JSON read and write values

[JonB]

@another_one
I don't know. suggest you put qDebug() statements after each line as you change the JSON to see what's going on where. The fact that you use a dialog to get a pathname from the user cannot be relevant.

QString strReply3 = (QString)file_json3.readAll(); do not use this. Use a suitable QString method.

[jsulm]

@JonB said in JSON read and write values:

do not use this. Use a suitable QString method.

@another_one @SGaist wrote that several times already, don't know why you're not lisening...

[another_one]

@JonB said in JSON read and write values:

Use a suitable QString method.

Sorry I didint undestand, what is why I still do not use what
Could you bring some example?, please

[jsulm]

@another_one You can't use C-style cast to cat a QByteArray to QString.
Use one of the from* methods like https://doc.qt.io/qt-6/qstring.html#fromLatin1-2 depending on the used encoding.

[another_one]

@jsulm
Now I undestand, sorry, I need to do readall in QbyteArray as mzimmers already recomended
Thanks to all!

[another_one]

@another_one

I did recomended changes but unfortunally it doesn help!

            QFile file_json3(QString::fromStdString("monMK.json"));
            if (!file_json3.open(QFile::ReadOnly))
            {
                qDebug() << "json didnt opened";
            }
            else
            {
                QByteArray qba3;
                QJsonParseError qjpe3;
                qba3 = file_json3.readAll();
                file_json3.close();
                QJsonDocument jsonResponse3 = QJsonDocument::fromJson(qba3, &qjpe3);
                QJsonObject jsonObject3 = jsonResponse3.object();
                jsonObject3["FILE_LOAD"] =  g_FILE_LOAD;
                jsonResponse3.setObject(jsonObject3);
                file_json3.open(QFile::WriteOnly);
                qba3 = jsonResponse3.toJson();
                file_json3.write(qba3);
                file_json3.close();
                qDebug() << qba3;
                qDebug() << "store finished";

            }

[SGaist]

@another_one said in JSON read and write values:

@another_one

            QJsonParseError qjpe3;
            qba3 = file_json3.readAll();
            file_json3.close();
            QJsonDocument jsonResponse3 = QJsonDocument::fromJson(qba3, &qjpe3);

What about checking what qjpe3 contains ?

[Christian Ehrlicher]

@SGaist said in JSON read and write values:

Why about checking what qjpe3 contains ?

And on the next line don't ignore qjpe3. Doing basically no error checking and the onwdering why it does not work...

[another_one]

@Christian-Ehrlicher

Thanks to all!, At last I found an error in on_open_folder_clicked()

[JonB]

@another_one And what was that error, given that you showed us the full source code of that function?

[another_one]

@JonB

Hello!

I find what reason by elimination method
And on_open_folder_clicked() become the following:

void M_m::on_open_folder_clicked()
{
           QFileDialog dialog(this);
           dialog.setFileMode(QFileDialog::Directory);
           QString nameFile2 = dialog.getOpenFileName(this, tr("load bin"),"",        tr("*.bin"));
           qDebug() << "file name at first "<< nameFile2;
           if (nameFile2.isEmpty())	
           {
            return;
			}
			else
			{
				qDebug() << "dirdir2";
				ui->lineEdit->setStyleSheet("color: green;  background-color: white");
				ui->lineEdit->setText(nameFile2);
				g_FILE_LOAD = nameFile2;

				qDebug() << QString::number((unsigned int)fls, 16);
	  
				ui->lineEdit->setStyleSheet("color: green;  background-color: white");
				ui->lineEdit->setText(nameFile2);
				qDebug() << "new g_FILE_LOAD" << g_FILE_LOAD;
		  
			 }
			fs2->setValue(3);
}