C

JSON: Array of Objects

See more JSON Examples

Here 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"}
  ]
}

C

#include <C_CkJsonObject.h>
#include <C_CkJsonArray.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkJsonObject json;
    const char *jsonStr;
    HCkJsonArray employees;
    int numEmployees;
    int i;
    HCkJsonObject empObj;

    success = FALSE;

    json = CkJsonObject_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 = "{\"employees\":[{\"firstName\":\"John\", \"lastName\":\"Doe\"},{\"firstName\":\"Anna\", \"lastName\":\"Smith\"},{\"firstName\":\"Peter\",\"lastName\":\"Jones\"}]}";

    success = CkJsonObject_Load(json,jsonStr);
    if (success != TRUE) {
        printf("%s\n",CkJsonObject_lastErrorText(json));
        CkJsonObject_Dispose(json);
        return;
    }

    // Get the "employees" array.
    employees = CkJsonObject_ArrayOf(json,"employees");
    if (CkJsonObject_getLastMethodSuccess(json) == FALSE) {
        printf("employees member not found.\n");
        CkJsonObject_Dispose(json);
        return;
    }

    // Iterate over each employee, getting the JSON object at each index.
    numEmployees = CkJsonArray_getSize(employees);
    i = 0;
    while (i < numEmployees) {

        empObj = CkJsonArray_ObjectAt(employees,i);

        printf("employee[%d] = %s %s\n",i,CkJsonObject_stringOf(empObj,"firstName"),CkJsonObject_stringOf(empObj,"lastName"));
        CkJsonObject_Dispose(empObj);

        i = i + 1;
    }

    CkJsonArray_Dispose(employees);


    CkJsonObject_Dispose(json);

    }