QuickOPC User's Guide and Reference
OpcLabs.EasyOpc.UA.Plugins.ConsoleInteraction Namespace
Inheritance Hierarchy
OpcLabs.EasyOpcUA Assembly : OpcLabs.EasyOpc.UA.Plugins.ConsoleInteraction Namespace
This namespace contains Console Interaction plugin types (for OPC UA).
Remarks

 

In This Topic

Introduction

The Console Interaction Provider uses standard console, available on most systems, for user input and output.

QuickOPC uses the Console Interaction Provider whenever the Environment.UserInteractive Property returns true, and the Windows Forms Interaction Provider does not take precedence. Note that is is also possible to use the Windows Forms Interaction in console applications  (not in .NET Standard), by referencing the EasyOpcForms assembly in the console-based project.

 

Example Interactions

The example below triggers the component to ask the user whether he/she wants to accept the server's HTTPS certificate.

// This example shows how in a console application, the user is asked to accept a server HTTPS certificate.

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

namespace UADocExamples.Interaction
{
    partial class AcceptCertificate
    {
        public static void Https()
        {
            // Do not implicitly trust any endpoint URLs. We want the user be asked explicitly.
            EasyUAClient.SharedParameters.EngineParameters.CertificateAcceptancePolicy.TrustedEndpointUrlStrings.Clear();

            // Define which server we will work with.
            UAEndpointDescriptor endpointDescriptor = "https://opcua.demo-this.com:51212/UA/SampleServer/";
            
            // Instantiate the client object.
            var client = new EasyUAClient();

            UAAttributeData attributeData;
            try
            {
                // Obtain attribute data.
                // The component automatically triggers the necessary user interaction during the first operation.
                attributeData = client.Read(endpointDescriptor, "nsu=http://test.org/UA/Data/;i=10853");
            }
            catch (UAException uaException)
            {
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message);
                return;
            }

            // Display results.
            Console.WriteLine("Value: {0}", attributeData.Value);
            Console.WriteLine("ServerTimestamp: {0}", attributeData.ServerTimestamp);
            Console.WriteLine("SourceTimestamp: {0}", attributeData.SourceTimestamp);
            Console.WriteLine("StatusCode: {0}", attributeData.StatusCode);
        }
    }
}

// This example shows how in a console application, the user is asked to accept a server HTTPS certificate.

class procedure AcceptCertificate.Https;
var
  AttributeData: _UAAttributeData;
  Client: OpcLabs_EasyOpcUA_TLB._EasyUAClient;
  ClientConfiguration: TEasyUAClientConfiguration;
  EndpointDescriptor: string;
begin
  // The configuration object allows access to static behavior.
  ClientConfiguration := TEasyUAClientConfiguration.Create(nil);
  ClientConfiguration.Connect;

  // Do not implicitly trust any endpoint URLs. We want the user be asked explicitly.
  ClientConfiguration.SharedParameters.EngineParameters.CertificateAcceptancePolicy.TrustedEndpointUrlStrings.Clear();

  // Define which server we will work with.
  EndpointDescriptor := 'https://opcua.demo-this.com:51212/UA/SampleServer/';

  // Instantiate the client object.
  Client := CoEasyUAClient.Create;
  try
    // Obtain attribute data.
    // The component automatically triggers the necessary user interaction during the first operation.
    AttributeData := Client.Read(EndpointDescriptor, 'nsu=http://test.org/UA/Data/;i=10853');
  except
    on E: EOleException do
    begin
      WriteLn(Format('*** Failure: %s', [E.GetBaseException.Message]));
      Exit;
    end;
  end;

  // Display results.
  WriteLn('Value: ', AttributeData.Value);
  WriteLn('ServerTimestamp: ', DateTimeToStr(AttributeData.ServerTimestamp));
  WriteLn('SourceTimestamp: ', DateTimeToStr(AttributeData.SourceTimestamp));
  WriteLn('StatusCode: ', AttributeData.StatusCode.ToString);

  FreeAndNil(ClientConfiguration);
end;

' This example shows how in a console application, the user is asked to accept a server HTTPS certificate.

