@SimonSchroeder said in QByteArray to QVariantMap while conserving numerical type: In that case you need to specify some formatting to make sure the number is written out in a way that makes it clear it is floating point. I don't follow you here. How would any kind of formatting of the number at sender side make any difference to the result received at the receiver side using a JSON parser to read it which will return a "numeric"/QJsonValue::Type::Double? Other than sending it is a string type and doing the numeric conversion at receiver side, which is quite different.

I did resolve it using rapidjson instead of QJsonObject Thank you all

@Christian-Ehrlicher Ok, thank you so much :)

@Christian-Ehrlicher ahh, you are right. Good catch. http://doc.qt.io/qt-5/qjsonvalue.html#toDouble converts the QJsonValue to double if its that type(). in this case it will return defaultValue (0) so its something like QJsonValue bid1 = jsonObj.value("bid_1"); QString asStr=bid1.toString(); double n = asStr.toDouble(); qDebug() << n;

Thank you guys. What a wonderful quick responses.

@JKSH Thank you! That did clear my mind! :D QJsonDocument to array, then foreach, next object value "site" toObject and now tadaaa object.value("name").toString; Great, thanks again!

@returnx Ok. super. please mark as solved :) Final note: When you deploy, there might be more reads for full json string. The code you shown, will try to parse on each read. Make sure the code can handle that it comes in blocks and not bail out if parse fails.

Hi @LuisAbreu! I cannot confirm this. Are you sure your json file is valid? The following works for me: ============================================ Json file: { "className": "ShoppingCart", "closedOn": "Fri Mar 27 15:52:13 2015", "coupon_count": "0", "createdOn": "Fri Mar 27 15:51:09 2015", "list": [ { "_className": "Product", "discount": "0", "fromyoubeep": "1", "has_alarm": 0, "id": "5601151333457", "intendedQuantity": 0, "isReady": "1", "isUnknown": "0", "loyaltyCredit": -1, "min_age": 0, "name": "Sumo Compal Cl<C3><A1>ssico Tutti-Fruti 1lt", "userCreated": "0", "weight": "0" }, { "_className": "Product", "fromyoubeep": "0", "has_alarm": 0, "id": "", "intendedQuantity": 0, "isReady": "1", "isUnknown": "0", "userCreated": "0", "weight": "0" } ], "loyaltyCard": { "_className": "LoyaltyCard", "barcode": "2446037038353", "barcodeType": "EAN13", "discount": "0", "fromyoubeep": "1", "has_alarm": 0, "id": "2446037038353", "intendedQuantity": 0, "isReady": "1", "isUnknown": "0", "loyaltyCredit": 0, "min_age": 0, "name": "Cart<C3><A3>o Poupa Mais", "price": "0", "product_id": "-1", "quantity": "0", "quantityValidated": "0", "state": "0", "type": 1, "userCreated": "0", "weight": "0" }, "mobile_checkout": "1" } ============================================ C++ code: QFile file("/home/pw/file.json"); if (!file.open(QIODevice::ReadOnly)) { qDebug() << "file error"; return; } const QByteArray ba = file.readAll(); file.close(); QJsonParseError err; QJsonDocument doc = QJsonDocument::fromJson(ba, &err); qDebug() << err.errorString(); qDebug() << err.offset; QJsonObject sett2 = doc.object(); qDebug() << sett2.isEmpty(); QJsonObject sett3 = sett2.value(QString("loyaltyCard")).toObject(); qDebug() << sett3.isEmpty(); QJsonValue sett4 = sett3.value(QString("barcode")); qDebug() << sett4.toString(); ============================================ Cheers!