TextBox::OnTextChanged Method
Raises the TextChanged event. This allows you to handle the event directly.
Assembly: System.Web (in System.Web.dll)
The TextChanged event is raised when the content of the text box changes between posts to the server.
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A TextBox control must persist some values between posts to the server for this event to work correctly. Be sure that view state is enabled for this control. |
Raising an event invokes the event handler through a delegate. For more information, see Raising an Event.
The OnTextChanged method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.
Notes to InheritorsWhen overriding OnTextChanged in a derived class, be sure to call the base class's OnTextChanged method so that registered delegates receive the event.
The following code example demonstrates how to override the OnTextChanged method so that it always marks a custom TextBox server control as having been modified.
Security Note |
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This example has a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview. |
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.
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