Bind Image Controls to Binary Fields in LibreOffice Base

This guide explains how to store and display images directly within a LibreOffice Base database by binding an Image Control to a binary field. You will learn how to configure your database table with the appropriate binary data type, insert an Image Control into a form, and map the control’s data property to the corresponding database field for seamless image management.

1. Configure the Table Field for Binary Data

Before creating the user interface, your database table must have a column capable of storing binary image data.

  1. Open your LibreOffice Base file (.odb).
  2. Go to the Tables section and right-click your target table, then select Edit.
  3. Add a new field (e.g., ProductImage or Photo).
  4. Set the Field Type to Image [ LONGVARBINARY ] or Binary [ VARBINARY ] (depending on your database engine; embedded HSQLDB uses Image [ LONGVARBINARY ]).
  5. Save and close the table designer.

2. Add an Image Control to Your Form

With the table properly configured, you can place an Image Control on your data entry form.

  1. Navigate to the Forms section in LibreOffice Base.
  2. Right-click the form you want to modify and choose Edit to open it in Design Mode.
  3. Ensure the Form Controls toolbar is visible (go to View > Toolbars > Form Controls if it is not).
  4. Click the Image Control icon on the toolbar.
  5. Click and drag on your form canvas to draw the image box to your preferred size.

3. Bind the Image Control to the Database Field

Link the newly created graphical control to the binary field in your table.

  1. Right-click the Image Control and select Control Properties (or simply Control…).
  2. In the Properties dialog, switch to the Data tab.
  3. Locate the Data field property.
  4. Click the dropdown menu and select the binary field you created in Step 1 (e.g., ProductImage).
  5. Close the Properties dialog.

4. Save and Test the Form

  1. Turn off Design Mode by clicking the Design Mode On/Off icon on the Form Design toolbar, or save and reopen the form in normal view.
  2. Navigate to any record.
  3. Double-click the Image Control area to open a file browser dialog.
  4. Select an image file from your computer and click Open.
  5. Save the record to commit the image directly to the database’s binary field.