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ScriptManager::IsInAsyncPostBack Property

Gets a value that indicates whether the current postback is being executed in partial-rendering mode.

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

[BrowsableAttribute(false)]
public:
virtual property bool IsInAsyncPostBack {
	bool get () sealed;
}

Property Value

Type: System::Boolean
true if the current postback is executing in partial-rendering mode; otherwise, false.

Use the IsInAsyncPostBack property in combination with the IsPostBack property to distinguish between the initial page load, a partial-page update, and a full-page update in Load, InitComplete, or PreRender events.

.NET Framework

Supported in: 4, 3.5

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

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