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C

Iterate JSON where Member Names are Data Values

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Demonstrates how to parse JSON where member names are not keywords, but instead are data values.

Chilkat C Downloads

C
#include <C_CkJsonObject.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkJsonObject json;
    int numMembers;
    int i;
    const char *name;
    HCkJsonObject jRecord;

    success = FALSE;

    json = CkJsonObject_Create();

    success = CkJsonObject_LoadFile(json,"qa_data/json/valuesAsNames.json");

    // Imagine we have JSON such as the following:

    // {
    //   "1680": {
    //     "entity_id": "1680",
    //     "type_id": "simple",
    //     "sku": "123"
    //   },
    //   "1701": {
    //     "entity_id": "1701",
    //     "type_id": "simple",
    //     "sku": "456"
    //   }
    // }
    // 

    // This presents a parsing problem because the member names, such as "1680"
    // are not keywords.  Instead they are data values.  We don't know what they
    // may be in advance.  

    // To solve, we iterate over the members, get the name of each, ...
    numMembers = CkJsonObject_getSize(json);

    for (i = 0; i <= numMembers - 1; i++) {

        name = CkJsonObject_nameAt(json,i);

        printf("%s:\n",name);
        jRecord = CkJsonObject_ObjectAt(json,i);

        printf("entity_id: %s\n",CkJsonObject_stringOf(jRecord,"entity_id"));
        printf("type_id: %s\n",CkJsonObject_stringOf(jRecord,"type_id"));
        printf("sku: %s\n",CkJsonObject_stringOf(jRecord,"sku"));

        CkJsonObject_Dispose(jRecord);

    }



    CkJsonObject_Dispose(json);

    }