// Shows how to read the full contents of an OPC UA file at once, using the file provider model.
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
using System;
using System.Text;
using OpcLabs.BaseLib.Extensions.FileProviders;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.FileTransfer;
namespace UADocExamples.FileProviders._FileInfo2
{
class ReadAllBytes
{
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.
// Read in all contents from a specified file node.
byte[] bytes;
try
{
Console.WriteLine("Reading the whole file...");
bytes = fileInfo2.ReadAllBytes();
}
// Methods in the file provider model throw IOException and other exceptions, but not UAException.
catch (Exception exception)
{
Console.WriteLine($"*** Failure: {exception.GetBaseException().Message}");
return;
}
// Display result
Console.WriteLine();
// We know that the file contains text, so we convert the received data to a string. If the file contents was
// binary, you would process the data according to their format.
string text = Encoding.UTF8.GetString(bytes);
Console.WriteLine("File content:");
Console.WriteLine(text);
Console.WriteLine();
Console.WriteLine("Finished...");
}
}
}
# Shows how to read the full contents of an OPC UA file at once, 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 .
# The QuickOPC package is needed. Install it using "pip install opclabs_quickopc".
import opclabs_quickopc
# Import .NET namespaces.
from System.Text import *
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.
# Read in all contents from a specified file node.
try:
print('Reading the whole file...')
bytes = IFileInfoExtension.ReadAllBytes(fileInfo2)
# Methods in the file provider model throw IOException and other exceptions, but not UAException.
except Exception as exception:
print('*** Failure: ' + exception.GetBaseException().Message)
exit()
# Display result.
print()
# We know that the file contains text, so we convert the received data to a string. If the file contents was
# binary, you would process the data according to their format.
text = Encoding.UTF8.GetString(bytes)
print('File content:')
print(text)
print()
print('Finished.')
' Shows how to read the full contents of an OPC UA file at once, using the file provider model.
'
' Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
Imports System.Text
Imports OpcLabs.BaseLib.Extensions.FileProviders
Imports OpcLabs.EasyOpc.UA
Imports OpcLabs.EasyOpc.UA.FileTransfer
Namespace FileProviders._FileInfo2
Friend Class ReadAllBytes
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.
' Read in all contents from a specified file node.
Dim bytes As Byte()
Try
Console.WriteLine("Reading the whole file...")
bytes = fileInfo2.ReadAllBytes()
' 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
' Display result
Console.WriteLine()
' We know that the file contains text, so we convert the received data to a string. If the file contents was
' binary, you would process the data according to their format.
Dim text As String = Encoding.UTF8.GetString(bytes)
Console.WriteLine("File content:")
Console.WriteLine(text)
Console.WriteLine()
Console.WriteLine("Finished...")
End Sub
End Class
End Namespace
