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TreeView.OnPreRender Method

Raises the Control.PreRender event.

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

protected internal override void OnPreRender(
	EventArgs e
)

Parameters

e
Type: System.EventArgs
An System.EventArgs that contains event data.

The OnPreRender method is overridden to register for postback. If client script is enabled, it also renders the necessary script and hidden fields.

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

The OnPreRender method also allows 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 the OnPreRender method in a derived class, be sure to call the OnPreRender method for the base class so that registered delegates receive the event.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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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