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View this topic on docs.devexpress.com (Learn more)

BaseListBoxControl.CustomizeItem Event

Allows you to dynamically customize templated items.

Namespace:DevExpress.XtraEditors
Assembly:DevExpress.XtraEditors.v19.1.dll

Expanded Syntax

Expanded Event Data

The event handler receives an argument of type CustomizeTemplatedItemEventArgs containing data related to this event.

The following CustomizeTemplatedItemEventArgs properties provide information specific to this event.
Property Description
DataItem Gets the current item's underlying data object. For a bound ListBoxControl, the DataItem property returns the corresponding record in the data source.
Index Gets the current item's visual position. For a bound ListBoxControl, this property's value matches the index of a corresponding record in the data source.
TemplatedItem Gets the template used to render the current item. Customize this template when handling the CustomizeItem event.
Value Gets the item's value.

Expanded Remarks

A ListBox control can render its items based on an item template that you can create at design time or in code with the Templates property.

The CustomizeItem event fires for each templated ListBox item that is about to be displayed. Handle this event to dynamically modify the rendering of certain items.

A template typically consists of one or more elements, each of which can display text and/or image. When handling the CustomizeItem event, you can access template elements with the e.TemplatedItem.Elements collection and modify their text, image, alignment and appearance settings.

Expanded Example

This example shows how to use the CustomizeItem event to dynamically change the visibility and appearance of item elements for a templated ListBoxControl, which is bound to a data source.

The default template that is about to be customized contains four elements.

Three elements ('CompanyName', 'Country' and 'City') are bound to existing fields in the data source, and thus obtain their values automatically. The 'countryflag' template element is not bound to any existing field in the bound data source, and thus is not auto-populated with data at runtime by default. If you run the application without additionally customizing the template, you get the following result.

This example handles the CustomizeItem event to customize individual listbox items:

  • Change elements' foreground color
  • Provide images for the 'countryflag' element
  • Hide text in specific elements

The image below demonstrates the result.

Expanded See Also

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