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Removing / Deleting Child Nodes from XML

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Demonstrates various methods for removing child nodes from an XML document.

The input XML, available at http://www.chilkatsoft.com/data/fruit.xml, is this:

<root>
    <fruit color="red">apple</fruit>
    <fruit color="green">pear</fruit>
    <veg color="orange">carrot</veg>
    <meat animal="cow">beef</meat>
    <xyz>
        <fruit color="blue">blueberry</fruit>
        <veg color="green">broccoli</veg>
    </xyz>
    <fruit color="purple">grape</fruit>
    <cheese color="yellow">cheddar</cheese>
</root>

AutoIt

Local $bSuccess = False

$oXml = ObjCreate("Chilkat.Xml")
Local $oXyz

;  The sample input XML is available at http://www.chilkatsoft.com/data/fruit.xml
$bSuccess = $oXml.LoadXmlFile("fruit.xml")
If ($bSuccess <> True) Then
    ConsoleWrite($oXml.LastErrorText & @CRLF)
    Exit
EndIf

;  The RemoveChild method removes (discards) all direct
;  children having the specified tag:
$oXml.RemoveChild "fruit"

;  Show the resulting XML:
ConsoleWrite("Result with all direct children having a tag equal to ""fruit"" removed:" & @CRLF)
ConsoleWrite($oXml.GetXml() & @CRLF)

;  The XML with the "fruit" direct children removed is shown below:
;  Notice that the "fruit" node beneath "xyz" was not removed.
;  This correct because it was not a direct child of the calling node.

;  <root>
;      <veg color="orange">carrot</veg>
;      <meat animal="cow">beef</meat>
;      <xyz>
;          <fruit color="blue">blueberry</fruit>
;          <veg color="green">broccoli</veg>
;      </xyz>
;      <cheese color="yellow">cheddar</cheese>
;  </root>

;  --------------------------------------------------------------------------
;  Restore the original XML:
$bSuccess = $oXml.LoadXmlFile("fruit.xml")

;  The RemoveChildWithContent method removes the child
;  having the exact content specified, regardless of the tag.  
;  For example:
$oXml.RemoveChildWithContent "pear"

;  Show the resulting XML:
ConsoleWrite("Result with the node containing ""pear"" removed:" & @CRLF)
ConsoleWrite($oXml.GetXml() & @CRLF)

;  --------------------------------------------------------------------------
;  Restore the original XML:
$bSuccess = $oXml.LoadXmlFile("fruit.xml")

;  The RemoveChildByIndex method removes the Nth direct
;  child.  Indexing begins at 0.  The "xyz" child is at index 4:
$oXml.RemoveChildByIndex 4

;  Show the resulting XML:
;  Notice that the entire "xyz" subtree is removed.
ConsoleWrite("Result with the node at index 4 removed:" & @CRLF)
ConsoleWrite($oXml.GetXml() & @CRLF)

;  --------------------------------------------------------------------------
;  Restore the original XML:
$bSuccess = $oXml.LoadXmlFile("fruit.xml")

;  Navigate to the node with tag "xyz";
$oXyz = $oXml.FindChild("xyz")

;  Remove the "xyz" subtree making it it's own XML document
;  with the "xyz" node at the root:
$oXyz.RemoveFromTree 

;  Show both XML documents:
ConsoleWrite($oXyz.GetXml() & @CRLF)
ConsoleWrite($oXml.GetXml() & @CRLF)

;  Also, the TreeId property is an integer value assigned
;  to nodes in an XML document.  All nodes belonging to
;  the same XML document will have the same TreeId.
;  Notice that the "xyz" node now has a different TreeId:
ConsoleWrite("xyz TreeId = " & $oXyz.TreeId & @CRLF)
ConsoleWrite("xml TreeId = " & $oXml.TreeId & @CRLF)