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(Unicode C) JSON: Array of ObjectsHere we have a JSON object that contains an array, where each element in the array is a JSON object. This example demonstrates how to access the objects contained within an array. { "employees":[ {"firstName":"John", "lastName":"Doe"}, {"firstName":"Anna", "lastName":"Smith"}, {"firstName":"Peter","lastName":"Jones"} ] }
#include <C_CkJsonObjectW.h> #include <C_CkJsonArrayW.h> void ChilkatSample(void) { HCkJsonObjectW json; const wchar_t *jsonStr; BOOL success; HCkJsonArrayW employees; int numEmployees; int i; HCkJsonObjectW empObj; 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"{\"employees\":[{\"firstName\":\"John\", \"lastName\":\"Doe\"},{\"firstName\":\"Anna\", \"lastName\":\"Smith\"},{\"firstName\":\"Peter\",\"lastName\":\"Jones\"}]}"; success = CkJsonObjectW_Load(json,jsonStr); if (success != TRUE) { wprintf(L"%s\n",CkJsonObjectW_lastErrorText(json)); CkJsonObjectW_Dispose(json); return; } // Get the "employees" array. employees = CkJsonObjectW_ArrayOf(json,L"employees"); if (CkJsonObjectW_getLastMethodSuccess(json) == FALSE) { wprintf(L"employees member not found.\n"); CkJsonObjectW_Dispose(json); return; } // Iterate over each employee, getting the JSON object at each index. numEmployees = CkJsonArrayW_getSize(employees); i = 0; while (i < numEmployees) { empObj = CkJsonArrayW_ObjectAt(employees,i); wprintf(L"employee[%d] = %s %s\n",i,CkJsonObjectW_stringOf(empObj,L"firstName"),CkJsonObjectW_stringOf(empObj,L"lastName")); CkJsonObjectW_Dispose(empObj); i = i + 1; } CkJsonArrayW_Dispose(employees); CkJsonObjectW_Dispose(json); } |
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