ScriptManager.AsyncPostBackSourceElementID Property


The .NET API Reference documentation has a new home. Visit the .NET API Browser on to see the new experience.

Gets the unique ID of the control that caused the asynchronous postback.

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

abstract AsyncPostBackSourceElementID : string with get
override AsyncPostBackSourceElementID : string with get

Property Value

Type: System.String

The unique ID of a control, if the control has an ID; otherwise, an empty string ("").

The AsyncPostBackSourceElementID property contains the value of the control ID that caused the asynchronous postback, which can be one of the following:

.NET Framework
Available since 3.5
Return to top