C++

Traverse Direct Children via FirstChild / NextSibling, or LastChild / PreviousSibling

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Demonstrates some ways to iterate over direct child nodes using the FirstChild / NextSibling and LastChild / PreviousSibling methods.

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>

C++

#include <CkXml.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkXml xml;
    CkXml *child = 0;
    CkXml *nextSibling = 0;
    CkXml *prevSibling = 0;

    success = xml.LoadXmlFile("qa_data/xml/fruit.xml");
    if (success != true) {
        std::cout << xml.lastErrorText() << "\r\n";
        return;
    }

    // Iterate over the direct children by using FirstChild / NextSibling
    child = xml.FirstChild();
    bool bContinue = xml.get_LastMethodSuccess();
    while ((bContinue == true)) {
        std::cout << child->tag() << " : " << child->content() << "\r\n";
        nextSibling = child->NextSibling();
        bContinue = child->get_LastMethodSuccess();
        delete child;
        child = nextSibling;
    }

    std::cout << "-----" << "\r\n";

    // Do the same, but with FirstChild2 / NextSibling2 to avoid
    // creating so many XML object instances:
    success = xml.FirstChild2();
    while (success == true) {
        std::cout << xml.tag() << " : " << xml.content() << "\r\n";
        success = xml.NextSibling2();
    }

    // Revert back up to the parent:
    success = xml.GetParent2();

    std::cout << "-----" << "\r\n";

    // Iterate in reverse order using LastChild / PreviousSibling
    child = xml.LastChild();
    bContinue = xml.get_LastMethodSuccess();
    while ((bContinue == true)) {
        std::cout << child->tag() << " : " << child->content() << "\r\n";
        prevSibling = child->PreviousSibling();
        bContinue = child->get_LastMethodSuccess();
        delete child;
        child = prevSibling;
    }

    std::cout << "-----" << "\r\n";

    // Do the same, but with LastChild2 / PreviousSibling2 to avoid
    // creating so many XML object instances:
    success = xml.LastChild2();
    while (success == true) {
        std::cout << xml.tag() << " : " << xml.content() << "\r\n";
        success = xml.PreviousSibling2();
    }

    // Revert back up to the parent:
    success = xml.GetParent2();
    }