A collection of host names for the application instance.
Syntax
Property Value
A collection of strings, each representing an alternate host name for the application instance.
The value of this property cannot be null
(Nothing
in Visual Basic).
The individual elements of the property value cannot be null
(Nothing
in Visual Basic).
Example
// This example shows how to specify additional host name(s) for the server. This is useful when the server is running on a
// computer that has multiple host names, and you want to make the server accessible under them.
// 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.Application;
using OpcLabs.EasyOpc.UA.Application.Extensions;
using OpcLabs.EasyOpc.UA.NodeSpace;
using OpcLabs.EasyOpc.UA.OperationModel;
namespace UAServerDocExamples._EasyUAServer
{
class AlternateHostNames
{
public static void Main1()
{
// Obtain the application interface.
EasyUAApplication application = EasyUAApplication.Instance;
// Remove the own application certificate. This assures that, when needed, the server will create a new one with
// the parameters we want and specify.
try
{
Console.WriteLine("Removing the own application certificate...");
application.RemoveOwnCertificate();
Console.WriteLine("The application certificate has been removed.");
}
catch (UAException uaException)
{
Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message);
}
// Instantiate the server object.
// By default, the server will run on endpoint URL "opc.tcp://localhost:48040/".
var server = new EasyUAServer();
// Add an alternate host name to the server (and its application certificate).
server.AlternateHostNames.Add("mycomputer.mycompany.example");
//
// 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.");
}
}
}
' This example shows how to specify additional host name(s) for the server. This is useful when the server is running on a
' computer that has multiple host names, and you want to make the server accessible under them.
' 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 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 System
Imports OpcLabs.EasyOpc.UA
Imports OpcLabs.EasyOpc.UA.Application
Imports OpcLabs.EasyOpc.UA.Application.Extensions
Imports OpcLabs.EasyOpc.UA.NodeSpace
Imports OpcLabs.EasyOpc.UA.OperationModel
Namespace _EasyUAServer
Partial Friend Class AlternateHostNames
Shared Sub Main1()
' Obtain the application interface.
Dim Application As EasyUAApplication = EasyUAApplication.Instance
' Remove the own application certificate. This assures that, when needed, the server will create a new one with
' the parameters we want and specify.
Try
Console.WriteLine("Removing the own application certificate...")
Application.RemoveOwnCertificate()
Console.WriteLine("The application certificate has been removed.")
Catch uaException As UAException
Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message)
End Try
' Instantiate the server object.
' By default, the server will run on endpoint URL "opc.tcp://localhost:48040/".
Dim server = New EasyUAServer()
' Add an alternate host name to the server (and its application certificate).
server.AlternateHostNames.Add("mycomputer.mycompany.example")
'
' Define a data variable providing random integers.
Dim random = New Random()
server.Add(New UADataVariable("MyDataVariable").ReadValueFunction(Function() 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.")
End Sub
End Class
End Namespace
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