Control.OnPreRender(EventArgs) Method
Definition
Raises the PreRender event.
protected:
virtual void OnPreRender(EventArgs ^ e);
protected public:
virtual void OnPreRender(EventArgs ^ e);
protected virtual void OnPreRender (EventArgs e);
protected internal virtual void OnPreRender (EventArgs e);
abstract member OnPreRender : EventArgs -> unit
override this.OnPreRender : EventArgs -> unit
Protected Overridable Sub OnPreRender (e As EventArgs)
Protected Friend Overridable Sub OnPreRender (e As EventArgs)
Parameters
Examples
// Override the OnPreRender method to set _message to
// a default value if it is null.
protected override void OnPreRender(EventArgs e)
{
base.OnPreRender(e);
if (_message == null)
_message = "Here is some default text.";
}
' 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
Remarks
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.