Control.OnUnload Method
Updated: April 2009
Raises the Unload event.
Assembly: System.Web (in System.Web.dll)
ASP.NET calls this method in order 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, you typically call the base control's OnUnload method. If the base control's OnUnload method is not called, subscribers to the event will not be notified.
' Create a StreamWriter to write data to a text file. Dim myFile As TextWriter = File.CreateText("c:\NewTextFile.txt") Sub Page_Load(sender As Object, e As EventArgs) ' Write status to file. myFile.WriteLine("Page has loaded.") End Sub Sub CustomControl_OnLoad(sender As Object, e As EventArgs) myFile.WriteLine("Custom control has loaded.") End Sub Sub CustomControl_OnUnload(sender As Object, e As EventArgs) ' Server controls final cleanup such as; ' closing files etc.goes here myFile.WriteLine("Custom control was unloaded.") ' Close the stream object. myFile.Close() End Sub
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.