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Following JSON should be read in a qt, and stored in an array as key value pairs, so I can work with these values:

json:

    {

   "datasources":[

   {"id":1,"name":"TPS Position"},

   {"id":2,"name":"TPS Timer"},

   {"id":3,"name":"Lateral G"},

   {"id":4,"name":"Longitudal G"},

   {"id":5,"name":"Z"},

   {"id":6,"name":"AFR"}

]}

I read the QT JSON savegame example, but I can't figure out how to read Key values.
This is the qt code that I have, but I don't know how to go on:

    jsonFileValue = datasourcesjson.readAll();

    datasourcesjson.close();



    QJsonDocument m_DataSourceDocument = QJsonDocument::fromJson(jsonFileValue.toUtf8());



    QJsonObject m_DataSourceObject = m_DataSourceDocument.object();



    QJsonArray m_DataSourceArray = m_DataSourceObject.value(QString("datasources")).toArray();

    qWarning() << m_DataSourceArray;

This is the output:

QJsonArray([{"id":1,"name":"TPS Position"},{"id":2,"name":"TPS Timer"},{"id":3,"name":"Lateral G"},{"id":4,"name":"Longitudal G"},{"id":5,"name":"Z"},{"id":6,"name":"AFR"}])

But how can I get this data in an array to work with in my programm like QMap for key values?

Basically, you can loop through the QJsonArray and get QJsonObject from each member. Then you can get the value by its key. QJsonObject::value() returns QJsonValue type object which can be casted in your case to QString or int.

    QJsonDocument m_DataSourceDocument = QJsonDocument::fromJson(jsonFileValue.toUtf8());



    QJsonObject m_DataSourceObject = m_DataSourceDocument.object();



    QJsonArray m_DataSourceArray = m_DataSourceObject.value(QString("datasources")).toArray();

    qWarning() << m_DataSourceArray;



    for (const auto m_DataSource : m_DataSourceArray)

    // or instead of c++11 for-loop, you can use foreach, like:

    // foreach (const QJsonValue& m_DataSource, m_DataSourceArray)

    {

        QJsonObject m_DataSourceObject = m_DataSource.toObject();

        qWarning() << "Id: "

                 << m_DataSourceObject.value("id").toInt()

                 << " and name: "

                 << m_DataSourceObject.value("name").toString();

    }

Outputs:

Id:  1  and name:  "TPS Position"

Id:  2  and name:  "TPS Timer"

Id:  3  and name:  "Lateral G"

Id:  4  and name:  "Longitudal G"

Id:  5  and name:  "Z"

Id:  6  and name:  "AFR"

If you don't want to loop through all members, you can also read a single value from array.

Following code prints 'name' value of the second member:

    qWarning() << m_DataSourceArray.at(1).toObject().value("name").toString();

Outputs:

"TPS Timer"

Hope this helps.