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(Unicode C) JSON: Nested ObjectsHere we have a JSON object that contains nested JSON objects. This example demonstrates how to access the contents of the nested objects. { "name": "donut", "image": { "fname": "donut.jpg", "w": 200, "h": 200 }, "thumbnail": { "fname": "donutThumb.jpg", "w": 32, "h": 32 } }
#include <C_CkJsonObjectW.h> void ChilkatSample(void) { HCkJsonObjectW json; const wchar_t *jsonStr; BOOL success; HCkJsonObjectW imageObj; HCkJsonObjectW thumbObj; 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"{\"name\": \"donut\",\"image\":{\"fname\": \"donut.jpg\",\"w\": 200,\"h\": 200},\"thumbnail\":{\"fname\": \"donutThumb.jpg\",\"w\": 32,\"h\": 32}}"; success = CkJsonObjectW_Load(json,jsonStr); if (success != TRUE) { wprintf(L"%s\n",CkJsonObjectW_lastErrorText(json)); CkJsonObjectW_Dispose(json); return; } // Get the "image" object. imageObj = CkJsonObjectW_ObjectOf(json,L"image"); if (CkJsonObjectW_getLastMethodSuccess(json) == FALSE) { wprintf(L"image object not found.\n"); CkJsonObjectW_Dispose(json); return; } wprintf(L"image: fname=%s, width=%d, height=%d\n",CkJsonObjectW_stringOf(imageObj,L"fname"),CkJsonObjectW_IntOf(imageObj,L"w") ,CkJsonObjectW_IntOf(imageObj,L"h")); CkJsonObjectW_Dispose(imageObj); // Get the "thumbnail" object. thumbObj = CkJsonObjectW_ObjectOf(json,L"thumbnail"); if (CkJsonObjectW_getLastMethodSuccess(json) == FALSE) { wprintf(L"thumbnail object not found.\n"); CkJsonObjectW_Dispose(json); return; } wprintf(L"thumbnail: fname=%s, width=%d, height=%d\n",CkJsonObjectW_stringOf(thumbObj,L"fname"),CkJsonObjectW_IntOf(thumbObj,L"w") ,CkJsonObjectW_IntOf(thumbObj,L"h")); CkJsonObjectW_Dispose(thumbObj); CkJsonObjectW_Dispose(json); } |
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