VFW050 – Basic Combo Box Processing
Introduction
The combo box is a simple list component. There are a number of other list components available such as List View, Grid and Tree View.
This exercise introduces a combo box (or dropdown) by adding it directly onto a panel and then adding logic to populate it with values and position it to an entry, when necessary. As you will see in a later exercise, you will often decide to create a reusable part which supports one or more linked combo boxes. This will simplify your application coding and enable the combo box logic to be written once and re-used.
A combo box typically displays a list of descriptions (such as Department Description). However your program logic will require the associated department code. Typically the combo box has one visible column containing descriptions and a hidden column containing the associated code.
When an entry in a list component is selected, your program variables are automatically populated from the selected row.
Objective
- To enhance the Employee Details command handler (iiiVFW06) using a combo box.
To achieve this objective you will complete the following:
Step 1. Add a Combo Box to the Panel
Before You Begin
Complete exercises VFW030, VFW040 and VFW042.