OnInit Method

ControlAdapter.OnInit Method (EventArgs)


Overrides the OnInit method for the associated control.

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

Protected Friend Overridable Sub OnInit (
	e As EventArgs


Type: System.EventArgs

An EventArgs that contains the event data.

If there is an adapter attached to a Control object and the OnInit method is overridden, the override method is called instead of the Control.OnInit method.

Override OnInit to perform target-specific processing in the Initialize stage of the control lifecycle. Typically, these are functions that are performed when a control is created.

Notes to Inheritors:

When you inherit from the ControlAdapter class and the adapter overrides the OnInit method, the adapter must call the corresponding base class method, which in turn calls the Control.OnInit method. If the Control.OnInit method is not called, the Control.Init event will not be raised.

The following code sample derives a custom control adapter from the ControlAdapter class. It then overrides the OnInit method to set a property on the associated control and call the base method to complete the control initialization.

Imports System
Imports System.Web.UI
Imports System.Web.UI.Adapters

Public Class CustomControlAdapter
    Inherits ControlAdapter

    ' Override the ControlAdapter default OnInit implementation.
    Protected Overrides Sub OnInit(ByVal e As EventArgs)

        ' Make the control invisible.
        Control.Visible = False

        ' Call the base method, which calls OnInit of the control, 
        ' which raises the control Init event.

    End Sub 'OnInit
End Class 'CustomControlAdapter

.NET Framework
Available since 2.0
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