'Declaration
Public Event LogEntry As LogEntryEventHandler
'Usage
Dim instance As EasyUAClientCore Dim handler As LogEntryEventHandler AddHandler instance.LogEntry, handler
public event LogEntryEventHandler LogEntry
public: event LogEntryEventHandler^ LogEntry
Event Data
The event handler receives an argument of type LogEntryEventArgs containing data related to this event. The following LogEntryEventArgs properties provide information specific to this event.
Property | Description |
---|---|
Category | The application-specific subcategory associated with the message. |
DefaultTimestamp | Default value of the Timestamp property. |
EntryType | Entry type. One of the LogEntryType values. |
EventId | The application-specific identifier for the event. |
Message | The message text. |
RawData | An array of bytes that holds the binary data associated with the entry. |
Source | The name of the event source. |
Timestamp | Date and time of the log entry message. In UTC. |
TimestampDouble | Date and time of the log entry message. In UTC, as double-precision floating-point number that contains an OLE Automation date. |
TimestampLocal | Date and time of the log entry message. In local time. |
TimestampLocalDouble | Date and time of the log entry message. In local time, as double-precision floating-point number that contains an OLE Automation date. |
Example
.NET
// This example demonstrates the loggable entries originating in the OPC-UA client engine and the EasyUAClient component. // // Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . using System; using OpcLabs.BaseLib.Instrumentation; using OpcLabs.EasyOpc.UA; using OpcLabs.EasyOpc.UA.OperationModel; namespace UADocExamples._EasyUAClient { class LogEntry { public static void Main1() { UAEndpointDescriptor endpointDescriptor = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer"; // or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported) // or "https://opcua.demo-this.com:51212/UA/SampleServer/" // Hook static events EasyUAClient.LogEntry += EasyUAClientOnLogEntry; try { // Do something - invoke an OPC read, to trigger some loggable entries. var client = new EasyUAClient(); try { client.ReadValue(endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10853"); } catch (UAException uaException) { Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message); return; } Console.WriteLine("Processing log entry events for 1 minute..."); System.Threading.Thread.Sleep(60 * 1000); Console.WriteLine("Finished."); } finally { // Unhook static events EasyUAClient.LogEntry -= EasyUAClientOnLogEntry; } } // Event handler for the LogEntry event. It simply prints out the event. private static void EasyUAClientOnLogEntry(object sender, LogEntryEventArgs logEntryEventArgs) { Console.WriteLine(logEntryEventArgs); } } }
# This example demonstrates the loggable entries originating in the OPC-UA client engine and the EasyUAClient component. # # Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . # OPC client and subscriber examples in Python on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-Python . # The QuickOPC package is needed. Install it using "pip install opclabs_quickopc". import opclabs_quickopc import time # Import .NET namespaces. from OpcLabs.EasyOpc.UA import * from OpcLabs.EasyOpc.UA.OperationModel import * # Event handler for the LogEntry event. It simply prints out the event. def onLogEntry(sender, logEntryEventArgs): print(logEntryEventArgs) endpointDescriptor = UAEndpointDescriptor('opc.tcp://opcua.demo-this.com:51210/UA/SampleServer') # or 'http://opcua.demo-this.com:51211/UA/SampleServer' (currently not supported) # or 'https://opcua.demo-this.com:51212/UA/SampleServer/' # Hook static events. EasyUAClient.LogEntry += onLogEntry # Instantiate the client object. client = EasyUAClient() # Do something - invoke an OPC read, to trigger some loggable entries. try: value = IEasyUAClientExtension.ReadValue(client, endpointDescriptor, UANodeDescriptor('nsu=http://test.org/UA/Data/ ;i=10853')) except UAException as uaException: print('*** Failure: ' + uaException.GetBaseException().Message) exit() print('Processing log entry events for 1 minute...') time.sleep(60) print() print('Finished.')
' This example demonstrates the loggable entries originating in the OPC-UA client engine and the EasyUAClient component. ' ' Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . Imports OpcLabs.BaseLib.Instrumentation Imports OpcLabs.EasyOpc.UA Imports OpcLabs.EasyOpc.UA.OperationModel Namespace _EasyUAClient Friend Class LogEntry Public Shared Sub Main1() Dim endpointDescriptor As UAEndpointDescriptor = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer" ' or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported) ' or "https://opcua.demo-this.com:51212/UA/SampleServer/" ' Hook static events AddHandler EasyUAClient.LogEntry, AddressOf EasyUAClientOnLogEntry Try ' Do something - invoke an OPC read, to trigger some loggable entries. Dim client = New EasyUAClient() Try client.ReadValue(endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10853") Catch uaException As UAException Console.WriteLine("*** Failure: {0}", uaException.GetBaseException.Message) Exit Sub End Try Console.WriteLine("Processing log entry events for 1 minute...") Threading.Thread.Sleep(60 * 1000) Console.WriteLine("Finished.") Finally ' Unhook static events RemoveHandler EasyUAClient.LogEntry, AddressOf EasyUAClientOnLogEntry End Try End Sub ' Event handler for the LogEntry event. It simply prints out the event. Private Shared Sub EasyUAClientOnLogEntry(ByVal sender As Object, ByVal logEntryEventArgs As LogEntryEventArgs) Console.WriteLine(logEntryEventArgs) End Sub End Class End Namespace
Requirements