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(Unicode C) JSON: Access Array ValuesDemonstrates how to access values in a JSON array.
#include <C_CkJsonObjectW.h> #include <C_CkJsonArrayW.h> void ChilkatSample(void) { HCkJsonObjectW json; const wchar_t *jsonStr; BOOL success; HCkJsonArrayW tagsArray; int arraySize; int i; const wchar_t *sValue; int iValue; json = CkJsonObjectW_Create(); jsonStr = L"{ \"id\": 1, \"name\": \"A green door\", \"tags\": [\"home\", 22, \"green\"], \"price\": 125 }"; success = CkJsonObjectW_Load(json,jsonStr); if (success != TRUE) { wprintf(L"%s\n",CkJsonObjectW_lastErrorText(json)); CkJsonObjectW_Dispose(json); return; } // Get the "tags" array, which contains "home", 22, "green" tagsArray = CkJsonObjectW_ArrayOf(json,L"tags"); if (CkJsonObjectW_getLastMethodSuccess(json) == FALSE) { wprintf(L"tags member not found.\n"); CkJsonObjectW_Dispose(json); return; } // Get the value at each array index. // Output will be: // [0] = home // [0] as integer = 0 // [1] = 22 // [1] as integer = 22 // [2] = green // [2] as integer = 0 arraySize = CkJsonArrayW_getSize(tagsArray); for (i = 0; i <= arraySize - 1; i++) { sValue = CkJsonArrayW_stringAt(tagsArray,i); wprintf(L"[%d] = %s\n",i,sValue); iValue = CkJsonArrayW_IntAt(tagsArray,i); wprintf(L"[%d] as integer = %d\n",i,iValue); } CkJsonArrayW_Dispose(tagsArray); // Note: The StringAt method returns the value as a string regardless of the type. // The IntAt method returns the value as an integer. If the value does not convert to // an integer, then 0 is returned CkJsonObjectW_Dispose(json); } |
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