ScriptManager.AsyncPostBackSourceElementID Property

 

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)

<BrowsableAttribute(False)>
Public ReadOnly Property AsyncPostBackSourceElementID As String

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
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