使用OPC ua.net库在Unity3d中创建一个非常简单的OPC客户端

我在尝试使用Unity3D在.Net中实现简单客户端时遇到这些错误。这些错误在Visual Studio中：

Severity    Code    Description Project File    Line    Suppression State
Error   CS0012  The type 'X509CertificateValidator' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.ServiceModel.Primitives, Version=4.5.0.3, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. Test    C:\Users\hidethepain\Documents\opc\Assets\main.cs   27  

Severity    Code    Description Project File    Line    Suppression State
Error   CS0012  The type 'Enum' is defined in an assembly that is not referenced. You must add a reference to assembly 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'.    Test, Test.Player   C:\Users\hidethepain\Documents\opc\Assets\main.cs   18  Active

Severity    Code    Description Project File    Line    Suppression State
Error   CS0012  The type 'Task<>' is defined in an assembly that is not referenced. You must add a reference to assembly 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'.  Test, Test.Player   C:\Users\hidethepain\Documents\opc\Assets\main.cs   31  Active

Unity3D使用脚本运行时版本.Net 3.5，我将其更改为.Net 4.6，以便能够使用

这是我的密码：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;
using Opc.Ua; 
using Opc.Ua.Client;
using Opc.Ua.Configuration;

public class main : MonoBehaviour
{

    private async void Start()
    {
        Console.WriteLine("Step 1 - Create a config.");
        var config = new ApplicationConfiguration()
        {
            ApplicationName = "test-opc",
            ApplicationType = ApplicationType.Client,
            SecurityConfiguration = new SecurityConfiguration { ApplicationCertificate = new CertificateIdentifier() },
            TransportConfigurations = new TransportConfigurationCollection(),
            TransportQuotas = new TransportQuotas { OperationTimeout = 15000 },
            ClientConfiguration = new ClientConfiguration { DefaultSessionTimeout = 60000 }
        };
        await config.Validate(ApplicationType.Client);
        if (config.SecurityConfiguration.AutoAcceptUntrustedCertificates)
        {
            config.CertificateValidator.CertificateValidation += (s, e) => { e.Accept = (e.Error.StatusCode == StatusCodes.BadCertificateUntrusted); };
        }

        Console.WriteLine("Step 2 - Create a session with your server.");
        using (var session = await Session.Create(config, new ConfiguredEndpoint(null, new EndpointDescription("opc.tcp://localhost:4841")), true, "", 60000, null, null))
        {
            Console.WriteLine("Step 3 - Browse the server namespace.");
            ReferenceDescriptionCollection refs;
            byte[] cp;
            session.Browse(null, null, ObjectIds.ObjectsFolder, 0u, BrowseDirection.Forward, ReferenceTypeIds.HierarchicalReferences, true, (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, out cp, out refs);
            Console.WriteLine("DisplayName: BrowseName, NodeClass");
            foreach (var rd in refs)
            {
                Console.WriteLine(rd.DisplayName + ": " + rd.BrowseName + ", " + rd.NodeClass);
                ReferenceDescriptionCollection nextRefs;
                byte[] nextCp;
                session.Browse(null, null, ExpandedNodeId.ToNodeId(rd.NodeId, session.NamespaceUris), 0u, BrowseDirection.Forward, ReferenceTypeIds.HierarchicalReferences, true, (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, out nextCp, out nextRefs);
                foreach (var nextRd in nextRefs)
                {
                    Console.WriteLine("+ " + nextRd.DisplayName + ": " + nextRd.BrowseName + ", " + nextRd.NodeClass);
                }
            }

            Console.WriteLine("Step 4 - Create a subscription. Set a faster publishing interval if you wish.");
            var subscription = new Subscription(session.DefaultSubscription) { PublishingInterval = 1000 };

            Console.WriteLine("Step 5 - Add a list of items you wish to monitor to the subscription.");
            var list = new List<MonitoredItem> {
                new MonitoredItem(subscription.DefaultItem) { DisplayName = "aaatime", StartNodeId = "i=10004" } };
            list.ForEach(i => i.Notification += OnNotification);
            subscription.AddItems(list);

