IPostBackDataHandler Interface


Defines methods that ASP.NET server controls must implement to automatically load postback data.

Namespace:   System.Web.UI
Assembly:  System.Web (in System.Web.dll)

type IPostBackDataHandler = interface end

System_CAPS_pubmethodLoadPostData(String, NameValueCollection)

When implemented by a class, processes postback data for an ASP.NET server control.


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.

No code example is currently available or this language may not be supported.

.NET Framework
Available since 1.1
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