Hi Rob,

Based on my understanding, you may need to make the
"SubmitTransactionResponse" element the root element of your webmethod's
response message and all the sub properites as its child elements ,
correct?  

I think you may need to use the "SoapDocumentMethodAttribute" to decorate
your webmethod and set the ParameterStyle (and some other attributes) to
customize the webmethod message's formatting. Here is a simple example:

[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class WebService : System.Web.Services.WebService {

   public WebService () {

       //Uncomment the following line if using designed components
       //InitializeComponent();
   }

   [WebMethod()]
   [SoapDocumentMethod(ResponseElementName="SubmitTransactionResponse",
ParameterStyle=SoapParameterStyle.Bare)]
   [return: XmlElement(ElementName="SubmitTransactionResponse")]
   public SubmitTransactionResponse HelloWorld()
   {
       SubmitTransactionResponse rep = new SubmitTransactionResponse();
       rep.SubmitTransactionResult = "result";
       rep.objAuthentication = "objA";
       rep.objTransaction = "objT";

       return rep;
   }
   
}

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

=========I changed the class to below for test========
public partial class SubmitTransactionResponse {
   
   private string submitTransactionResultField;
   
   private string objAuthenticationField;
   
   private string objTransactionField;
   
   /// <remarks/>
   public string SubmitTransactionResult {
       get {
           return this.submitTransactionResultField;
       }
       set {
           this.submitTransactionResultField = value;
       }
   }
   
   /// <remarks/>
   public string objAuthentication {
       get {
           return this.objAuthenticationField;
       }
       set {
           this.objAuthenticationField = value;
       }
   }
   
   /// <remarks/>
   public string objTransaction {
       get {
           return this.objTransactionField;
       }
       set {
           this.objTransactionField = value;
       }
   }
}

=========================

In addition, I suggest you have a look at the Contact-First concept in XML
webservice which is recommended for building webservice based on given XML
schema:

#Contract-First Service Development
http://msdn.microsoft.com/msdnmag/issues/05/05/ServiceStation/

#Techniques for Contract-First Development
http://msdn.microsoft.com/msdnmag/issues/05/06/ServiceStation/

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead



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name="objAuthentication"