OPC Studio User's Guide and Reference
SetInputArguments Method (_UACallArguments)
Example 



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OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA.OperationModel.ComTypes Namespace > _UACallArguments Interface : SetInputArguments Method
Array of input arguments to the method call. The number of arguments and their types must conform to the method's requirements.
Syntax
'Declaration
 
Sub SetInputArguments( _
   ByVal inputArguments As Object _
) 
 
'Usage
 
Dim instance As _UACallArguments
Dim inputArguments As Object
 
instance.SetInputArguments(inputArguments)

Parameters

inputArguments
Remarks
Intended for use from Visual Basic 6.0.
Example

COM

// This example shows how to call multiple methods, and pass arguments to and from them.
//
// Find all latest examples here : https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .

#include "stdafx.h"    // Includes "QuickOpc.h", and other commonly used files
#include <atlsafe.h>
#include "CallMultipleMethods.h"

namespace _EasyUAClient
{
    void CallMultipleMethods::Main()
    {
        // Initialize the COM library
        CoInitializeEx(NULL, COINIT_MULTITHREADED);
        {
            CComSafeArray<VARIANT> inputs1(11);
            inputs1.SetAt(0, _variant_t(false));
            inputs1.SetAt(1, _variant_t(1));
            inputs1.SetAt(2, _variant_t(2));
            inputs1.SetAt(3, _variant_t(3));
            inputs1.SetAt(4, _variant_t(4));
            inputs1.SetAt(5, _variant_t(5));
            inputs1.SetAt(6, _variant_t(6));
            inputs1.SetAt(7, _variant_t(7));
            inputs1.SetAt(8, _variant_t(8));
            inputs1.SetAt(9, _variant_t(9));
            inputs1.SetAt(10, _variant_t(10));

            CComSafeArray<VARIANT> typeCodes1(11);
            typeCodes1.SetAt(0, _variant_t(TypeCode_Boolean));
            typeCodes1.SetAt(1, _variant_t(TypeCode_SByte));
            typeCodes1.SetAt(2, _variant_t(TypeCode_Byte));
            typeCodes1.SetAt(3, _variant_t(TypeCode_Int16));
            typeCodes1.SetAt(4, _variant_t(TypeCode_UInt16));
            typeCodes1.SetAt(5, _variant_t(TypeCode_Int32));
            typeCodes1.SetAt(6, _variant_t(TypeCode_UInt32));
            typeCodes1.SetAt(7, _variant_t(TypeCode_Int64));
            typeCodes1.SetAt(8, _variant_t(TypeCode_UInt64));
            typeCodes1.SetAt(9, _variant_t(TypeCode_Single));
            typeCodes1.SetAt(10, _variant_t(TypeCode_Double));
            CComVariant vTypeCodes1(typeCodes1);

            _UACallArgumentsPtr CallArguments1Ptr(__uuidof(UACallArguments));
            CallArguments1Ptr->EndpointDescriptor->UrlString = 
                //L"http://opcua.demo-this.com:51211/UA/SampleServer";
                L"opc.tcp://opcua.demo-this.com:51210/UA/SampleServer";
                CallArguments1Ptr->NodeDescriptor->NodeId->ExpandedText = L"nsu=http://test.org/UA/Data/ ;i=10755";
            CallArguments1Ptr->MethodNodeDescriptor->NodeId->ExpandedText = L"nsu=http://test.org/UA/Data/ ;i=10756";
            CallArguments1Ptr->InputArguments = inputs1;
            CallArguments1Ptr->InputTypeCodes = vTypeCodes1;

