IPostBackDataHandler Interface
Defines methods that ASP.NET server controls must implement to automatically load postback data.
Assembly: System.Web (in System.Web.dll)
| Name | Description | |
|---|---|---|
 | LoadPostData(String^, NameValueCollection^) | When implemented by a class, processes postback data for an ASP.NET server control. |
| RaisePostDataChangedEvent() | When implemented by a class, signals the server control to notify the ASP.NET application that the state of the control has changed. |
You must implement the IPostBackDataHandler interface when creating a server control that needs to examine form data that is posted back to the server by the client. The contract that this interface defines allows a server control to determine whether its state should be altered as a result of the postback, and to raise the appropriate events. For more information, see Server Event Handling in ASP.NET Web Forms Pages.
The following code example demonstrates a custom text box server control that implements the IPostBackDataHandler interface. The Text property is changed as a result of the postback, and the server control raises a TextChanged event after postback data has been loaded.
Available since 1.1