Closed lekhoi99 closed 3 years ago
Method calls are really hard... There appear to be two (override) versions of the Session.Call method. I examined my application code; unfortunately we are using the "other" virtual Session.Call (which is also very complicated to set up).
ResponseHeader Session.Call( RequestHeader requestHeader, CallMethodRequestCollection methodsToCall, out CallMethodResultCollection results, out DiagnosticInfoCollection diagnosticInfos);
On Mon, May 24, 2021 at 9:20 AM lekhoi99 @.***> wrote:
I want to Call Method from OPC UA Server. I followed the instructions but It doesn't work . This is my code :
/// [Step 1] // parse the object id. NodeId objectId = NodeId.Parse("ns=2;i=15108"); // get the selected method id. NodeId methodId = NodeId.Parse("ns=2;i=15057"); List<ExtensionObject> ar = new List<ExtensionObject>(); // get input arguments. UInt32 a = 1; List<Variant> inputArguments = new List<Variant> { new Variant(string.Empty, TypeInfo.Scalars.String), new Variant(a,TypeInfo.Scalars.UInt32), new Variant(string.Empty, TypeInfo.Scalars.String), new Variant(ar.ToArray(), TypeInfo.Arrays.ExtensionObject), new Variant(string.Empty, TypeInfo.Scalars.String) }; /// [Step 2] List<StatusCode> inputArgumentErrors; List<Variant> outputArguments = null; // call the method on the server. StatusCode error = _Session.Call(objectId,methodId,inputArguments,out inputArgumentErrors,out outputArguments);
It 's my Error from _Session.Call :
CS1615 Argument 4 may not be passed with the 'out' keyword CS1615 Argument 5 may not be passed with the 'out' keyword
How can I fix it ?
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I want to Call Method from OPC UA Server. I followed the instructions but It doesn't work . This is my code :
It 's my Error from _Session.Call :
How can I fix it ?