            CComSafeArray<VARIANT> inputs2(12);
            inputs2.SetAt(0, _variant_t(false));
            inputs2.SetAt(1, _variant_t(1));
            inputs2.SetAt(2, _variant_t(2));
            inputs2.SetAt(3, _variant_t(3));
            inputs2.SetAt(4, _variant_t(4));
            inputs2.SetAt(5, _variant_t(5));
            inputs2.SetAt(6, _variant_t(6));
            inputs2.SetAt(7, _variant_t(7));
            inputs2.SetAt(8, _variant_t(8));
            inputs2.SetAt(9, _variant_t(9));
            inputs2.SetAt(10, _variant_t(10));
            inputs2.SetAt(11, _variant_t(L"eleven"));

            CComSafeArray<VARIANT> typeCodes2(12);
            typeCodes2.SetAt(0, _variant_t(TypeCode_Boolean));
            typeCodes2.SetAt(1, _variant_t(TypeCode_SByte));
            typeCodes2.SetAt(2, _variant_t(TypeCode_Byte));
            typeCodes2.SetAt(3, _variant_t(TypeCode_Int16));
            typeCodes2.SetAt(4, _variant_t(TypeCode_UInt16));
            typeCodes2.SetAt(5, _variant_t(TypeCode_Int32));
            typeCodes2.SetAt(6, _variant_t(TypeCode_UInt32));
            typeCodes2.SetAt(7, _variant_t(TypeCode_Int64));
            typeCodes2.SetAt(8, _variant_t(TypeCode_UInt64));
            typeCodes2.SetAt(9, _variant_t(TypeCode_Single));
            typeCodes2.SetAt(10, _variant_t(TypeCode_Double));
            typeCodes2.SetAt(11, _variant_t(TypeCode_String));
            CComVariant vTypeCodes2(typeCodes2);

            _UACallArgumentsPtr CallArguments2Ptr(__uuidof(UACallArguments));
            CallArguments2Ptr->EndpointDescriptor->UrlString = 
                //L"http://opcua.demo-this.com:51211/UA/SampleServer";
                L"opc.tcp://opcua.demo-this.com:51210/UA/SampleServer";
            CallArguments2Ptr->NodeDescriptor->NodeId->ExpandedText = L"nsu=http://test.org/UA/Data/ ;i=10755";
            CallArguments2Ptr->MethodNodeDescriptor->NodeId->ExpandedText = L"nsu=http://test.org/UA/Data/ ;i=10774";
            CallArguments2Ptr->InputArguments = inputs2;
            CallArguments2Ptr->InputTypeCodes = vTypeCodes2;

            CComSafeArray<VARIANT> arguments(2);
            arguments.SetAt(0, _variant_t((IDispatch*)CallArguments1Ptr));
            arguments.SetAt(1, _variant_t((IDispatch*)CallArguments2Ptr));
            CComVariant vArguments(arguments);

            // Instantiate the client object
            _EasyUAClientPtr ClientPtr(__uuidof(EasyUAClient));

            // Perform the operation
            CComSafeArray<VARIANT> results;
            results.Attach(ClientPtr->CallMultipleMethods(&vArguments));
    
            // Display results
            for (int i = results.GetLowerBound(); i <= results.GetUpperBound(); i++)
            {
                _tprintf(_T("\n"));
                _tprintf(_T("results(%d):\n"), i);
                _ValueArrayResultPtr ResultPtr = results[i];

                if (ResultPtr->Exception == NULL)
                {
                    CComVariant valueArray(ResultPtr->ValueArray);
                    CComSafeArray<VARIANT> outputs(valueArray.parray);
                    for (int j = outputs.GetLowerBound(); j <= outputs.GetUpperBound(); j++)
                    {
                        _variant_t output(outputs[j]);
                        _variant_t vString;
                        vString.ChangeType(VT_BSTR, &output);
                        _tprintf(_T("    outputs(d)s\n"), i, (LPCTSTR)CW2CT((_bstr_t)vString));
                    }
                }
                else
                    _tprintf(_T("*** Error: %s\n"), (LPCTSTR)CW2CT(ResultPtr->Exception->ToString));
            }
        }
         // Release all interface pointers BEFORE calling CoUninitialize()
        CoUninitialize();
    }
}
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