The example below shows how to create and delete OPC UA directories, using the file transfer client.
// Shows how to create and delete OPC UA directories, using the file transfer client. // Note: Consider using a higher-level abstraction, OPC UA file provider, instead. // // 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.UA; using OpcLabs.EasyOpc.UA.AddressSpace; using OpcLabs.EasyOpc.UA.Extensions; using OpcLabs.EasyOpc.UA.FileTransfer; using OpcLabs.EasyOpc.UA.OperationModel; namespace UADocExamples.FileTransfer._EasyUAFileTransferClient { class CreateDirectoryAndDelete { public static void Main1() { // Unified Automation .NET based demo server (UaNETServer/UaServerNET.exe) var endpointDescriptor = new UAEndpointDescriptor("opc.tcp://localhost:48030") .WithUserNameIdentity("john", "master"); // An object that aggregates an OPC UA file system. UANodeDescriptor objectDescriptor = "nsu=http://www.unifiedautomation.com/DemoServer/ ;s=Demo.Files"; // Create a random number generator - will be used for file/directory names. var random = new Random(); // Instantiate the file transfer client object var fileTransferClient = new EasyUAFileTransferClient(); // Create two directories, and one nested directory, and delete the first one. try { // The file system node is a root directory of the file system. Console.WriteLine("Getting file system..."); UANodeDescriptor fileSystemNodeDescriptor = fileTransferClient.GetFileSystem(endpointDescriptor, objectDescriptor); string directoryName1 = "MyDirectory1-" + random.Next(); Console.WriteLine($"Creating first directory, '{directoryName1}'..."); UANodeId directoryNodeId1 = fileTransferClient.CreateDirectory(endpointDescriptor, fileSystemNodeDescriptor, directoryName1); Console.WriteLine($"Node Id of the first directory: {directoryNodeId1}"); string directoryName2 = "MyDirectory2-" + random.Next(); Console.WriteLine($"Creating second directory, '{directoryName2}'..."); UANodeId directoryNodeId2 = fileTransferClient.CreateDirectory(endpointDescriptor, fileSystemNodeDescriptor, directoryName2); Console.WriteLine($"Node Id of the second directory: {directoryNodeId2}"); string nestedDirectoryName = "MyDirectory3-" + random.Next(); Console.WriteLine($"Creating nested directory, '{nestedDirectoryName}'..."); // Note how directoryNodeId2 (a parent directory) is passed as the 2nd argument to the CreateDirectory method. UANodeId nestedDirectoryNodeId = fileTransferClient.CreateDirectory(endpointDescriptor, directoryNodeId2, nestedDirectoryName); Console.WriteLine($"Node Id of the nested directory: {nestedDirectoryNodeId}"); // At this moment, the directory structure we have created looks like this: // * MyDirectory1 // * MyDirectory2 // * * MyDirectory3 Console.WriteLine("Deleting the first directory..."); fileTransferClient.DeleteDirectory(endpointDescriptor, fileSystemNodeDescriptor, directoryName1); } catch (UAException uaException) { Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message); return; } Console.WriteLine("Finished..."); } } }
' Shows how to create and delete OPC UA directories, using the file transfer client. ' Note: Consider using a higher-level abstraction, OPC UA file provider, instead. ' ' 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.UA Imports OpcLabs.EasyOpc.UA.AddressSpace Imports OpcLabs.EasyOpc.UA.Extensions Imports OpcLabs.EasyOpc.UA.FileTransfer Imports OpcLabs.EasyOpc.UA.OperationModel Namespace FileTransfer._EasyUAFileTransferClient Friend Class CreateDirectoryAndDelete Public Shared Sub Main1() ' Unified Automation .NET based demo server (UaNETServer/UaServerNET.exe) Dim endpointDescriptor As UAEndpointDescriptor = New UAEndpointDescriptor("opc.tcp://localhost:48030") _ .WithUserNameIdentity("john", "master") ' An object that aggregates an OPC UA file system. Dim objectDescriptor As UANodeDescriptor = "nsu=http://www.unifiedautomation.com/DemoServer/ ;s=Demo.Files" ' Create a random number generator - will be used for file/directory names. Dim random = New Random ' Instantiate the file transfer client object Dim fileTransferClient = New EasyUAFileTransferClient ' Create two directories, and one nested directory, and delete the first one. Try ' The file system node is a root directory of the file system. Console.WriteLine("Getting file system...") Dim fileSystemNodeDescriptor As UANodeDescriptor = fileTransferClient.GetFileSystem(endpointDescriptor, objectDescriptor) Dim directoryName1 As String = "MyDirectory1-" & random.Next() Console.WriteLine($"Creating first directory, '{directoryName1}'...") Dim directoryNodeId1 As UANodeId = fileTransferClient.CreateDirectory(endpointDescriptor, fileSystemNodeDescriptor, directoryName1) Console.WriteLine($"Node Id of the first directory: {directoryNodeId1}") Dim directoryName2 As String = "MyDirectory2-" & random.Next() Console.WriteLine($"Creating second directory, '{directoryName2}'...") Dim directoryNodeId2 As UANodeId = fileTransferClient.CreateDirectory(endpointDescriptor, fileSystemNodeDescriptor, directoryName2) Console.WriteLine($"Node Id of the second directory: {directoryNodeId2}") Dim nestedDirectoryName As String = "MyDirectory3-" & random.Next() Console.WriteLine($"Creating nested directory, '{nestedDirectoryName}'...") ' Note how directoryNodeId2 (a parent directory) Is passed as the 2nd argument to the CreateDirectory method. Dim nestedDirectoryNodeId As UANodeId = fileTransferClient.CreateDirectory(endpointDescriptor, directoryNodeId2, nestedDirectoryName) Console.WriteLine($"Node Id of the nested directory: {nestedDirectoryNodeId}") ' At this moment, the directory structure we have created looks Like this ' * MyDirectory1 ' * MyDirectory2 ' * * MyDirectory3 Console.WriteLine("Deleting the first directory...") fileTransferClient.DeleteDirectory(endpointDescriptor, fileSystemNodeDescriptor, directoryName1) Catch uaException As UAException Console.WriteLine("*** Failure: {0}", uaException.GetBaseException.Message) Exit Sub End Try Console.WriteLine("Finished...") End Sub End Class End Namespace
# Shows how to create and delete OPC UA directories, using the file transfer client. # Note: Consider using a higher-level abstraction, OPC UA file provider, instead. # # 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 random # Import .NET namespaces. from OpcLabs.EasyOpc.UA import * from OpcLabs.EasyOpc.UA.Extensions import * from OpcLabs.EasyOpc.UA.FileTransfer import * from OpcLabs.EasyOpc.UA.OperationModel import * # Unified Automation .NET based demo server (UaNETServer/UaServerNET.exe). endpointDescriptor = UAEndpointDescriptor('opc.tcp://localhost:48030') endpointDescriptor = UAEndpointDescriptorExtension.WithUserNameIdentity(endpointDescriptor,'john', 'master') # An object that aggregates an OPC UA file system. objectDescriptor = UANodeDescriptor('nsu=http://www.unifiedautomation.com/DemoServer/ ;s=Demo.Files') # Create a random number generator - will be used for file/directory names. random = random.Random() # Instantiate the file transfer client object. fileTransferClient = EasyUAFileTransferClient() # Prevent prompt to trust the server certificate (INSECURE, used just for smooth example flow). EasyUAClient.SharedParameters.EngineParameters.CertificateAcceptancePolicy.TrustEndpointUrlString( endpointDescriptor.UrlString) # Create two directories, and one nested directory, and delete the first one. try: # The file system node is a root directory of the file system. print('Getting file system...') fileSystemNodeDescriptor = IEasyUAFileTransferExtension.GetFileSystem(fileTransferClient, endpointDescriptor, objectDescriptor) directoryName1 = 'MyDirectory1-' + str(random.randint(0, 999_999_999)) print("Creating first directory, '", directoryName1, "'...", sep='') directoryNodeId1 = fileTransferClient.CreateDirectory(endpointDescriptor, fileSystemNodeDescriptor, directoryName1) print('Node Id of the first directory: ', directoryNodeId1, sep='') directoryName2 = 'MyDirectory2-' + str(random.randint(0, 999_999_999)) print("Creating second directory, '", directoryName2, "'...", sep='') directoryNodeId2 = fileTransferClient.CreateDirectory(endpointDescriptor, fileSystemNodeDescriptor, directoryName2) print('Node Id of the second directory: ', directoryNodeId1, sep='') nestedDirectoryName = 'MyDirectory3-' + str(random.randint(0, 999_999_999)) print("Creating nested directory, '", nestedDirectoryName, "'...", sep='') # Note how directoryNodeId2 (a parent directory) is passed as the 2nd argument to the CreateDirectory method. nestedDirectoryNodeId = fileTransferClient.CreateDirectory(endpointDescriptor, UANodeDescriptor(directoryNodeId2), nestedDirectoryName) print('Node Id of the nested directory: ', nestedDirectoryNodeId, sep='') # At this moment, the directory structure we have created looks like this: # * MyDirectory1 # * MyDirectory2 # * * MyDirectory3 print('Deleting the first directory...') IEasyUAFileTransferExtension.DeleteDirectory(fileTransferClient, endpointDescriptor, fileSystemNodeDescriptor, directoryName1) except UAException as uaException: print('*** Failure: ' + uaException.GetBaseException().Message) exit() print() print('Finished.')
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