eva/3 Application Builder • Developing eva/3 Applications • Working with Forms • Standard Beans

SComboBox

Fig. 138: SComboBox Icons

The SComboBox allows to select from more options. In a SComboBox a list of text elements can be displayed.

Example: A list of states, to serlect a state from a SComboBox.

The user can select a text or image element from the SComboBox or use the free text input. The SComboBox gets its selection data from a STableElement and saves the value in a bound column (e.g. the primary key), of the target table.

The SComboBox is only in conjunction with a STableElement meaningfull applicable. The connection to the STableElement is set in the property page Database (s. fig. 139 ).

Fig. 139: Property Page Database SComboBox

Example: The table saves state informations and contains the following values:

Land_ID	The primary key of the table
Land	The country name
Symbol	The image of the country

Fig. 140: State Table

The othet table saves person informationand contains the following columns:

Personen_ID	The primary key of the table
Person	The surname of the person
Ref_Land_ID	The foreign key

Fig. 141: Person Table

In the form the surname from the person table and the flag of the state from wich the person comes were displayed. The connection of the tables is implemented by the primary key column Land_ID and the freign key column Ref_Land_ID (s. fig. 142 ).

Fig. 142: Form SComboBox

The following settings has to be done on the property page Database in the Properties dialog (s. fig. 139 ).

Fig. 143: Configured Database Properties of the SComboBox

Standard Beans
Displaying multiple columns
SComboBox Properties