(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>

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkXml.h>

void ChilkatSample(void)
    {
    CkString strOut;

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

    bool success = xml.LoadXmlFile("qa_data/xml/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();
    bool bContinue = xml.get_LastMethodSuccess();
    while ((bContinue == true)) {
        strOut.append(child->tag());
        strOut.append(" : ");
        strOut.append(child->content());
        strOut.append("\r\n");
        nextSibling = child->NextSibling();
        bContinue = child->get_LastMethodSuccess();
        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:
    success = xml.GetParent2();

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

    // Iterate in reverse order using LastChild / PreviousSibling
    child = xml.LastChild();
    bContinue = xml.get_LastMethodSuccess();
    while ((bContinue == true)) {
        strOut.append(child->tag());
        strOut.append(" : ");
        strOut.append(child->content());
        strOut.append("\r\n");
        prevSibling = child->PreviousSibling();
        bContinue = child->get_LastMethodSuccess();
        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:
    success = xml.GetParent2();


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }