// This example shows how to read a single item using a browse path, and display its value, timestamp and quality. // // Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . // OPC client and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-CSharp . // Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own // a commercial license in order to use Online Forums, and we reply to every post. using System; using OpcLabs.EasyOpc; using OpcLabs.EasyOpc.DataAccess; using OpcLabs.EasyOpc.OperationModel; namespace DocExamples.DataAccess._EasyDAClient { partial class ReadItem { public static void BrowsePath() { // Instantiate the client object. var client = new EasyDAClient(); DAVtq vtq; try { vtq = client.ReadItem( new ServerDescriptor("", "OPCLabs.KitServer.2"), new DAItemDescriptor(null, "/Simulation/Random")); } catch (OpcException opcException) { Console.WriteLine("*** Failure: {0}", opcException.GetBaseException().Message); return; } Console.WriteLine("Vtq: {0}", vtq); } } }
' This example shows how to read a single item using a browse path, and display its value, timestamp and quality. ' ' Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . ' OPC client and subscriber examples in VB.NET on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VBNET . ' Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own ' a commercial license in order to use Online Forums, and we reply to every post. Imports OpcLabs.EasyOpc Imports OpcLabs.EasyOpc.DataAccess Imports OpcLabs.EasyOpc.OperationModel Namespace DataAccess._EasyDAClient Partial Friend Class ReadItem Public Shared Sub BrowsePath() Dim client = New EasyDAClient() Dim vtq As DAVtq Try vtq = client.ReadItem(New ServerDescriptor("", "OPCLabs.KitServer.2"), New DAItemDescriptor(Nothing, "/Simulation/Random")) Catch opcException As OpcException Console.WriteLine("*** Failure: {0}", opcException.GetBaseException().Message) Exit Sub End Try Console.WriteLine("Vtq: {0}", vtq) End Sub End Class End Namespace
# This example shows how to read a single item using a browse path, and display its value, timestamp and quality. # # 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 . # Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own # a commercial license in order to use Online Forums, and we reply to every post. # The QuickOPC package is needed. Install it using "pip install opclabs_quickopc". import opclabs_quickopc # Import .NET namespaces. from OpcLabs.BaseLib.Navigation import * from OpcLabs.EasyOpc import * from OpcLabs.EasyOpc.DataAccess import * from OpcLabs.EasyOpc.OperationModel import * # Instantiate the client object. client = EasyDAClient() # Perform the operation. try: vtq = IEasyDAClientExtension.ReadItem(client, ServerDescriptor('', 'OPCLabs.KitServer.2'), DAItemDescriptor(None, BrowsePath('/Simulation/Random'))) except OpcException as opcException: print('*** Failure: ' + opcException.GetBaseException().Message) exit() # Display results. print('Vtq: ', vtq, sep='')
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