how std::string and a Json::Value string convert, each other?

[xinsuinizhuan]

I read a json string，and convert to a Json::Value:
void xxx_json_param(const char* _jsondata, const char* _savepath)
{
Json::Value root;
Json::Reader reader;
reader.parse((const std::string)_jsondata, root);

    Json::Value applicationjson_j = root["Application"];
    //applicationjson_j  is also a json，but when i asString(), it broke 
    string applicationjson = root["Application"].asString();

}

[daudrain]

@xinsuinizhuan,

in this example, the Application json value is an object. In the case of an object or an array the asString method throws an exception and aborts the application execution. Object and Array are not convertible to string.