Unicode 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>

Unicode C

#include <C_CkXmlW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkXmlW xml;
    HCkXmlW child;
    HCkXmlW nextSibling;
    HCkXmlW prevSibling;
    BOOL bContinue;

    success = FALSE;

    xml = CkXmlW_Create();

    success = CkXmlW_LoadXmlFile(xml,L"qa_data/xml/fruit.xml");
    if (success != TRUE) {
        wprintf(L"%s\n",CkXmlW_lastErrorText(xml));
        CkXmlW_Dispose(xml);
        return;
    }

    // Iterate over the direct children by using FirstChild / NextSibling
    child = CkXmlW_FirstChild(xml);
    bContinue = CkXmlW_getLastMethodSuccess(xml);
    while ((bContinue == TRUE)) {
        wprintf(L"%s : %s\n",CkXmlW_tag(child),CkXmlW_content(child));
        nextSibling = CkXmlW_NextSibling(child);
        bContinue = CkXmlW_getLastMethodSuccess(child);
        CkXmlW_Dispose(child);
        child = nextSibling;
    }

    wprintf(L"-----\n");

    // Do the same, but with FirstChild2 / NextSibling2 to avoid
    // creating so many XML object instances:
    success = CkXmlW_FirstChild2(xml);
    while (success == TRUE) {
        wprintf(L"%s : %s\n",CkXmlW_tag(xml),CkXmlW_content(xml));
        success = CkXmlW_NextSibling2(xml);
    }

    // Revert back up to the parent:
    success = CkXmlW_GetParent2(xml);

    wprintf(L"-----\n");

    // Iterate in reverse order using LastChild / PreviousSibling
    child = CkXmlW_LastChild(xml);
    bContinue = CkXmlW_getLastMethodSuccess(xml);
    while ((bContinue == TRUE)) {
        wprintf(L"%s : %s\n",CkXmlW_tag(child),CkXmlW_content(child));
        prevSibling = CkXmlW_PreviousSibling(child);
        bContinue = CkXmlW_getLastMethodSuccess(child);
        CkXmlW_Dispose(child);
        child = prevSibling;
    }

    wprintf(L"-----\n");

    // Do the same, but with LastChild2 / PreviousSibling2 to avoid
    // creating so many XML object instances:
    success = CkXmlW_LastChild2(xml);
    while (success == TRUE) {
        wprintf(L"%s : %s\n",CkXmlW_tag(xml),CkXmlW_content(xml));
        success = CkXmlW_PreviousSibling2(xml);
    }

    // Revert back up to the parent:
    success = CkXmlW_GetParent2(xml);


    CkXmlW_Dispose(xml);

    }