            Console.WriteLine("Step 6 - Add the subscription to the session.");
            session.AddSubscription(subscription);
            subscription.Create();

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

    private static void OnNotification(MonitoredItem item, MonitoredItemNotificationEventArgs e)
    {
        foreach (var value in item.DequeueValues())
        {
            Console.WriteLine("{0}: {1}, {2}, {3}", item.DisplayName, value.Value, value.SourceTimestamp, value.StatusCode);
        }
    }
}

使用系统集合；
使用System.Collections.Generic；
使用UnityEngine；
使用制度；
使用Opc.Ua；
使用Opc.Ua.Client；
使用Opc.Ua.Configuration；
公共课主要内容：单一行为
{
私有异步void Start（）
{
WriteLine（“步骤1-创建配置”）；
var config=新应用程序配置（）
{
ApplicationName=“测试opc”，
ApplicationType=ApplicationType.Client，
SecurityConfiguration=new SecurityConfiguration{ApplicationCertificate=new CertificateIdentifier（）}，
TransportConfigurations=新的TransportConfigurationCollection（），
TransportQuotas=新的TransportQuotas{OperationTimeout=15000}，
ClientConfiguration=new ClientConfiguration{DefaultSessionTimeout=60000}
};
等待config.Validate（ApplicationType.Client）；
if（config.SecurityConfiguration.AutoAcceptUntrustedCertificates）
{
config.CertificateValidator.CertificateValidation+=（s，e）=>{e.Accept=（e.Error.StatusCode==StatusCodes.BadCertificateUntrusted）；}；
}
WriteLine（“第2步-创建与服务器的会话”）；
使用（var session=await session.Create（配置，新配置的数据点（null，新端点描述（“opc”）。tcp://localhost:4841“”），真“”，60000，空，空）
{
WriteLine（“步骤3-浏览服务器名称空间”）；
参考描述集合参考；
字节[]cp；
session.Browse（null，null，objectId.ObjectsFolder，0u，browsedDirection.Forward，ReferenceTypeId.HierarchicalReferences，true，（uint）NodeClass.Variable |（uint）NodeClass.Object |（uint）NodeClass.Method，out cp，out refs）；
Console.WriteLine（“显示名称：BrowseName，NodeClass”）；
foreach（参考文献中的变量rd）
{
Console.WriteLine（rd.DisplayName+“：“+rd.BrowseName+”，“+rd.NodeClass）；
参考描述集合的下一步；
字节[]nextCp；
session.Browse（null，null，ExpandedNodeId.ToNodeId（rd.NodeId，session.NamespaceUris），0u，browsedDirection.Forward，referenceTypeId.HierarchicalReferences，true，（uint）NodeClass.Variable |（uint）NodeClass.Object |（uint）NodeClass.Method，out-nextCp，out-nextRefs）；
foreach（nextRefs中的var nextRd）
{
Console.WriteLine（“+”+nextRd.DisplayName+”：“+nextRd.BrowseName+”，“+nextRd.NodeClass”）；
}
}
WriteLine（“第4步-创建订阅。如果愿意，请设置更快的发布间隔。”）；
var subscription=新订阅（session.DefaultSubscription）{PublishingInterval=1000}；
WriteLine（“第5步-向订阅中添加要监视的项目列表”）；
变量列表=新列表{
新的MonitoredItem（subscription.DefaultItem）{DisplayName=“aaatime”，StartNodeId=“i=10004”}；
list.ForEach（i=>i.Notification+=OnNotification）；
订阅。附加项（列表）；
WriteLine（“步骤6-将订阅添加到会话中”）；
会话.添加订阅（订阅）；
subscription.Create（）；
Console.WriteLine（“完成客户端初始化”）；
}
}
私有静态void OnNotification（MonitoredItem项，MonitoredItemNotificationEventArgs e）
{
foreach（item.DequeueValues（）中的var值）
{
WriteLine（“{0}:{1}，{2}，{3}”，item.DisplayName，value.value，value.SourceTimestamp，value.StatusCode）；
}
}
}

