ListBox::OnDrawItem Method (DrawItemEventArgs^)


Raises the DrawItem event.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

virtual void OnDrawItem(
	DrawItemEventArgs^ e


Type: System.Windows.Forms::DrawItemEventArgs^

A DrawItemEventArgs that contains the event data.

Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.

The OnDrawItem method also enables derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

Notes to Inheritors:

When overriding OnDrawItem in a derived class, be sure to call the base class's OnDrawItem method so that registered delegates receive the event.

The following code example demonstrates how to create owner-drawn ListBox items. The code uses the DrawMode property to specify that the items drawn are fixed sized and the DrawItem event to perform the drawing of each item into the ListBox. The example code uses the properties and methods of the DrawItemEventArgs class passed as a parameter to the event handler to draw the items. This example requires that a ListBox control called listBox1 has been added to a form and that the DrawItem event is handled by the event handler defined in the example code. The example also requires that items have been added to the ListBox with the text of "Apple", "Orange", and "Plum" in that order.

No code example is currently available or this language may not be supported.

.NET Framework
Available since 1.1
Return to top