Gets a value indicating whether the current server control's child controls have any saved view-state settings.
Assembly: System.Web (in System.Web.dll)
Syntax . . :: . Boolean
true if any child controls have saved view state information; otherwise, false.
Protected ReadOnly Property HasChildViewState As Boolean
Getprotected bool HasChildViewState { get; }protected:
property bool HasChildViewState {
bool get ();
}member HasChildViewState : bool
Property Value
Type: Systemtrue if any child controls have saved view state information; otherwise, false.
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.
Examples
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
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();
}
Platforms
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, 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.