Assembly: System.Web (in System.Web.dll)
This method is called automatically at the end of the Init event in the server control's lifecycle.
Invoke this method when you develop templated data-bound controls. This method alerts ASP.NET to monitor changes to a server control's view state, which is required when you override the Control.DataBind method.
The following example overrides the DataBind method in a custom ASP.NET server control. It begins by calling the base OnDataBinding method and then uses the Clear method to delete all the child controls and the ClearChildViewState method to delete any saved view-state settings for those child controls. Finally, the ChildControlsCreated property is set to true. The control then uses the IsTrackingViewState property to determine whether view-state change tracking is enabled for the control. If it is not enabled, the method is called.
Public Overrides Sub DataBind() MyBase.OnDataBinding(EventArgs.Empty) ' Reset the control's state. Controls.Clear() ' Check for HasChildViewState to avoid unnecessary calls to ClearChildViewState. If HasChildViewState Then ClearChildViewState() End If ChildControlsCreated = True If Not IsTrackingViewState Then TrackViewState() End If End Sub
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.