How parse json array in qt

raj.qtdev

Hi,

I have the following json response:
@
{
"f": "from",
"d": {
"ts": 1375432006,
"md": {
"files": [
{
"fk": "UfttRaEMFQKQERsc",
"tn": "data",
"fn": "fish",
"ct": "seafood"
}
]
},
"hm": "Sent you a packet.",
"i": "327"
},
"t": "m"
}
@

I am able to parse everything else except fk, tn, fn and ct. I am using the following code for this:

@ bool isOk = false;

    QVariantMap maps = Json::parse(response, isOk).toMap();

    if(isOk)
    {
        QString from = maps["f"].toString();
        qDebug() << from;

        QVariantMap data = maps["d"].toMap();

        QString ts = data["ts"].toString();
        qDebug() << ts;

        QString ct = data["hm"].toString();
        qDebug() << ct;

        QString fk = data["i"].toString();
        qDebug() << fk;

        QVariantMap md = data["md"].toMap();
        QVariantList  list = md["files"].toList();

        foreach(QVariant var, list)
            qDebug() << var.toString();;
    }

@

Don't know what is wrong with this code. Can plz somebody point out where I am wrong in here?

Thanks a lot

dlfo

You should use QJsonDocument:
http://qt-project.org/doc/qt-5.1/qtcore/qjsondocument.html

You should get a QJsonArray from the document and work with it easily:
http://qt-project.org/doc/qt-5.1/qtcore/qjsonarray.html

raj.qtdev

Thanks but I am not using Qt's Json parser. I am using third party json code to parse the json data. You could see that in the code as well.

dlfo

It's better to use the standard way. Anyway, you can use whatever method you like, if you know it well.

leon.anavi

[quote author="dlfo" date="1375600100"]It's better to use the standard way. Anyway, you can use whatever method you like, if you know it well.[/quote]

I agree. It is always better to rely on the standard tools and API for such operations.

raj.qtdev

ok noted but can somebody plz point out what is wrong in the code?

thanks

raj.qtdev

Does anyone if there is anything wrong with this code? I can't parse all the elements out of it.

andre

One problem is that the author needs to practice some patience. Please allow at least 48 hours for people to respond, some would argue a week to be reasonable.

raj.qtdev

ok.

I got it solved myself. Actually each member inside QList<QVariant> needs to be converted into a QMap first and then separate out the key-value pairs.

Thanks guys

IamSumit

Hello raj ,

i am using Json in Application, so I need JSON parser can you tell me which parser you are using?
i am using qt 4.8 on windows 7.
compiler :- MSVC

thanks

qxoz

"QJsonDocument":http://qt-project.org/doc/qt-5/qjsondocument.html ?

IamSumit

hi qxoz,
QJsonDocument is the part of Qt 5.2

My setup is Qt4.8 and Win 7,MSVC compiler

So, Could you tell me for that ?
thanks :)

Xander84

I guess the thread author used this lib: http://qjson.sourceforge.net/
I think that is the best choice if you can't switch to Qt 5.