Visual FoxPro

Iterate over Direct Child Nodes by Index

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Demonstrates some ways to iterate over direct child nodes by index.

The input XML, available at http://www.chilkatsoft.com/data/get_child.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>

Visual FoxPro

LOCAL lnSuccess
LOCAL loXml
LOCAL loChild
LOCAL i

lnSuccess = 0

loXml = CreateObject('Chilkat.Xml')

* The sample input XML is available at http://www.chilkatsoft.com/data/get_child.xml
lnSuccess = loXml.LoadXmlFile("get_child.xml")
IF (lnSuccess <> 1) THEN
    ? loXml.LastErrorText
    RELEASE loXml
    CANCEL
ENDIF

* The NumChildren property contains the number of direct
* child nodes.  Note: The child nodes under "xyz" are NOT
* direct children of "root".  Therefore, the "root" node has
* 7 direct children
? "NumChildren = " + STR(loXml.NumChildren)

* Iterate over the direct children by index. The first child
* is at index 0.

FOR i = 0 TO loXml.NumChildren - 1
    *  access the tag and content directly by index:
    ? STR(i) + ": " + loXml.GetChildTagByIndex(i) + " : " + loXml.GetChildContentByIndex(i)

NEXT
? "-----"

* Do the same as the above loop, but get the child node
* and access the Tag and Content properties:
FOR i = 0 TO loXml.NumChildren - 1
    loChild = loXml.GetChild(i)
    ? STR(i) + ": " + loChild.Tag + " : " + loChild.Content
    RELEASE loChild
NEXT
? "-----"

* Do the same as the above loop, but instead of creating
* a new object instance for each child, call GetChild2 to
* update the object's reference instead.
FOR i = 0 TO loXml.NumChildren - 1
    * Navigate to the Nth child.  
    lnSuccess = loXml.GetChild2(i)
    ? STR(i) + ": " + loXml.Tag + " : " + loXml.Content
    * Navigate back up to the parent:
    lnSuccess = loXml.GetParent2()
NEXT
? "-----"

* Notice that the Content of the "xyz" node is empty.  This is correct.
* The "xyz" node has no Content, but 2 direct children

RELEASE loXml