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(Unicode C) Traverse Direct Children via FirstChild / NextSibling, or LastChild / PreviousSiblingDemonstrates 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>
#include <C_CkXmlW.h> void ChilkatSample(void) { HCkXmlW xml; HCkXmlW child; HCkXmlW nextSibling; HCkXmlW prevSibling; BOOL success; BOOL bContinue; 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); } |
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