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SqlDependency.OnChange Event

Note: This event is new in the .NET Framework version 2.0.

Occurs when a notification is received for any of the commands associated with this SqlDependency object.

Namespace: System.Data.SqlClient
Assembly: System.Data (in

public event OnChangeEventHandler OnChange
/** @event */
public void add_OnChange (OnChangeEventHandler value)

/** @event */
public void remove_OnChange (OnChangeEventHandler value)

JScript supports the use of events, but not the declaration of new ones.

OnChange occurs when the results for the associated command change. If you are not using OnChange, you can check the HasChanges property to determine whether the query results have changed.

The OnChange event does not necessarily imply a change in the data. Other circumstances, such as time-out expired and failure to set the notification request, also generate OnChange.

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0