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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 <CkJsonObjectW.h> #include <CkJsonArrayW.h> void ChilkatSample(void) { // 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" // } // ] // } // ] // } CkJsonObjectW json; bool success = json.LoadFile(L"qa_data/json/menus.json"); if (success == false) { wprintf(L"%s\n",json.lastErrorText()); return; } // Find Menu B. CkJsonObjectW *menu = json.FindRecord(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. CkJsonArrayW *catArr = menu->ArrayOf(L"categories"); // Assume it is found.. // Find the object where the name of the JSON member is "name", and the value is "Pasta" int index = catArr->FindObject(L"name",L"Pasta",true); if (index < 0) { wprintf(L"Pasta not found.\n"); } else { // Delete the "Pasta" category record from Menu B success = catArr->DeleteAt(index); // Assume OK.. } // Examine the JSON to see if it worked as expected.. json.put_EmitCompact(false); wprintf(L"%s\n",json.emit()); delete catArr; delete menu; } |
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