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Control.HasChildViewState Property

Gets a value indicating whether the current server control's child controls have any saved view-state settings.

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

'Declaration
Protected ReadOnly Property HasChildViewState As Boolean
'Usage
Dim value As Boolean 

value = Me.HasChildViewState

Property Value

Type: System.Boolean
true if any child controls have saved view state information; otherwise, false.

You can avoid unnecessary calls to the ClearChildViewState method by using this property to verify that any child controls of the server control are storing view-state information.

Public Overrides Sub DataBind()
   MyBase.OnDataBinding(EventArgs.Empty)
   ' Reset the control's state.
   Controls.Clear()
   ' Check for HasChildViewState to avoid unnecessary calls to ClearChildViewState. 
   If HasChildViewState Then
      ClearChildViewState()
   End If
   ChildControlsCreated = True 
   If Not IsTrackingViewState Then
      TrackViewState()
   End If 
End Sub

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

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, 3.0, 2.0, 1.1, 1.0
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