ICallbackEventHandler.RaiseCallbackEvent Method (System.Web.UI)

ICallbackEventHandler.RaiseCallbackEvent Method

.NET Framework 4

Other Versions

Processes a callback event that targets a control.

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

Syntax

C++

JScript

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'Declaration

Sub RaiseCallbackEvent ( _
	eventArgument As String _
)

Parameters

eventArgument: Type: System.String
A string that represents an event argument to pass to the event handler.

Remarks

When Nothing is used as the event argument parameter, the string is serialized to "null" and sent back to the server. Because there is no way to distinguish between Nothing and "null", you should avoid using Nothing argument parameters with callbacks.

Exceptions thrown in RaiseCallbackEvent will not prevent GetCallbackResult from being called and returning a result. To prevent GetCallbackResult from returning a result, set a flag when an exception is thrown in RaiseCallbackEvent and return an empty string from GetCallbackResult.

Platforms

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role not supported), 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.

Version Information

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

Reference

ICallbackEventHandler Interface

ICallbackEventHandler Members

System.Web.UI Namespace

GetCallbackEventReference

ICallbackEventHandler.RaiseCallbackEvent

GetCallbackResult

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