.NET Framework Class Library
ControlOnUnload Method

Raises the Unload event.

Namespace:   System.Web.UI
Assembly:  System.Web (in System.Web.dll)
Syntax
Protected Friend Overridable Sub OnUnload ( _
	e As [%$TOPIC/h27s82as_en-us_VS_110_2_0_0_0_0%] _
)
protected internal virtual void OnUnload(
	[%$TOPIC/h27s82as_en-us_VS_110_2_0_1_0_0%] e
)
protected public:
virtual void OnUnload(
	[%$TOPIC/h27s82as_en-us_VS_110_2_0_2_0_0%]^ e
)
abstract OnUnload : 
        e:[%$TOPIC/h27s82as_en-us_VS_110_2_0_3_0_0%] -> unit  
override OnUnload : 
        e:[%$TOPIC/h27s82as_en-us_VS_110_2_0_3_0_1%] -> unit
function OnUnload(
	e : [%$TOPIC/h27s82as_en-us_VS_110_2_0_4_0_0%]
)

Parameters

e
Type: SystemEventArgs

An EventArgs object that contains event data.

Remarks

ASP.NET calls this method to raise the Unload 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 OnUnload method to notify subscribers to the event.

Examples
' Override the OnUnLoad method to set _text to 
' a default value if it is null. 
Protected Overrides Sub OnUnload(ByVal e As EventArgs)
    MyBase.OnUnload(e)
    If _text Is Nothing Then
        _text = "Here is some default text." 
    End If 
End Sub
// Override the OnUnLoad method to set _text to 
// a default value if it is null. 
protected override void OnUnload(EventArgs e)
{
    base.OnUnload(e);
    if (_text == null)
        _text = "Here is some default text.";
}
Version Information

.NET Framework

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