代码从移植到Unity3d。 如何解决这些错误？

网站上的文档说最低要求是.NET标准2.0。
根据Unity论坛的说法，开发者只限于.NET标准版本1.4，只要他们在播放器设置中选择.NET作为脚本后端

我没有测试这个特定的库，但我认为当您切换到IL2CPP时它应该可以工作，因为它支持2.0

从2018.2版开始，Unity将.NET标记为已弃用版本，因此我认为他们今后不会大力改变这种情况，而是将重点放在IL2CPP上。
真遗憾，我喜欢.NET的短构建周期

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;
using Opc.Ua; 
using Opc.Ua.Client;
using Opc.Ua.Configuration;

public class main : MonoBehaviour
{

    private async void Start()
    {
        Console.WriteLine("Step 1 - Create a config.");
        var config = new ApplicationConfiguration()
        {
            ApplicationName = "test-opc",
            ApplicationType = ApplicationType.Client,
            SecurityConfiguration = new SecurityConfiguration { ApplicationCertificate = new CertificateIdentifier() },
            TransportConfigurations = new TransportConfigurationCollection(),
            TransportQuotas = new TransportQuotas { OperationTimeout = 15000 },
            ClientConfiguration = new ClientConfiguration { DefaultSessionTimeout = 60000 }
        };
        await config.Validate(ApplicationType.Client);
        if (config.SecurityConfiguration.AutoAcceptUntrustedCertificates)
        {
            config.CertificateValidator.CertificateValidation += (s, e) => { e.Accept = (e.Error.StatusCode == StatusCodes.BadCertificateUntrusted); };
        }

        Console.WriteLine("Step 2 - Create a session with your server.");
        using (var session = await Session.Create(config, new ConfiguredEndpoint(null, new EndpointDescription("opc.tcp://localhost:4841")), true, "", 60000, null, null))
        {
            Console.WriteLine("Step 3 - Browse the server namespace.");
            ReferenceDescriptionCollection refs;
            byte[] cp;
            session.Browse(null, null, ObjectIds.ObjectsFolder, 0u, BrowseDirection.Forward, ReferenceTypeIds.HierarchicalReferences, true, (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, out cp, out refs);
            Console.WriteLine("DisplayName: BrowseName, NodeClass");
            foreach (var rd in refs)
            {
                Console.WriteLine(rd.DisplayName + ": " + rd.BrowseName + ", " + rd.NodeClass);
                ReferenceDescriptionCollection nextRefs;
                byte[] nextCp;
                session.Browse(null, null, ExpandedNodeId.ToNodeId(rd.NodeId, session.NamespaceUris), 0u, BrowseDirection.Forward, ReferenceTypeIds.HierarchicalReferences, true, (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, out nextCp, out nextRefs);
                foreach (var nextRd in nextRefs)
                {
                    Console.WriteLine("+ " + nextRd.DisplayName + ": " + nextRd.BrowseName + ", " + nextRd.NodeClass);
                }
            }

            Console.WriteLine("Step 4 - Create a subscription. Set a faster publishing interval if you wish.");
            var subscription = new Subscription(session.DefaultSubscription) { PublishingInterval = 1000 };

            Console.WriteLine("Step 5 - Add a list of items you wish to monitor to the subscription.");
            var list = new List<MonitoredItem> {
                new MonitoredItem(subscription.DefaultItem) { DisplayName = "aaatime", StartNodeId = "i=10004" } };
            list.ForEach(i => i.Notification += OnNotification);
            subscription.AddItems(list);

            Console.WriteLine("Step 6 - Add the subscription to the session.");
            session.AddSubscription(subscription);
            subscription.Create();

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

    private static void OnNotification(MonitoredItem item, MonitoredItemNotificationEventArgs e)
    {
        foreach (var value in item.DequeueValues())
        {
            Console.WriteLine("{0}: {1}, {2}, {3}", item.DisplayName, value.Value, value.SourceTimestamp, value.StatusCode);
        }
    }
}