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

Namespace UADocExamples.Interaction
    Partial Friend Class AcceptCertificate
        Public Shared Sub Https()

            ' Do not implicitly trust any endpoint URLs. We want the user be asked explicitly.
            EasyUAClient.SharedParameters.EngineParameters.CertificateAcceptancePolicy.TrustedEndpointUrlStrings.Clear()

            ' Define which server we will work with.
            Dim endpointDescriptor As UAEndpointDescriptor = "https://opcua.demo-this.com:51212/UA/SampleServer/"

            ' Instantiate the client object.
            Dim client = New EasyUAClient()

            Dim attributeData As UAAttributeData
            Try
                ' Obtain attribute data.
                ' The component automatically triggers the necessary user interaction during the first operation.
                attributeData = client.Read(endpointDescriptor, "nsu=http://test.org/UA/Data/;i=10853")
            Catch uaException As UAException
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException.Message)
                Exit Sub
            End Try

            ' Display results.
            Console.WriteLine("Value: {0}", attributeData.Value)
            Console.WriteLine("ServerTimestamp: {0}", attributeData.ServerTimestamp)
            Console.WriteLine("SourceTimestamp: {0}", attributeData.SourceTimestamp)
            Console.WriteLine("StatusCode: {0}", attributeData.StatusCode)
        End Sub
    End Class
End Namespace

 

The program output may look like this:

Console - Accept HTTPS certificate

Console - Accept HTTPS certificate

 

 

 

The example below triggers the component to ask the user whether he/she wants to accept the server's instance certificate.

// This example shows how in a console application, the user is asked to accept a server instance certificate.

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

namespace UADocExamples.Interaction
{
    partial class AcceptCertificate
    {
        public static void Instance()
        {
            // Do not implicitly trust any endpoint URLs. We want the user be asked explicitly.
            EasyUAClient.SharedParameters.EngineParameters.CertificateAcceptancePolicy.TrustedEndpointUrlStrings.Clear();

            // Define which server we will work with.
            UAEndpointDescriptor endpointDescriptor = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer";
            // Require secure connection, in order to enforce the certificate check.
            endpointDescriptor.EndpointSelectionPolicy = UAMessageSecurityModes.Secure;
            
            // Instantiate the client object.
            var client = new EasyUAClient();

            UAAttributeData attributeData;
            try
            {
                // Obtain attribute data.
                // The component automatically triggers the necessary user interaction during the first operation.
                attributeData = client.Read(endpointDescriptor, "nsu=http://test.org/UA/Data/;i=10853");
            }
            catch (UAException uaException)
            {
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message);
                return;
            }

            // Display results.
            Console.WriteLine("Value: {0}", attributeData.Value);
            Console.WriteLine("ServerTimestamp: {0}", attributeData.ServerTimestamp);
            Console.WriteLine("SourceTimestamp: {0}", attributeData.SourceTimestamp);
            Console.WriteLine("StatusCode: {0}", attributeData.StatusCode);
        }
    }
}

// This example shows how in a console application, the user is asked to accept a server instance certificate.

class procedure AcceptCertificate.Instance;
var
  Arguments: OleVariant;
  AttributeData: _UAAttributeData;
  Client: OpcLabs_EasyOpcUA_TLB._EasyUAClient;
  ClientConfiguration: TEasyUAClientConfiguration;
  EndpointSelectionPolicy: _UAEndpointSelectionPolicy;
  ReadArguments: _UAReadArguments;
  Result: _UAAttributeDataResult;
  Results: OleVariant;
begin
  // The configuration object allows access to static behavior.
  ClientConfiguration := TEasyUAClientConfiguration.Create(nil);
  ClientConfiguration.Connect;

  // Do not implicitly trust any endpoint URLs. We want the user be asked explicitly.
  ClientConfiguration.SharedParameters.EngineParameters.CertificateAcceptancePolicy.TrustedEndpointUrlStrings.Clear();

  // Define which server we will work with.
  ReadArguments := CoUAReadArguments.Create;
  ReadArguments.EndpointDescriptor.UrlString := 'opc.tcp://opcua.demo-this.com:51210/UA/SampleServer';
  // Require secure connection, in order to enforce the certificate check.
  EndpointSelectionPolicy := CoUAEndpointSelectionPolicy.Create;
  EndpointSelectionPolicy.AllowedMessageSecurityModes := UAMessageSecurityModes_Secure;
  ReadArguments.EndpointDescriptor.EndpointSelectionPolicy := EndpointSelectionPolicy;
  ReadArguments.NodeDescriptor.NodeId.ExpandedText := 'nsu=http://test.org/UA/Data/;i=10853';

  Arguments := VarArrayCreate([0, 0], varVariant);
  Arguments[0] := ReadArguments;

  // Instantiate the client object.
  Client := CoEasyUAClient.Create;

