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
true if any child controls have saved view state information; otherwise, false.
Protected ReadOnly Property HasChildViewState As [%$TOPIC/d13ek6y8_en-us_VS_110_1_0_0_0_0%]protected [%$TOPIC/d13ek6y8_en-us_VS_110_1_0_1_0_0%] HasChildViewState { get; }protected:
property [%$TOPIC/d13ek6y8_en-us_VS_110_1_0_2_0_0%] HasChildViewState {
[%$TOPIC/d13ek6y8_en-us_VS_110_1_0_2_0_1%] get ();
}member HasChildViewState : [%$TOPIC/d13ek6y8_en-us_VS_110_1_0_3_0_0%] with getProperty Value
Type: SystemBooleantrue 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 Subpublic 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 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
