InfoPath Dev

I am looking for a way with a button click event to copy data from several fields to a new row in a repeating table row. I was hopping I did not have to identify every source field and every target field. For now, testing, I have 3 text fields. once I add values to these fields I want to cluck a button, copy these valuse and add it to a repeating table.

Can this be done? any help appreciated.

I have come up with some what of a working solution. The problem now is my first row remains blank. here is what I have:

my form structure:

myFields
 Master1
 Master2
 Master3
 Chld
   Child
      Child1
      Child2
      Child3

Master1 will set Child1 and so on.

This is the button code:

public void AddData_Clicked(object sender, ClickedEventArgs e)
        {
            XPathNavigator Master1 = MainDataSource.CreateNavigator().SelectSingleNode("/my:myFields/my:Master1", NamespaceManager);
            XPathNavigator Master2 = MainDataSource.CreateNavigator().SelectSingleNode("/my:myFields/my:Master2", NamespaceManager);
            XPathNavigator Master3 = MainDataSource.CreateNavigator().SelectSingleNode("/my:myFields/my:Master3", NamespaceManager);
            XPathNavigator Child = MainDataSource.CreateNavigator().SelectSingleNode("/my:myFields/my:Chld/my:Child", NamespaceManager);
            
            XPathNavigator navigator = MainDataSource.CreateNavigator();
            navigator.MoveToFollowing(XPathNodeType.Element);

            XPathNavigator sectionNode = navigator.SelectSingleNode("/my:myFields/my:Chld", NamespaceManager);

            string ns = sectionNode.NamespaceURI;

            XmlWriter writer = sectionNode.AppendChild();
            DeleteNil(Child);
            writer.WriteStartElement("my", "Child", ns);
            writer.WriteElementString("my", "Child1", ns, Master1.Value.ToString()); 
            writer.WriteElementString("my", "Child2", ns, Master2.Value.ToString());
            writer.WriteElementString("my", "Child3", ns, Master3.Value.ToString());
            writer.WriteEndElement();

            writer.Close();         
         }

how can I get the code to write to the first row or eliminate the first row completely?

Thanks Hilary. I was finaly able to return a solution. I am incrementing a field with each button click. So on that field change event I am removing the first row, Using a rule to hide the first row by default. So now I am trying to add a button to each row that will allow me to copy the data in that row and write it back to my Master fields. Seems I keep getting an error because of"nil".

public void AddData_Clicked(object sender, ClickedEventArgs e)
        {

            XPathNavigator Master1 = MainDataSource.CreateNavigator().SelectSingleNode("/my:myFields/my:Master1", NamespaceManager);
            XPathNavigator Master2 = MainDataSource.CreateNavigator().SelectSingleNode("/my:myFields/my:Master2", NamespaceManager);
            XPathNavigator Master3 = MainDataSource.CreateNavigator().SelectSingleNode("/my:myFields/my:Master3", NamespaceManager);
            //XPathNavigator index = MainDataSource.CreateNavigator().SelectSingleNode("/my:myFields/my:index", NamespaceManager);
           
                    XPathNavigator navigator = MainDataSource.CreateNavigator();
                    navigator.MoveToFollowing(XPathNodeType.Element);

                    XPathNavigator sectionNode = navigator.SelectSingleNode("/my:myFields/my:Chld", NamespaceManager);

                    string ns = sectionNode.NamespaceURI;

                    XmlWriter writer = sectionNode.AppendChild();
                    writer.WriteStartElement("my", "Child", ns);
                    writer.WriteElementString("my", "Child1", ns, Master1.Value.ToString()); 
                    writer.WriteElementString("my", "Child2", ns, Master2.Value.ToString());
                    writer.WriteElementString("my", "Child3", ns, Master3.Value.ToString());
                    writer.WriteElementString("my", "ChildIndex", ns, F8.Value.ToString());
                    writer.WriteEndElement();

                    //writer.Flush();
                    writer.Close();
             
        }

        public void index_Changed(object sender, XmlEventArgs e)
        {
            XPathNavigator CI = MainDataSource.CreateNavigator().SelectSingleNode("/my:myFields/my:Chld/my:Child/my:ChildIndex", NamespaceManager);
            XPathNavigator CIParent = MainDataSource.CreateNavigator().SelectSingleNode("/my:myFields/my:Chld/my:Child", NamespaceManager);
                 
            if (Convert.ToInt32(CI.Value) == 0)
            {
                CIParent.DeleteSelf();
                
            }

        }

        public void EditItem_Clicked(object sender, ClickedEventArgs e)
        {
           
            //XPathNavigator nodeToClone = e.Source;
            //nodeToClone.Clone().InsertAfter(e.Source);
            XPathNavigator Master1 = MainDataSource.CreateNavigator().SelectSingleNode("/my:myFields/my:Master1", NamespaceManager);
            XPathNavigator Master2 = MainDataSource.CreateNavigator().SelectSingleNode("/my:myFields/my:Master2", NamespaceManager);
            XPathNavigator Master3 = MainDataSource.CreateNavigator().SelectSingleNode("/my:myFields/my:Master3", NamespaceManager);
            XPathNavigator Child1 = MainDataSource.CreateNavigator().SelectSingleNode("/my:myFields/my:Child1", NamespaceManager);
            XPathNavigator Child2 = MainDataSource.CreateNavigator().SelectSingleNode("/my:myFields/my:Child2", NamespaceManager);
            XPathNavigator Child3 = MainDataSource.CreateNavigator().SelectSingleNode("/my:myFields/my:Child3", NamespaceManager);

            Master1.SetValue(Child1.Value);
            Master2.SetValue(Child2.Value);
            Master3.SetValue(Child3.Value);
       
        }

I got it! I was over complicating it. I scrapped half the code and restarted. I have one button the will add to the repeating table first row, or append additional rows. Then I added a button to the table row. Onclick I run rules to update my master with current() row data, and delete the current  row. works perfectly in client and browser.

thanks again