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.NET Development
.NET Framework 3.5
UpdatePanel Class
 IsInPartialRendering Property

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Microsoft Visual Studio 2008/.NET Framework 3.5

Other versions are also available for the following:
.NET Framework Class Library
UpdatePanel..::.IsInPartialRendering Property

Gets a value that indicates whether the UpdatePanel control is being updated as a result of an asynchronous postback.

Namespace:  System.Web.UI
Assembly:  System.Web.Extensions (in System.Web.Extensions.dll)
Visual Basic (Declaration)
<BrowsableAttribute(False)> _
Public ReadOnly Property IsInPartialRendering As Boolean
Visual Basic (Usage)
Dim instance As UpdatePanel
Dim value As Boolean

value = instance.IsInPartialRendering
C#
[BrowsableAttribute(false)]
public bool IsInPartialRendering { get; }
Visual C++
[BrowsableAttribute(false)]
public:
property bool IsInPartialRendering {
    bool get ();
}
JScript
public function get IsInPartialRendering () : boolean

Property Value

Type: System..::.Boolean
true if the current UpdatePanel control is being updated as a result of an asynchronous postback; otherwise, false.

The IsInPartialRendering property is intended for use by control developers who want to know when an UpdatePanel control is being updated as a result of an asynchronous postback. In page development scenarios, use the IsInAsyncPostBack property to determine whether a page is processing as a result of an asynchronous postback.

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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Always returns false when called from Page_Load?      Maxim Golov   |   Edit   |   Show History
It seems that IsInPartialRendering always returns false when called from Page_Load, though "In page development scenarios..." statement seems to suggest that this property can be used to determine which UpdatePanel caused Page_Load event. Could you please clarify this?
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