  // Obtain attribute data.
  // The component automatically triggers the necessary user interaction during the first operation.
  TVarData(Results).VType := varArray or varVariant;
  TVarData(Results).VArray := PVarArray(Client.ReadMultiple(Arguments));

  Result := IInterface(Results[0]) as _UAAttributeDataResult;
  if Result.Succeeded then
  begin
    AttributeData := Result.AttributeData;
    // Display results.
    WriteLn('Value: ', AttributeData.Value);
    WriteLn('ServerTimestamp: ', DateTimeToStr(AttributeData.ServerTimestamp));
    WriteLn('SourceTimestamp: ', DateTimeToStr(AttributeData.SourceTimestamp));
    WriteLn('StatusCode: ', AttributeData.StatusCode.ToString);
  end
  else
    WriteLn('*** Failure: ', Result.ErrorMessageBrief);

  FreeAndNil(ClientConfiguration);
end;

' This example shows how in a console application, the user is asked to accept a server instance certificate.

Imports OpcLabs.EasyOpc.UA
Imports OpcLabs.EasyOpc.UA.Engine
Imports OpcLabs.EasyOpc.UA.OperationModel

Namespace UADocExamples.Interaction
    Partial Friend Class AcceptCertificate
        Public Shared Sub Instance()

            ' Do not implicitly trust any endpoint URLs. We want the user be asked explicitly.
            EasyUAClient.SharedParameters.EngineParameters.CertificateAcceptancePolicy.TrustedEndpointUrlStrings.Clear()

            ' Define which server we will work with.
            Dim endpointDescriptor As UAEndpointDescriptor = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer"
            ' Require secure connection, in order to enforce the certificate check.
            endpointDescriptor.EndpointSelectionPolicy = UAMessageSecurityModes.Secure

            ' Instantiate the client object.
            Dim client = New EasyUAClient()

            Dim attributeData As UAAttributeData
            Try
                ' Obtain attribute data.
                ' The component automatically triggers the necessary user interaction during the first operation.
                attributeData = client.Read(endpointDescriptor, "nsu=http://test.org/UA/Data/;i=10853")
            Catch uaException As UAException
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException.Message)
                Exit Sub
            End Try

            ' Display results.
            Console.WriteLine("Value: {0}", attributeData.Value)
            Console.WriteLine("ServerTimestamp: {0}", attributeData.ServerTimestamp)
            Console.WriteLine("SourceTimestamp: {0}", attributeData.SourceTimestamp)
            Console.WriteLine("StatusCode: {0}", attributeData.StatusCode)
        End Sub
    End Class
End Namespace

 

The program output may look like this:

Console - Accept instance certificate

Console - Accept instance certificate

 

 

The example below triggers the component to ask the user whether he/she wants to accept an instance certificate whose domain does not match the URL used to connect to the server.

// This example shows how in a console application, the user is asked to allow a server instance certificate with
// mismatched domain name.

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

namespace UADocExamples.Interaction
{
    class AllowEndpointDomain
    {
        public static void Main1()
        {
            // Define which server we will work with.
            // Note that extra '.' at the end of the domain name. For the purpose of this example, it allows us to address
            // the same domain, but cause a mismatch with what the names that are listed in the server instance certificate.
            UAEndpointDescriptor endpointDescriptor = "opc.tcp://opcua.demo-this.com.:51210/UA/SampleServer";
            
            // Instantiate the client object.
            var client = new EasyUAClient()
            {
                // Enforce the endpoint domain check.
                Isolated = true,
                IsolatedParameters = {SessionParameters = {CheckEndpointDomain = true}}
            };

            UAAttributeData attributeData;
            try
            {
                // Obtain attribute data.
                // The component automatically triggers the necessary user interaction during the first operation.
                attributeData = client.Read(endpointDescriptor, "nsu=http://test.org/UA/Data/;i=10853");
            }
            catch (UAException uaException)
            {
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message);
                return;
            }

            // Display results.
            Console.WriteLine("Value: {0}", attributeData.Value);
            Console.WriteLine("ServerTimestamp: {0}", attributeData.ServerTimestamp);
            Console.WriteLine("SourceTimestamp: {0}", attributeData.SourceTimestamp);
            Console.WriteLine("StatusCode: {0}", attributeData.StatusCode);
        }
    }
}

// This example shows how in a console application, the user is asked to allow a server instance certificate with
// mismatched domain name.

