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ListBox.OnPreRender Method

Configures the ListBox control prior to rendering on the client.

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

protected internal override void OnPreRender(
	EventArgs e


Type: System.EventArgs

An EventArgs object that contains the event data.

The OnPreRender method is used primarily by control developers, when deriving a custom control from the ListBox class. The OnPreRender method allows derived classes to handle the PreRender event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

The OnPreRender method performs any necessary prerendering steps prior to saving view state and rendering content for the ListBox.

Notes to Inheritors

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

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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