Assembly: System.Web.Extensions (in System.Web.Extensions.dll)
[AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)] [AspNetHostingPermissionAttribute(SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)] public class UpdatePanelTriggerCollection : Collection<UpdatePanelTrigger>
Triggers in the UpdatePanelTrigger collection are specified by using the UpdatePanelTrigger Collection Editor in the designer or by adding them declaratively as <Triggers> elements inside the UpdatePanel control. You can add two types of triggers:
An AsyncPostBackTrigger object that can be used to specify that a control can cause an asynchronous postback and refresh the update panel's contents. The AsyncPostBackTrigger object is used for controls outside an update panel or controls that are not immediate child controls of an UpdatePanel control.