The example below shows how to get OPC UA file properties (such as its size or last modified time), using the file provider model.
// Shows how to get OPC UA file properties (such as its size or last modified time), using the file provider model. // // 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.BaseLib.Extensions.FileProviders; using OpcLabs.EasyOpc.UA; using OpcLabs.EasyOpc.UA.FileTransfer; namespace UADocExamples.FileProviders._FileInfo2 { class Properties { public static void Main1() { // Unified Automation .NET based demo server (UaNETServer/UaServerNET.exe) UAEndpointDescriptor endpointDescriptor = "opc.tcp://localhost:48030"; // A node that represents an instance of OPC UA FileType object. UANodeDescriptor fileNodeDescriptor = "nsu=http://www.unifiedautomation.com/DemoServer/ ;s=Demo.Files.TextFile"; // Instantiate the file transfer client object var fileTransferClient = new EasyUAFileTransferClient(); Console.WriteLine("Getting file info..."); IFileInfo2 fileInfo2 = fileTransferClient.GetFileInfo2(endpointDescriptor, fileNodeDescriptor); // From this point onwards, the code is independent of the concrete realization of the file provider, and would // be identical e.g. for files in the physical file system, if the corresponding file provider was used. // Get properties of a specified file. Console.WriteLine("Getting file properties..."); try { // Display result Console.WriteLine(); Console.WriteLine($"Exists: {fileInfo2.Exists}"); Console.WriteLine($"IsDirectory: {fileInfo2.IsDirectory}"); Console.WriteLine($"LastModified: {fileInfo2.LastModified}"); Console.WriteLine($"Length: {fileInfo2.Length}"); Console.WriteLine($"Name: {fileInfo2.Name}"); Console.WriteLine($"PhysicalPath: {fileInfo2.PhysicalPath}"); } // Methods in the file provider model throw IOException and other exceptions, but not UAException. catch (Exception exception) { Console.WriteLine($"*** Failure: {exception.GetBaseException().Message}"); return; } Console.WriteLine(); Console.WriteLine("Finished..."); } } }
' Shows how to get OPC UA file properties (such as its size or last modified time), using the file provider model. ' ' Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . ' OPC client and subscriber examples in VB.NET on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VBNET . ' Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own ' a commercial license in order to use Online Forums, and we reply to every post. Imports OpcLabs.BaseLib.Extensions.FileProviders Imports OpcLabs.EasyOpc.UA Imports OpcLabs.EasyOpc.UA.FileTransfer Namespace FileProviders._FileInfo2 Friend Class Properties Public Shared Sub Main1() ' Unified Automation .NET based demo server (UaNETServer/UaServerNET.exe) Dim endpointDescriptor As UAEndpointDescriptor = "opc.tcp://localhost:48030" ' A node that represents an instance of OPC UA FileType object. Dim fileNodeDescriptor As UANodeDescriptor = "nsu=http://www.unifiedautomation.com/DemoServer/ ;s=Demo.Files.TextFile" ' Instantiate the file transfer client object Dim fileTransferClient = New EasyUAFileTransferClient Console.WriteLine("Getting file info...") Dim fileInfo2 As IFileInfo2 = fileTransferClient.GetFileInfo2(endpointDescriptor, fileNodeDescriptor) ' From this point onwards, the code is independent of the concrete realization of the file provider, and would ' be identical e.g. for files in the physical file system, if the corresponding file provider was used. ' Get properties of a specified file. Console.WriteLine("Getting file properties...") Try ' Display result Console.WriteLine() Console.WriteLine($"Exists: {fileInfo2.Exists}") Console.WriteLine($"IsDirectory: {fileInfo2.IsDirectory}") Console.WriteLine($"LastModified: {fileInfo2.LastModified}") Console.WriteLine($"Length: {fileInfo2.Length}") Console.WriteLine($"Name: {fileInfo2.Name}") Console.WriteLine($"PhysicalPath: {fileInfo2.PhysicalPath}") ' Methods in the file provider model throw IOException and other exceptions, but not UAException. Catch exception As Exception Console.WriteLine("*** Failure: {0}", exception.GetBaseException.Message) Exit Sub End Try Console.WriteLine() Console.WriteLine("Finished...") End Sub End Class End Namespace
# Shows how to get OPC UA file properties (such as its size or last modified time), using the file provider model. # # 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.Extensions.FileProviders import * from OpcLabs.EasyOpc.UA import * from OpcLabs.EasyOpc.UA.FileTransfer import * from OpcLabs.EasyOpc.UA.Navigation import * # Unified Automation .NET based demo server (UaNETServer/UaServerNET.exe). endpointDescriptor = UAEndpointDescriptor('opc.tcp://localhost:48030') # A node that represents an instance of OPC UA FileType object. fileNodeDescriptor = UANodeDescriptor('nsu=http://www.unifiedautomation.com/DemoServer/ ;s=Demo.Files.TextFile') # Instantiate the file transfer client object. fileTransferClient = EasyUAFileTransferClient() print('Getting file info......') fileInfo2 = IEasyUAFileTransferExtension.GetFileInfo2(fileTransferClient, endpointDescriptor, UANamedNodeDescriptor(fileNodeDescriptor)) # From this point onwards, the code is independent of the concrete realization of the file provider, and would # be identical e.g. for files in the physical file system, if the corresponding file provider was used. # Get properties of a specified file. try: # Display result. print() print('Exists: ', fileInfo2.Exists, sep='') print('IsDirectory: ', fileInfo2.IsDirectory, sep='') print('LastModified: ', fileInfo2.LastModified, sep='') print('Length: ', fileInfo2.Length, sep='') print('Name: ', fileInfo2.Name, sep='') print('PhysicalPath: ', fileInfo2.PhysicalPath, sep='') # Methods in the file provider model throw IOException and other exceptions, but not UAException. except Exception as exception: print('*** Failure: ' + exception.GetBaseException().Message) exit() print() print('Finished.')
Copyright © 2004-2024 CODE Consulting and Development, s.r.o., Plzen. All rights reserved.
Documentation Home, Send Documentation Feedback. Technical Support