(MFC) Traverse Direct Children via FirstChild / NextSibling, or LastChild / PreviousSibling

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>

Downloads:

MS Windows Visual C/C++ Libraries

Linux/CentOS C/C++ Libraries

MAC OS X C/C++ Libraries

Solaris C/C++ Libraries

C++ Builder Libraries

FreeBSD C++ Libraries

HP-UX C++ Libraries

BlackBerry QNX C++ Libraries

// Needs #include <CkXml.h>

    CkString strOut;

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

    bool success;
    //  The sample input XML is available at http://www.chilkatsoft.com/data/fruit.xml
    success = xml.LoadXmlFile("fruit.xml");
    if (success != true) {
        strOut.append(xml.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  Iterate over the direct children by using FirstChild / NextSibling
    child = xml.FirstChild();
    while (!(child == 0 )) {
        strOut.append(child->tag());
        strOut.append(" : ");
        strOut.append(child->content());
        strOut.append("\r\n");
        nextSibling = child->NextSibling();
        delete child;
        child = nextSibling;
    }

    strOut.append("-----");
    strOut.append("\r\n");

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

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

    strOut.append("-----");
    strOut.append("\r\n");

    //  Iterate in reverse order using LastChild / PreviousSibling
    child = xml.LastChild();
    while (!(child == 0 )) {
        strOut.append(child->tag());
        strOut.append(" : ");
        strOut.append(child->content());
        strOut.append("\r\n");
        prevSibling = child->PreviousSibling();
        delete child;
        child = prevSibling;
    }

    strOut.append("-----");
    strOut.append("\r\n");

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

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


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());