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(Unicode C) Loading and Parsing a JSON ArrayA JSON array is JSON that begins with "[" and ends with "]". For example, this is a JSON array that contains 3 JSON objects. [{"name":"jack"},{"name":"john"},{"name":"joe"}]A JSON object, however, is JSON that begins with "{" and ends with "}". For example, this JSON is an object that contains an array. {"pets":[{"name":"jack"},{"name":"john"},{"name":"joe"}]}This example shows how loading a JSON array is different than loading a JSON object.
#include <C_CkJsonArrayW.h> #include <C_CkJsonObjectW.h> void ChilkatSample(void) { const wchar_t *strJsonArray; const wchar_t *strJsonObject; HCkJsonArrayW jsonArray; int i; HCkJsonObjectW jsonObj; HCkJsonObjectW jsonObject; int numPets; strJsonArray = L"[{\"name\":\"jack\"},{\"name\":\"john\"},{\"name\":\"joe\"}]"; strJsonObject = L"{\"pets\":[{\"name\":\"jack\"},{\"name\":\"john\"},{\"name\":\"joe\"}]}"; // A JSON array must be loaded using JsonArray: jsonArray = CkJsonArrayW_Create(); CkJsonArrayW_Load(jsonArray,strJsonArray); // Examine the values: i = 0; while (i < CkJsonArrayW_getSize(jsonArray)) { jsonObj = CkJsonArrayW_ObjectAt(jsonArray,i); wprintf(L"%d: %s\n",i,CkJsonObjectW_stringOf(jsonObj,L"name")); CkJsonObjectW_Dispose(jsonObj); i = i + 1; } // Output is: // 0: jack // 1: john // 2: joe // A JSON object must be loaded using JsonObject jsonObject = CkJsonObjectW_Create(); CkJsonObjectW_Load(jsonObject,strJsonObject); // Examine the values: i = 0; numPets = CkJsonObjectW_SizeOfArray(jsonObject,L"pets"); while (i < numPets) { CkJsonObjectW_putI(jsonObject,i); wprintf(L"%d: %s\n",i,CkJsonObjectW_stringOf(jsonObject,L"pets[i].name")); i = i + 1; } // Output is: // 0: jack // 1: john // 2: joe CkJsonArrayW_Dispose(jsonArray); CkJsonObjectW_Dispose(jsonObject); } |
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