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Control.OnPreRender Method

Raises the PreRender event.

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

'Declaration
Protected Friend Overridable Sub OnPreRender ( _
	e As EventArgs _
)

Parameters

e
Type: System.EventArgs

An EventArgs object that contains the event data.

ASP.NET calls this method to raise the PreRender event. If you are developing a custom control, you can override this method in order to provide additional processing. If you override this method, call the base control's OnPreRender method to notify subscribers to the event.

' Override the OnPreRender method to set _message to 
' a default value if it is null. 
Protected Overrides Sub OnPreRender(ByVal e As EventArgs)
    MyBase.OnPreRender(e)
    If _message Is Nothing Then
        _message = "Here is some default text." 
    End If 
End Sub

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1
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