C++

JSON: Nested Objects

See more JSON Examples

Here we have a JSON object that contains nested JSON objects. This example demonstrates how to access the contents of the nested objects.

{
  "name": "donut",
  "image":
    {
    "fname": "donut.jpg",
    "w": 200,
    "h": 200
    },
  "thumbnail":
    {
    "fname": "donutThumb.jpg",
    "w": 32,
    "h": 32
    }
}

C++

#include <CkJsonObject.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkJsonObject json;

    // 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. 
    const char *jsonStr = "{\"name\": \"donut\",\"image\":{\"fname\": \"donut.jpg\",\"w\": 200,\"h\": 200},\"thumbnail\":{\"fname\": \"donutThumb.jpg\",\"w\": 32,\"h\": 32}}";

    success = json.Load(jsonStr);
    if (success == false) {
        std::cout << json.lastErrorText() << "\r\n";
        return;
    }

    // Get the "image" object.
    CkJsonObject imageObj;
    json.ObjectOf2("image",imageObj);

    std::cout << "image: fname=" << imageObj.stringOf("fname") << ", width=" << imageObj.IntOf("w") << ", height="
         << imageObj.IntOf("h") << "\r\n";

    // Get the "thumbnail" object.
    CkJsonObject thumbObj;
    json.ObjectOf2("thumbnail",thumbObj);

    std::cout << "thumbnail: fname=" << thumbObj.stringOf("fname") << ", width=" << thumbObj.IntOf("w") << ", height="
         << thumbObj.IntOf("h") << "\r\n";
    }