Occurs when a form becomes active.
Assembly: System.Web.Mobile (in System.Web.Mobile.dll)
The event occurs under the following circumstances:
When a page is first requested, the first form is activated.
When the ActiveForm property of the page is set programmatically.
When the user navigates to a form through a Link control whose target is a form.
This event's position in the event chain makes it very important for binding child controls to data sources or for setting a form property that can be inherited by all child controls.
The following code example shows how to set the OnActivate attribute in the Form element to point to a method that executes when the event occurs. The Form2_Activate method prepares the second form for display. This example is part of a larger example for the Form overview.
The following code example uses the single-file code model and may not work correctly if copied directly into a code-behind file. This code example must be copied into an empty text file that has an .aspx extension. For more information, see ASP.NET Web Page Syntax Overview.
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.