class procedure AllowEndpointDomain.Main;
var
  AttributeData: _UAAttributeData;
  Client: _EasyUAClient;
  EndpointDescriptor: string;
begin
  // Define which server we will work with.
  // Note that extra '.' at the end of the domain name. For the purpose of this example, it allows us to address
  // the same domain, but cause a mismatch with what the names that are listed in the server instance certificate.
  EndpointDescriptor := 'opc.tcp://opcua.demo-this.com.:51210/UA/SampleServer';

  // Instantiate the client object.
  Client := CoEasyUAClient.Create;
  // Enforce the endpoint domain check.
  Client.Isolated := true;
  Client.IsolatedParameters.SessionParameters.CheckEndpointDomain := true;

  try
    // Obtain attribute data.
    // The component automatically triggers the necessary user interaction during the first operation.
    AttributeData := Client.Read(EndpointDescriptor, 'nsu=http://test.org/UA/Data/;i=10853');
  except
    on E: EOleException do
    begin
      WriteLn(Format('*** Failure: %s', [E.GetBaseException.Message]));
      Exit;
    end;
  end;

  // Display results.
  WriteLn('Value: ', AttributeData.Value);
  WriteLn('ServerTimestamp: ', DateTimeToStr(AttributeData.ServerTimestamp));
  WriteLn('SourceTimestamp: ', DateTimeToStr(AttributeData.SourceTimestamp));
  WriteLn('StatusCode: ', AttributeData.StatusCode.ToString);
end;

' This example shows how in a console application, the user is asked to allow a server instance certificate with
' mismatched domain name.

Imports OpcLabs.EasyOpc.UA
Imports OpcLabs.EasyOpc.UA.OperationModel
Imports OpcLabs.EasyOpc.UA.Engine

Namespace UADocExamples.Interaction
    Friend Class AllowEndpointDomain
        Public Shared Sub Main1()

            ' Define which server we will work with.
            ' Note that extra '.' at the end of the domain name. For the purpose of this example, it allows us to address
            ' the same domain, but cause a mismatch with what the names that are listed in the server instance certificate.
            Dim endpointDescriptor As UAEndpointDescriptor = "opc.tcp://opcua.demo-this.com.:51210/UA/SampleServer"

            ' Instantiate the client object.
            Dim client = New EasyUAClient() With _
            { _
                .Isolated = True, _
                .IsolatedParameters = New EasyUAAdaptableParameters() With _
                { _
                    .SessionParameters = New UASmartSessionParameters() With _
                    { _
                        .CheckEndpointDomain = True _
                    } _
                } _
            }

            Dim attributeData As UAAttributeData
            Try
                ' Obtain attribute data.
                ' The component automatically triggers the necessary user interaction during the first operation.
                attributeData = client.Read(endpointDescriptor, "nsu=http://test.org/UA/Data/;i=10853")
            Catch uaException As UAException
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException.Message)
                Exit Sub
            End Try

            ' Display results.
            Console.WriteLine("Value: {0}", attributeData.Value)
            Console.WriteLine("ServerTimestamp: {0}", attributeData.ServerTimestamp)
            Console.WriteLine("SourceTimestamp: {0}", attributeData.SourceTimestamp)
            Console.WriteLine("StatusCode: {0}", attributeData.StatusCode)
        End Sub
    End Class
End Namespace

Rem This example shows how in a console application, the user is asked to allow a server instance certificate with
Rem mismatched domain name.

Option Explicit

' Define which server we will work with.
' Note that extra '.' at the end of the domain name. For the purpose of this example, it allows us to address
' the same domain, but cause a mismatch with what the names that are listed in the server instance certificate.
Dim endpointDescriptor: endpointDescriptor = "opc.tcp://opcua.demo-this.com.:51210/UA/SampleServer"

' Instantiate the client object.
Dim Client: Set Client = CreateObject("OpcLabs.EasyOpc.UA.EasyUAClient")
' Enforce the endpoint domain check.
Client.Isolated = True
Client.IsolatedParameters.SessionParameters.CheckEndpointDomain = True

' Obtain attribute data.
' The component automatically triggers the necessary user interaction during the first operation.
On Error Resume Next
Dim AttributeData: Set AttributeData = Client.Read(endpointDescriptor, "nsu=http://test.org/UA/Data/;i=10853")
If Err.Number <> 0 Then
    WScript.Echo "*** Failure: " & Err.Source & ": " & Err.Description
    WScript.Quit
End If
On Error Goto 0

