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I have registered the opcdaauto.dll and now I am seeing another exception in the logs:

System.Runtime.InteropServices.COMException (0x800706BA): The RPC server is unavailable. (Exception from HRESULT: 0x800706BA)
at OPCAutomation.IOPCAutoServer.Connect(String ProgID, Object Node)
at GodSharp.Opc.Da.OpcAutomationClient.OnConnect()
at GodSharp.Opc.Da.OpcDaClient.Connect()
at RigCLOUDOPCDA.Reader.Program.EstablishOPCConnection(Boolean disconnect)

Please advise.

hi,
when trying to connect to an opc server I receive this exception

System.TypeLoadException: 'Could not load type 'RenewUserIdentityEventHandler' from assembly 'Opc.Ua.Client, Version=1.4.371.0,

the code is very simple, it's exactly as the example provided.

            OpcUaClientBuider buider = new OpcUaClientBuider();
            buider
                .WithEndpoint(@"opc.tcp://10.10.10.12:4840")
                .WithAnonymous()
                .WithClientId("myClientID");

            var client = await buider.BuildAsync();

my application targets .net framework 4.8

any suggestions?

thank you

When I try to connect with user and password I get a Opc.Ua.ServiceResultException with this message:
"SHA1 signed certificates are not trusted."

This is my code

`
OpcUaClientBuilder builder = new OpcUaClientBuilder()
.WithEndpoint(url)
.WithAutoAcceptUntrustedCertificate(true)
.WithAccount(user, password)
.WithEventCertificateValidationHandler(new CertificateValidationEventHandler(OnCertificateValidation))
.WithClientId(clientName);

private void OnCertificateValidation(CertificateValidator validator, CertificateValidationEventArgs e)
{
if (e.Error.StatusCode == StatusCodes.BadCertificateUntrusted)
{
e.Accept = true;
}
}
`

How can I connect to my opc with just user and passowrd?
How I can set RejectSHA1SignedCertificates to false?

Regards.

Hello GodSharpOpcDaSample!
connect to server ...

未经处理的异常: System.AggregateException: 发生一个或多个错误。 ---> System.Exception: The tag with item name 'Channel1.Device1.Bool' add failed. ---> System.Runtime.InteropServices.COMException: 异常来自 HRESULT:0xC0040007
在 OPCAutomation.OPCItems.AddItem(String ItemID, Int32 ClientHandle)
在 GodSharp.Opc.Da.OpcAutomationGroupSubscription.Add(Tag[] tags)
--- 内部异常堆栈跟踪的结尾 ---
--- 内部异常堆栈跟踪的结尾 ---
在 GodSharp.Opc.Da.OpcAutomationGroupSubscription.Add(Tag[] tags)
在 GodSharp.Opc.Da.OpcDaClient.Connect()
在 GodSharpOpcDaSample.Program.Main(String[] args)

运行环境
windows xp professional 2002 sp 3
.net framework 4.0

程序集 GodSharp.Opc.Da.OpcAutomation, Version=2021.204.23.0,

System.InvalidCastException: Unable to cast object of type 'OPCAutomation.OPCServerClass' to type 'OPCAutomation.IOPCGroups'.
at System.StubHelpers.InterfaceMarshaler.ConvertToManaged(IntPtr pUnk, IntPtr itfMT, IntPtr classMT, Int32 flags)
at OPCAutomation.OPCServerClass.get_OPCGroups()
at GodSharp.Opc.Da.OpcAutomationClient.CreateSubscription(Group group)
at GodSharp.Opc.Da.OpcDaClient.Add(Group group)
at GodSharp.Opc.Da.OpcDaClient.Connect()

I am following the code provided in the opcsample/Program.cs and I am getting the below exception. Should I register any of the com dll's using regsvr?
Please advise.

System.Runtime.InteropServices.COMException: 'Retrieving the COM class factory for component with CLSID {28E68F9A-8D75-11D1-8DC3-3C302A000000} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)).'

These are the dll's inside the bin folder:

when i use opcsample to connect my keepserverEx6.1 and I get the following error:

System.InvalidCastException:“无法将类型为“System.__ComObject”的 COM 对象强制转换为接口类型“OpcRcw.Comn.IOPCServerList2”。此操作失败的原因是对 IID 为“{9DD0B56C-AD9E-43EE-8305-487F3188BF7A}”的接口的 COM 组件调用 QueryInterface 因以下错误而失败: 拒绝访问。 (异常来自 HRESULT:0x80070005 (E_ACCESSDENIED))。”

here is my code:

my tag name:

my opcserver:

注册好DataChangedHandle后无法接收到数值变化事件

运行环境
windows xp professional 2002 sp 3
.net framework 4.0

程序集 GodSharp.Opc.Da.OpcAutomation, Version=2021.204.23.0,

System.InvalidCastException: Unable to cast object of type 'OPCAutomation.OPCServerClass' to type 'OPCAutomation.IOPCGroups'.
at System.StubHelpers.InterfaceMarshaler.ConvertToManaged(IntPtr pUnk, IntPtr itfMT, IntPtr classMT, Int32 flags)
at OPCAutomation.OPCServerClass.get_OPCGroups()
at GodSharp.Opc.Da.OpcAutomationClient.CreateSubscription(Group group)
at GodSharp.Opc.Da.OpcDaClient.Add(Group group)
at GodSharp.Opc.Da.OpcDaClient.Connect()

We are using GodSharp OPC DA to read Kepware tags and have subscribed to the data change event but we suspect data change event is not getting triggered in sequential order.

Is DataChangedOutput output.Data.Timestamp denotes the time the data actually changed in Kepware or it it the time it is received by the handler event for processing?

We also tried to disconnect and connect back but it is waiting for the disconnect and it seems like that is never happening.