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(Unicode C) Find and Delete Object from JSON ArrayDemonstrates how to find an delete an object from a JSON array of objects.
#include <C_CkJsonObjectW.h> #include <C_CkJsonArrayW.h> void ChilkatSample(void) { HCkJsonObjectW json; BOOL success; HCkJsonObjectW menu; HCkJsonArrayW catArr; int index; // This example will delete the "Pasta" category object from Menu B. // { // "menus": [ // { // "name": "Menu A", // "categories": [ // { // "name": "Kebabs", // "description": "blah blah blah" // }, // { // "name": "Burgers", // "description": "blah blah blah" // }, // { // "name": "Pasta", // "description": "blah blah blah" // }, // { // "name": "Appetizers", // "description": "blah blah blah" // } // ] // }, // { // "name": "Menu B", // "categories": [ // { // "name": "Kebabs", // "description": "blah blah blah" // }, // { // "name": "Burgers", // "description": "blah blah blah" // }, // { // "name": "Pasta", // "description": "blah blah blah" // }, // { // "name": "Appetizers", // "description": "blah blah blah" // } // ] // } // ] // } json = CkJsonObjectW_Create(); success = CkJsonObjectW_LoadFile(json,L"qa_data/json/menus.json"); if (success == FALSE) { wprintf(L"%s\n",CkJsonObjectW_lastErrorText(json)); CkJsonObjectW_Dispose(json); return; } // Find Menu B. menu = CkJsonObjectW_FindRecord(json,L"menus",L"name",L"Menu B",TRUE); // assume menu is found.. // Get the categories array, and then find the index of the "Pasta" menu category. catArr = CkJsonObjectW_ArrayOf(menu,L"categories"); // Assume it is found.. // Find the object where the name of the JSON member is "name", and the value is "Pasta" index = CkJsonArrayW_FindObject(catArr,L"name",L"Pasta",TRUE); if (index < 0) { wprintf(L"Pasta not found.\n"); } else { // Delete the "Pasta" category record from Menu B success = CkJsonArrayW_DeleteAt(catArr,index); // Assume OK.. } // Examine the JSON to see if it worked as expected.. CkJsonObjectW_putEmitCompact(json,FALSE); wprintf(L"%s\n",CkJsonObjectW_emit(json)); CkJsonArrayW_Dispose(catArr); CkJsonObjectW_Dispose(menu); CkJsonObjectW_Dispose(json); } |
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