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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)

'Declaration
<BrowsableAttribute(False)> _
Public ReadOnly Property AsyncPostBackSourceElementID As String
'Usage
Dim instance As ScriptManager 
Dim value As String 

value = instance.AsyncPostBackSourceElementID

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:

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

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

.NET Framework

Supported in: 3.5

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