Call SOAP service like this:

vNewVar:=selfVM.SoapCall('http://www.webserviceX.NET/stockquote.asmx','GetQuote','http://www.webserviceX.NET/','','','NestingWParams')

SoapCall returns the body of the soap-envelope that is returned from the called service.

SoapCalls take a action (above 'GetQuote') and set this as SOAPAction header, the action is also included in the request body.

We build the soapEnvelope for the request with code like below - if you send in a action namespace we use it accordingly

      StringBuilder soapenvelopebuilder = new StringBuilder();
      soapenvelopebuilder.Append(@"<?xml version = '1.0'  encoding='utf-8' ?>");
      soapenvelopebuilder.Append(@"<soap:Envelope xmlns:soap=""http://schemas.xmlsoap.org/soap/envelope/"" xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"">");
      soapenvelopebuilder.Append(soapheaderbuilder);
      soapenvelopebuilder.Append("  <soap:Body " + @" xmlns:nsAction=""" + actionnamespace + @""">");
      soapenvelopebuilder.Append(@"    <nsAction:" + action + ">");
      soapenvelopebuilder.Append(parametersForSoapCall);
      soapenvelopebuilder.Append(@"   </nsAction:" + action + @">");
      soapenvelopebuilder.Append("  </soap:Body>");
      soapenvelopebuilder.Append("</soap:Envelope>");

In the code above we see the parametersForSoapCall

    private StringBuilder GetParamsForSoapCall(ViewModelReferenceType vmref, string nestingWithParams)
    {
      StringBuilder parametersForSoapCall = new StringBuilder();
      if (!string.IsNullOrEmpty(nestingWithParams))
      {


        ViewModelClass vmc;
        if ((vmref.Value as ViewModel).AllViewModelClasses.TryGetValue(nestingWithParams, out vmc))
        {

          var root = (vmref.Value as ViewModel).GetOclVariableValueFromName(vmc.NameOfCurrentVariable_Ocl());
          if (root != null && root.AsObject == null && (vmref.Value as ViewModel).RootObject != null)
            root = (vmref.Value as ViewModel).RootObject.AsIObject();

          DoSoapCallParamForRoot(vmref, root, vmc, parametersForSoapCall);
        }
      }
      return parametersForSoapCall;
    }

    private void DoSoapCallParamForRoot(ViewModelReferenceType vmref, IElement root, ViewModelClass vmc, StringBuilder parametersForSoapCall)
    {
      // find potential namespace columns
      Dictionary<string, string> namespaces = new Dictionary<string, string>();
      foreach (var col in vmc.ViewModel.RootViewModelClass.Columns)
      {
        if (col.RuntimeName.StartsWith("ns") && col.ExpressionResultType != null && col.ExpressionResultType.ObjectType == typeof(string))
        {
          namespaces.Add(col.RuntimeName, EcoServiceHelper.GetEcoService<IOclService>((vmref.Value as ViewModel).EcoServiceProvider).Evaluate(root, col.Expression, (vmref.Value as ViewModel).GetIExternalVariableList()).AsObject as string);
        }
      }

      foreach (var col in vmc.Columns)
      {
        var colresult = EcoServiceHelper.GetEcoService<IOclService>((vmref.Value as ViewModel).EcoServiceProvider).Evaluate(root, col.Expression, (vmref.Value as ViewModel).GetIExternalVariableList());
        if (colresult != null)
        {
          var nsForParam = "nsAction:";
          var colnamewithoutns = col.RuntimeName;
          var nsdef = "";
          var nameparts = colnamewithoutns.Split('_');
          if (nameparts.Count() > 1)
          {
            if (namespaces.ContainsKey(nameparts[0]))
            {
              nsForParam = nameparts[0] + ":";
              colnamewithoutns = colnamewithoutns.Replace(nameparts[0] + "_", "");
              nsdef = " xmlns:" + nameparts[0] + "=" + @"""" + namespaces[nameparts[0]] + @"""";
            }
          }

          if (col.DetailAssociation != null)
          {
            // Allow for structures in input
            string paramline = "";
            StringBuilder parametersForNesting = new StringBuilder();
            DoSoapCallParamForRoot(vmref, root, col.DetailAssociation, parametersForNesting);
            paramline = "<" + nsForParam + colnamewithoutns + nsdef + ">" + parametersForNesting.ToString() + "</" + nsForParam + colnamewithoutns + ">";
            parametersForSoapCall.Append(paramline);
          }
          else
          {
            string paramline = "";
            //<SomeParam xsi:type=""xsd:integer"">12</SomeParam>
            var value = colresult.AsObject;
            if (value != null)
            {
              paramline = value.ToString();
            }
            paramline = "<" + nsForParam + colnamewithoutns + nsdef + ">" + paramline + "</" + nsForParam + colnamewithoutns + ">";
            parametersForSoapCall.Append(paramline);
          }
        }
      }
    }

special variables

ViewModel variable named vSoapDebug – when we find this in the ViewModel – we assign the complete SoapEnvelope to this prior to sending it.