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ScriptManager::AsyncPostBackError Event

Occurs when there is a page error during an asynchronous postback.

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

public:
 event EventHandler<AsyncPostBackErrorEventArgs^>^ AsyncPostBackError {
	void add (EventHandler<AsyncPostBackErrorEventArgs^>^ value);
	void remove (EventHandler<AsyncPostBackErrorEventArgs^>^ value);
}
<asp:ScriptManager OnAsyncPostBackError="EventHandler" />

The AsyncPostBackError event is raised when there is a page error during asynchronous postbacks. How errors on the server are sent to the client depends on the AllowCustomErrorsRedirect property, the AsyncPostBackErrorMessage property, and the custom errors section of the Web.config file.

The following example shows how to handle the AsyncPostBackError event to set the AsyncPostBackErrorMessage property (which is sent to the client) to the server exception error message.

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

.NET Framework

Supported in: 4.5, 4, 3.5

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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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