(C#) XML SearchForAttribute Method

Demonstrates the SearchForAttribute method.

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

<root>
    <searchRoot>
        <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>
    </searchRoot>
    <fruit color="red">strawberry</fruit>
    <fruit color="orange">peach</fruit>
</root>

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Chilkat.Xml xml = new Chilkat.Xml();
Chilkat.Xml xSearchRoot = null;
Chilkat.Xml xBeginAfter = null;
Chilkat.Xml xFound = null;

bool success = xml.LoadXmlFile("qa_data/xml/fruitSearch.xml");
if (success != true) {
    Debug.WriteLine(xml.LastErrorText);
    return;
}

// Search the sub-tree rooted at "searchRoot"
xSearchRoot = xml.FindChild("searchRoot");
if (xml.LastMethodSuccess == false) {
    Debug.WriteLine("searchRoot not found, searching from root.");
    xSearchRoot = xml.GetRoot();
}

// Search for all "fruit" nodes having a color attribute
// where the name of the color ends in "e"
xBeginAfter = xSearchRoot.GetSelf();
xFound = xSearchRoot.SearchForAttribute(xBeginAfter,"fruit","color","*e");
while ((xSearchRoot.LastMethodSuccess == true)) {

    Debug.WriteLine(xFound.Content + ": " + xFound.GetAttrValue("color"));

    xBeginAfter = xFound;
    xFound = xSearchRoot.SearchForAttribute(xBeginAfter,"fruit","color","*e");
}

// The correct output is:
// grape: purple
// blueberry: blue

Debug.WriteLine("--------------------------");

// ---------------------------------------------------------------------------------
// Now do the same, but instead use SearchForAttribute2
// which updates the internal reference of the caller instead
// of returning the found node.
Chilkat.Xml xSearch = null;

xBeginAfter = xSearchRoot.GetSelf();
xSearch = xSearchRoot.GetSelf();

success = xSearch.SearchForAttribute2(xBeginAfter,"fruit","color","*e");
while (success == true) {

    Debug.WriteLine(xSearch.Content + ": " + xSearch.GetAttrValue("color"));

    // Copy the internal references so that the next search
    // begins after the found node.
    xBeginAfter.CopyRef(xSearch);
    xSearch.CopyRef(xSearchRoot);

    success = xSearch.SearchForAttribute2(xBeginAfter,"fruit","color","*e");
}