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(Unicode C) JSON: Nested ArrayHere we have a JSON object that contains nested arrays. This example demonstrates how to access the contents of the nested arrays. { "numbers" : [ ["even", 2, 4, 6, 8], ["prime", 2, 3, 5, 7, 11, 13] ] }
#include <C_CkJsonObjectW.h> #include <C_CkJsonArrayW.h> void ChilkatSample(void) { HCkJsonObjectW json; const wchar_t *jsonStr; BOOL success; HCkJsonArrayW outerArray; int numArrays; int i; HCkJsonArrayW innerArray; int numInnerItems; int j; json = CkJsonObjectW_Create(); // This is the above JSON with whitespace chars removed (SPACE, TAB, CR, and LF chars). // The presence of whitespace chars for pretty-printing makes no difference to the Load // method. jsonStr = L"{ \"numbers\" : [ [\"even\", 2, 4, 6, 8], [\"prime\", 2, 3, 5, 7, 11, 13] ] }"; success = CkJsonObjectW_Load(json,jsonStr); if (success != TRUE) { wprintf(L"%s\n",CkJsonObjectW_lastErrorText(json)); CkJsonObjectW_Dispose(json); return; } // Get the value of the "numbers" object, which is an array that contains JSON arrays. outerArray = CkJsonObjectW_ArrayOf(json,L"numbers"); if (CkJsonObjectW_getLastMethodSuccess(json) == FALSE) { wprintf(L"numbers array not found.\n"); CkJsonObjectW_Dispose(json); return; } numArrays = CkJsonArrayW_getSize(outerArray); for (i = 0; i <= numArrays - 1; i++) { innerArray = CkJsonArrayW_ArrayAt(outerArray,i); // The first item in the innerArray is a string wprintf(L"%s:\n",CkJsonArrayW_stringAt(innerArray,0)); numInnerItems = CkJsonArrayW_getSize(innerArray); for (j = 1; j <= numInnerItems - 1; j++) { wprintf(L" %d\n",CkJsonArrayW_IntAt(innerArray,j)); } CkJsonArrayW_Dispose(innerArray); } CkJsonArrayW_Dispose(outerArray); CkJsonObjectW_Dispose(json); } |
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