C

Iterate over Direct Child Nodes by Index

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Demonstrates some ways to iterate over direct child nodes by index.

The input XML, available at http://www.chilkatsoft.com/data/get_child.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 <C_CkXml.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkXml xml;
    HCkXml child;
    int i;

    success = FALSE;

    xml = CkXml_Create();

    // The sample input XML is available at http://www.chilkatsoft.com/data/get_child.xml
    success = CkXml_LoadXmlFile(xml,"get_child.xml");
    if (success != TRUE) {
        printf("%s\n",CkXml_lastErrorText(xml));
        CkXml_Dispose(xml);
        return;
    }

    // The NumChildren property contains the number of direct
    // child nodes.  Note: The child nodes under "xyz" are NOT
    // direct children of "root".  Therefore, the "root" node has
    // 7 direct children
    printf("NumChildren = %d\n",CkXml_getNumChildren(xml));

    // Iterate over the direct children by index. The first child
    // is at index 0.

    for (i = 0; i <= CkXml_getNumChildren(xml) - 1; i++) {
        //  access the tag and content directly by index:
        printf("%d: %s : %s\n",i,CkXml_getChildTagByIndex(xml,i),CkXml_getChildContentByIndex(xml,i));

    }

    printf("-----\n");

    // Do the same as the above loop, but get the child node
    // and access the Tag and Content properties:
    for (i = 0; i <= CkXml_getNumChildren(xml) - 1; i++) {
        child = CkXml_GetChild(xml,i);
        printf("%d: %s : %s\n",i,CkXml_tag(child),CkXml_content(child));
        CkXml_Dispose(child);
    }

    printf("-----\n");

    // Do the same as the above loop, but instead of creating
    // a new object instance for each child, call GetChild2 to
    // update the object's reference instead.
    for (i = 0; i <= CkXml_getNumChildren(xml) - 1; i++) {
        // Navigate to the Nth child.  
        success = CkXml_GetChild2(xml,i);
        printf("%d: %s : %s\n",i,CkXml_tag(xml),CkXml_content(xml));
        // Navigate back up to the parent:
        success = CkXml_GetParent2(xml);
    }

    printf("-----\n");

    // Notice that the Content of the "xyz" node is empty.  This is correct.
    // The "xyz" node has no Content, but 2 direct children


    CkXml_Dispose(xml);

    }