HtmlTextArea::OnServerChange Method (EventArgs^)
Raises the ServerChange event of the HtmlTextArea control. This allows you to provide a custom handler for the event.
Assembly: System.Web (in System.Web.dll)
Parameters
- e
-
Type:
System::EventArgs^
A System::EventArgs that contains the event data.
The ServerChange event is raised when the content of the HtmlTextArea control changes between posts to the server.
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This event is only raised when the user initiates a post to the server, such as by clicking a submit button. This event does not cause a post to the server to occur. |
Note |
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The control must have viewstate enabled for the ServerChange event to work correctly. |
This event is commonly used to perform data validation on the HtmlTextArea control when the user updates the text in the control.
Raising an event invokes the event handler through a delegate. For more information, see NIB: Raising an Event.
The OnServerChange 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 Inheritors:
When overriding OnServerChange in a derived class, be sure to call the base class's OnServerChange method so that registered delegates receive the event.
The following code example demonstrates how to specify and create a custom event handler for the ServerChange event. A message is displayed when the value entered in the HtmlTextArea control exceeds 20 characters.
Available since 1.1
