Mar 2, 2015 · this is how I save my images in a PostgreSQL database: @ CREATE TABLE imagines (imagi integer NOT NULL, image bytea, CONSTRAINT imaginesx PRIMARY KEY (imagi)) @ @ QSqlQuery q; QString filename; QPixmap mypix (fileName); QByteArray baImg; QBuffer buffer(&baImg); buffer.open( QBuffer::WriteOnly ); QImage image(fileName); QPixmap::fromImage(image ...

Dec 16, 2010 · Here's a short example for saving a QImage into the database: // Converting image to byte array: QByteArray bytes; { QBuffer buffer (&bytes); buffer.open (QBuffer::WriteOnly); image.save (&buffer, "PNG"); } // Writing data into the database: QString id_string = id == -1 ?

Images (or any other binary data, from files or otherwise) can be stored in a database. One way to do it is converting the data into a QByteArray, and insert it into the database as a Binary Large OBject (BLOB).

Nov 29, 2022 · [Solved] | How To Save Or Store Images In MYSQL Database And Load From Database And Display | Qt C++### Keywords:qt c++qt c++ tutorialqt c++ projectqt c++ fu...

Apr 1, 2023 · The first slot carries creating screenshot of the screen and add it to the database, and the second slot reconstructs the image from the database, taking it from QSqlTableModel object in QTableView and placing it in QLabel in the main application window.

May 5, 2006 · I would like to save an image file (jpg,bmp...) into an sqlite database as a BLOB. What format must it be in to save it to the database? I can't find anything that converts into a ByteArray.

Apr 8, 2022 · QString filename2 = QFileDialog::getOpenFileName(this, tr("Open Image"), "/", tr("Image Files (*.png *.jpg *.bmp)")); QPixmap pixmapTarget = QPixmap(filename2); pixmapTarget = pixmapTarget.scaled(ui->candidate_2_img->width(), ui->candidate_2_img->height(), Qt::IgnoreAspectRatio , Qt::SmoothTransformation); ui->candidate_2_img->setPixmap ...

Dec 9, 2015 · I've had this problem before with a MySQL database. The way I solved this is to explicitly specify that the binding type must be raw binary data. In your case, try . query.bindValue(":image", byte, QSql::In | QSql::Binary);

Aug 28, 2015 · Accessing SQL databases from C++ applications is very simple with Qt library. Here is some short example that presents how to do it. I have chosen SQLite engine because it’s the easiest engine to set up (it requires no server, no configuration…), still it’s suitable for the most of possible applications.

This is a simple Qt Quick application (written in QML and C++) that shows how to use a SQLite3 database in your Qt application. It uses the classes from the Qt SQL module, which is part of the standard Qt library. If you are looking for an equivalent example using QWidgets rather than QML, use QtSqlExample. It provides exactly the same ...