Control.HasChildViewState Property

Reference

Definition

Namespace:: System.Web.UI

Assembly:: System.Web.dll

Important

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

protected:
 property bool HasChildViewState { bool get(); };

protected bool HasChildViewState { get; }

member this.HasChildViewState : bool

Protected ReadOnly Property HasChildViewState As Boolean

Property Value

Boolean

true if any child controls have saved view state information; otherwise, false.

Examples

public override void DataBind() 
{
   base.OnDataBinding(EventArgs.Empty);
   // Reset the control's state.
   Controls.Clear();
   // Check for HasChildViewState to avoid unnecessary calls to ClearChildViewState.
   if (HasChildViewState)
      ClearChildViewState();
   ChildControlsCreated = true;
   if (!IsTrackingViewState)
      TrackViewState();
}

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

Remarks

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.

Applies to

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