How to create custom ComboBox control like the ComboBoxAutoComplete?

You can create the custom ComboBox control like the ComboBoxAutoComplete by using the ButtonEdit and AutoComplete controls. The following steps show how to achieve this requirement.

1. Load the ButtonEdit and AutoComplete controls, and provide DataSource support.
2. Assign the TextBoxExt control in the ButtonEdit as the AutoComplete control’s target control, so that it processes the input based on its items.
3. Display the AutoComplete popup depending upon the DropDown button selection.

The following code example demonstrates the same.

C#

VB

Note: When AutoComplete mode is set as disabled, the AutoComplete process is stopped.

Figure 1: AutoComplete popup shows matching text

Figure 2: AutoComplete popup shows on the ButtonEditExt

Sample Links:

C#: ButtonEditAutoComplete_CustomControl_C#

VB: ButtonEditAutoComplete_CustomControl_VB