AsyncPostBackSourceElementID Property

Syntax

[BrowsableAttribute(false)]
public string AsyncPostBackSourceElementID { get; }

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

[BrowsableAttribute(false)]
public:
virtual String^ AsyncPostBackSourceElementID {
	String^ get () sealed;
}

/** @property */

Value

Return Value

A string literal that represents the unique ID of a control, if the control has an ID; otherwise, Empty.

Remarks

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

• A postback from a control that is inside an UpdatePanel control that has its ChildrenAsTriggers property set to true (the default).

• A postback from a control that is a trigger for an UpdatePanel control.

• A postback from a control that is registered by calling the RegisterAsyncPostBackControl(Control) method of the ScriptManager control.

Assembly: System.Web.Extensions (Module: System.Web.Extensions)