' Display results
WScript.Echo "Value: " & AttributeData.Value
WScript.Echo "ServerTimestamp: " & AttributeData.ServerTimestamp
WScript.Echo "SourceTimestamp: " & AttributeData.SourceTimestamp
WScript.Echo "StatusCode: " & AttributeData.StatusCode

' Example output:
'
'OPC-UA Endpoint Domain Mismatch
'The effective host name in endpoint URL returned by the server does not match any of the domain names in the server certificate.
'Endpoint URL as returned by the server: opc.tcp://opcua.demo-this.com.:51210/UA/SampleServer
'The server certificate is for following domain names or IP addresses: opcua.demo-this.com
'This may be an indication of a spoofing attempt. Do you want to allow the endpoint anyway? [Y/n]: Y
'Value: -1.285897E+14
'ServerTimestamp: 11/28/2019 1:34:23 PM
'SourceTimestamp: 11/28/2019 1:34:23 PM
'StatusCode: Good

 

The program output may look like this:

Console - Allow endpoint domain

Console - Allow endpoint domain

 

 

Configuration

You can configure parameters of the Console Interaction by finding UAConsoleInteractionPluginParameters in the shared plug-ins configurations, and changing properties of the object obtained.

The example below configures the component to use uncolorized console output, and then triggers some user interaction.

// Shows how to configure the OPC UA Console Interaction plug-in by turning off the output colorization.

using System;
using System.Diagnostics;
using OpcLabs.BaseLib.Console.Interaction;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.Engine;
using OpcLabs.EasyOpc.UA.OperationModel;

namespace UADocExamples.Interaction
{
    partial class ConsoleInteraction
    {
        public static void ColorizeOutput()
        {
            // Configure the shared plug-in.

            // Find the parameters object of the plug-in.
            ConsoleInteractionParameters consoleInteractionPluginParameters =
                EasyUAClient.SharedParameters.PluginConfigurations.Find<ConsoleInteractionParameters>();
            Debug.Assert(consoleInteractionPluginParameters != null);
            // Change the parameter.
            consoleInteractionPluginParameters.ColorizeOutput = false;


            // Do not implicitly trust any endpoint URLs. We want the user be asked explicitly.
            EasyUAClient.SharedParameters.EngineParameters.CertificateAcceptancePolicy.TrustedEndpointUrlStrings.Clear();

            // Define which server we will work with.
            UAEndpointDescriptor endpointDescriptor = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer";
            // Require secure connection, in order to enforce the certificate check.
            endpointDescriptor.EndpointSelectionPolicy = new UAEndpointSelectionPolicy(UAMessageSecurityModes.Secure);
            
            // Instantiate the client object.
            var client = new EasyUAClient();

            UAAttributeData attributeData;
            try
            {
                // Obtain attribute data.
                // The component automatically triggers the necessary user interaction during the first operation.
                attributeData = client.Read(endpointDescriptor, "nsu=http://test.org/UA/Data/;i=10853");
            }
            catch (UAException uaException)
            {
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message);
                return;
            }

            // Display results.
            Console.WriteLine("Value: {0}", attributeData.Value);
            Console.WriteLine("ServerTimestamp: {0}", attributeData.ServerTimestamp);
            Console.WriteLine("SourceTimestamp: {0}", attributeData.SourceTimestamp);
            Console.WriteLine("StatusCode: {0}", attributeData.StatusCode);
        }
    }
}

// Shows how to configure the OPC UA Console Interaction plug-in by turning off the output colorization.

class procedure ConsoleInteraction.ColorizeOutput;
var
  Arguments: OleVariant;
  AttributeData: _UAAttributeData;
  Client: OpcLabs_EasyOpcUA_TLB._EasyUAClient;
  ClientConfiguration: TEasyUAClientConfiguration;
  ConsoleInteractionParameters: _ConsoleInteractionParameters;
  EndpointSelectionPolicy: _UAEndpointSelectionPolicy;
  ReadArguments: _UAReadArguments;
  Result: _UAAttributeDataResult;
  Results: OleVariant;
begin
  // Configure the shared plug-in.

