Examples - OPC UA File Transfer - Get file properties

The example below shows how to get OPC UA file properties (such as its size or writable status), using the file transfer client.

// Shows how to get OPC UA file properties (such as its size or writable status), using the file transfer client.
// Note: Consider using a higher-level abstraction, OPC UA file provider, instead.

using System;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.FileTransfer;
using OpcLabs.EasyOpc.UA.OperationModel;

namespace UADocExamples.FileTransfer._EasyUAFileTransferClient
{
    class GetFileProperties
    {
        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();

            // Get properties of a specified file.
            UAFileProperties fileProperties;
            Console.WriteLine("Getting file properties...");
            try
            {
                fileProperties = fileTransferClient.GetFileProperties(endpointDescriptor, fileNodeDescriptor);
            }
            catch (UAException uaException)
            {
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message);
                return;
            }

            // Display result
            Console.WriteLine();
            Console.WriteLine($"MimeType: {fileProperties.MimeType}");
            Console.WriteLine($"OpenCount: {fileProperties.OpenCount}");
            Console.WriteLine($"Size: {fileProperties.Size}");
            Console.WriteLine($"UserWritable: {fileProperties.UserWritable}");
            Console.WriteLine($"Writable: {fileProperties.Writable}");
            Console.WriteLine($"Timestamp: {fileProperties.Timestamp}");

            Console.WriteLine();
            Console.WriteLine("Finished...");
        }
    }
}

# Shows how to get OPC UA file properties (such as its size or writable status), using the file transfer client.
# Note: Consider using a higher-level abstraction, OPC UA file provider, instead.

# The QuickOPC package is needed. Install it using "pip install opclabs_quickopc".
import opclabs_quickopc

# Import .NET namespaces.
from OpcLabs.EasyOpc.UA 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')

# 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()

# Get properties of a specified file.
try:
    print('Getting file properties...')
    fileProperties = IEasyUAFileTransferExtension.GetFileProperties(fileTransferClient,
                                                                    endpointDescriptor, fileNodeDescriptor)
except UAException as uaException:
    print('*** Failure: ' + uaException.GetBaseException().Message)
    exit()

# Display result.
print()
print('MimeType: ', fileProperties.MimeType, sep='')
print('OpenCount: ', fileProperties.OpenCount, sep='')
print('Size: ', fileProperties.Size, sep='')
print('UserWritable: ', fileProperties.UserWritable, sep='')
print('Writable: ', fileProperties.Writable, sep='')
print('Timestamp: ', fileProperties.Timestamp, sep='')

print()
print('Finished.')

' Shows how to get OPC UA file properties (such as its size or writable status), using the file transfer client.
' Note: Consider using a higher-level abstraction, OPC UA file provider, instead.

Imports OpcLabs.EasyOpc.UA
Imports OpcLabs.EasyOpc.UA.FileTransfer
Imports OpcLabs.EasyOpc.UA.OperationModel

Namespace FileTransfer._EasyUAFileTransferClient

    Friend Class GetFileProperties

        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

            ' Get properties of a specified file.
            Dim fileProperties As UAFileProperties
            Console.WriteLine("Getting file properties...")
            Try
                fileProperties = fileTransferClient.GetFileProperties(endpointDescriptor, fileNodeDescriptor)
            Catch uaException As UAException
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException.Message)
                Exit Sub
            End Try

            ' Display result
            Console.WriteLine()
            Console.WriteLine($"MimeType: {fileProperties.MimeType}")
            Console.WriteLine($"OpenCount: {fileProperties.OpenCount}")
            Console.WriteLine($"Size: {fileProperties.Size}")
            Console.WriteLine($"UserWritable: {fileProperties.UserWritable}")
            Console.WriteLine($"Writable: {fileProperties.Writable}")
            Console.WriteLine($"Timestamp: {fileProperties.Timestamp}")

            Console.WriteLine()
            Console.WriteLine("Finished...")
        End Sub
    End Class
End Namespace

Examples - OPC UA File Providers

Examples - OPC UA File Providers - Get file properties

Conceptual

OPC UA File Transfer Client