XML replace method

Question

Hi,
I have a section of an XML which I'd like to replace.  I'm using this method however it won't work.  Although both strings (myString & mystring2) are giving the expected results, the XML (XML2) remains the same after I use the replace method.  Any ideas how I can go about this? Thanks
trace ("Relevant XML part to change: ")
    var xnList:XMLList = MovieClip(root).myXML2.*.(@label== MovieClip(root).combobox.selectedItem.label);
    var mystring2:String = xnList;
trace ("New string: ")
    myString = myString + "\u0009" + "<Section label = \"" + "\u0009 </Section>";
MovieClip(root).myXML2.replace (mystring2,myString);
    XMLString = MovieClip(root).myXML2;
    trace (XMLString);

Answer 1

Actually both arguments of replace () are strings
Well, the first argument needs to be the name of the node (or the index number of the node, or "*"), and the second argument needs to be an XML. You cannot pass an XMLList as a string
You are basically adding a child node to a node. You can do so dynamically using E4X:
var myXML2:XML = <requirements>
                    <Section label="P">
                       <Requirement_1>
                          <Name>P1</Name>
                       </Requirement_1>
                       <Requirement_2>
                          <Name>P2</Name>
                       </Requirement_2>
                    </Section>
                    <Section label="M">
                       <Requirement_1>
                          <Name>M1</Name>
                       </Requirement_1>
                       <Requirement_2>
                          <Name>M2</Name>
                       </Requirement_2>
                    </Section>
                    <Section label="C">
                       <Requirement_1>
                          <Name>C1</Name>
                       </Requirement_1>
                       <Requirement_2>
                          <Name>C2</Name>
                       </Requirement_2>
                   </Section>
                </requirements>;
var selectedLabel:String = "M";
var n:uint = myXML2.Section.(@label == selectedLabel).children().length();
var newNode:XML = new XML("<Requirement_" + (n + 1) + "><name>" + selectedLabel + (n + 1) + "</name></Requirement_" + (n + 1) + ">");
myXML2.Section.(@label == selectedLabel).children()[n] = newNode;
trace(myXML2);
Trace
<requirements>
  <Section label="P">
    <Requirement_1>
      <Name>P1</Name>
    </Requirement_1>
    <Requirement_2>
      <Name>P2</Name>
    </Requirement_2>
  </Section>
  <Section label="M">
    <Requirement_1>
      <Name>M1</Name>
    </Requirement_1>
    <Requirement_2>
      <Name>M2</Name>
    </Requirement_2>
    <Requirement_3>
      <name>M3</name>
    </Requirement_3>
  </Section>
  <Section label="C">
    <Requirement_1>
      <Name>C1</Name>
    </Requirement_1>
    <Requirement_2>
      <Name>C2</Name>
    </Requirement_2>
  </Section>
</requirements>
Kenneth Kawamoto
http://www.materiaprima.co.uk/