  // The configuration object allows access to static behavior.
  ClientConfiguration := TEasyUAClientConfiguration.Create(nil);
  ClientConfiguration.Connect;

  // Find the parameters object of the plug-in.
  ConsoleInteractionParameters := IUnknown(ClientConfiguration.SharedParameters.PluginConfigurations.Find('OpcLabs.BaseLib.Console.Interaction.ConsoleInteractionParameters')) as _ConsoleInteractionParameters;
  // Change the parameter.
  ConsoleInteractionParameters.ColorizeOutput := False;

  // Do not implicitly trust any endpoint URLs. We want the user be asked explicitly.
  ClientConfiguration.SharedParameters.EngineParameters.CertificateAcceptancePolicy.TrustedEndpointUrlStrings.Clear();

  // Define which server we will work with.
  ReadArguments := CoUAReadArguments.Create;
  ReadArguments.EndpointDescriptor.UrlString := 'opc.tcp://opcua.demo-this.com:51210/UA/SampleServer';
  // Require secure connection, in order to enforce the certificate check.
  EndpointSelectionPolicy := CoUAEndpointSelectionPolicy.Create;
  EndpointSelectionPolicy.AllowedMessageSecurityModes := UAMessageSecurityModes_Secure;
  ReadArguments.EndpointDescriptor.EndpointSelectionPolicy := EndpointSelectionPolicy;
  ReadArguments.NodeDescriptor.NodeId.ExpandedText := 'nsu=http://test.org/UA/Data/;i=10853';

  Arguments := VarArrayCreate([0, 0], varVariant);
  Arguments[0] := ReadArguments;

  // Instantiate the client object.
  Client := CoEasyUAClient.Create;

  // Obtain attribute data.
  // The component automatically triggers the necessary user interaction during the first operation.
  TVarData(Results).VType := varArray or varVariant;
  TVarData(Results).VArray := PVarArray(Client.ReadMultiple(Arguments));

  Result := IInterface(Results[0]) as _UAAttributeDataResult;
  if Result.Succeeded then
  begin
    AttributeData := Result.AttributeData;
    // Display results.
    WriteLn('Value: ', AttributeData.Value);
    WriteLn('ServerTimestamp: ', DateTimeToStr(AttributeData.ServerTimestamp));
    WriteLn('SourceTimestamp: ', DateTimeToStr(AttributeData.SourceTimestamp));
    WriteLn('StatusCode: ', AttributeData.StatusCode.ToString);
  end
  else
    WriteLn('*** Failure: ', Result.ErrorMessageBrief);

  FreeAndNil(ClientConfiguration);
end;

' Shows how to configure the OPC UA Console Interaction plug-in by turning off the output colorization.

Imports OpcLabs.BaseLib.Console.Interaction
Imports OpcLabs.EasyOpc.UA
Imports OpcLabs.EasyOpc.UA.Engine
Imports OpcLabs.EasyOpc.UA.OperationModel

Namespace UADocExamples.Interaction
    Friend Class ConsoleInteraction
        Public Shared Sub ColorizeOutput()

            ' Configure the shared plug-in.

            ' Find the parameters object of the plug-in.
            Dim consoleInteractionPluginParameters =
                EasyUAClient.SharedParameters.PluginConfigurations.Find(Of ConsoleInteractionParameters)()
            Debug.Assert(consoleInteractionPluginParameters IsNot Nothing)
            ' Change the parameter.
            consoleInteractionPluginParameters.ColorizeOutput = False

            ' Do not implicitly trust any endpoint URLs. We want the user be asked explicitly.
            EasyUAClient.SharedParameters.EngineParameters.CertificateAcceptancePolicy.TrustedEndpointUrlStrings.Clear()

            ' Define which server we will work with.
            Dim endpointDescriptor As UAEndpointDescriptor = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer"
            ' Require secure connection, in order to enforce the certificate check.
            endpointDescriptor.EndpointSelectionPolicy = New UAEndpointSelectionPolicy(UAMessageSecurityModes.Secure)

            ' Instantiate the client object.
            Dim client = New EasyUAClient()

            Dim attributeData As UAAttributeData
            Try
                ' Obtain attribute data.
                ' The component automatically triggers the necessary user interaction during the first operation.
                attributeData = client.Read(endpointDescriptor, "nsu=http://test.org/UA/Data/;i=10853")
            Catch uaException As UAException
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException.Message)
                Exit Sub
            End Try

            ' Display results.
            Console.WriteLine("Value: {0}", attributeData.Value)
            Console.WriteLine("ServerTimestamp: {0}", attributeData.ServerTimestamp)
            Console.WriteLine("SourceTimestamp: {0}", attributeData.SourceTimestamp)
            Console.WriteLine("StatusCode: {0}", attributeData.StatusCode)
        End Sub
    End Class
End Namespace

 

The program output may look like this:

Console - Turn off output colorization

Console - Turn off output colorization

 

 

 

 

See Also

Reference

OpcLabs.EasyOpcUA Assembly

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