ScriptManager.AsyncPostBackSourceElementID Property
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Gets the unique ID of the control that caused the asynchronous postback.
public:
property System::String ^ AsyncPostBackSourceElementID { System::String ^ get(); };[System.ComponentModel.Browsable(false)]
public string AsyncPostBackSourceElementID { get; }[<System.ComponentModel.Browsable(false)>]
member this.AsyncPostBackSourceElementID : stringPublic ReadOnly Property AsyncPostBackSourceElementID As StringThe unique ID of a control, if the control has an ID; otherwise, an empty string ("").
- Attributes
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 whose ChildrenAsTriggers property is 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 method of the ScriptManager control.
| Product | Versions |
|---|---|
| .NET Framework | 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
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