XML-DA) operation has failed.
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

IEasyAEClientExtension2 Class
IEasyAEClientExtension2 Members