OPC Studio User's Guide and Reference
ConfigurationPropertyOverrides Property (_UAClientEngineParameters)
Example 



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA.Engine.ComTypes Namespace > _UAClientEngineParameters Interface : ConfigurationPropertyOverrides Property
Specifies override values for configuration properties.
Syntax
'Declaration
 
<NotNullAttribute()>
Property ConfigurationPropertyOverrides As StringObjectDictionary
'Usage
 
Dim instance As _UAClientEngineParameters
Dim value As StringObjectDictionary
 
instance.ConfigurationPropertyOverrides = value
 
value = instance.ConfigurationPropertyOverrides
[NotNull()]
StringObjectDictionary ConfigurationPropertyOverrides {get; set;}
[NotNull()]
property StringObjectDictionary^ ConfigurationPropertyOverrides {
   StringObjectDictionary^ get();
   void set (    StringObjectDictionary^ value);
}

Property Value

The value of this property cannot be null (Nothing in Visual Basic).

The individual elements of the property value can be null (Nothing in Visual Basic).

Exceptions
ExceptionDescription

A null reference (Nothing in Visual Basic) is passed to a method that does not accept it as a valid argument.

This is a usage error, i.e. it will never occur (the exception will not be thrown) in a correctly written program. Your code should not catch this exception.

Remarks

This member or type is for use from COM. It is not meant to be used from .NET or Python. Refer to the corresponding .NET member or type instead, if you are developing in .NET or Python.

Example
// This example shows how to limit the maximum number of sessions the OPC UA clients can open with the server.
// You can use any OPC UA client, including our Connectivity Explorer and OpcCmd utility, to connect to the server. 
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client, server and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-OPCStudio-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.Engine;
using OpcLabs.EasyOpc.UA.NodeSpace;

namespace UAServerDocExamples.Configuration
{
    class ServerConfiguration
    {
        public static void MaxSessionCount()
        {
            // Get the shared engine parameters object
            EasyUAServerEngineParameters engineParameters = EasyUAServer.SharedParameters.EngineParameters;

            // Set the maximum number of open session to 2.
            // This particular property is documented here:
            // https://www.opclabs.com/files/onlinedocs/UA-.NETStandard/Latest/Browser%20Help/webframe.html#Opc.Ua.Core~Opc.Ua.ServerConfiguration~MaxSessionCount.html
            engineParameters.ConfigurationPropertyOverrides["ServerConfiguration.MaxSessionCount"] = 2;
            
            // Instantiate the server object.
            // By default, the server will run on endpoint URL "opc.tcp://localhost:48040/".
            var server = new EasyUAServer();

            // Define a data variable providing random integers.
            var random = new Random();
            server.Add(new UADataVariable("MyDataVariable").ReadValueFunction(() => random.Next()));

            // Start the server.
            Console.WriteLine("The server is starting...");
            server.Start();

            Console.WriteLine("The server is started.");
            Console.WriteLine();

            // Let the user decide when to stop.
            Console.WriteLine("Press Enter to stop the server...");
            Console.ReadLine();

            // Stop the server.
            Console.WriteLine("The server is stopping...");
            server.Stop();

            Console.WriteLine("The server is stopped.");
        }
    }
}
Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows

See Also