/// <summary>
/// Causes the control to track changes to its view state so they can be stored in the object's ViewState property
/// 并将ViewState中所有IStateManager类型项标记为TrackViewState
/// </summary>
/// <remarks>
/// Causes the control to track changes to its view state so they can be stored in the object's ViewState property
/// 并将ViewState中所有IStateManager类型项标记为TrackViewState
/// </remarks>
protected override void TrackViewState()
{
base.TrackViewState();
WebControlUtility.TrackViewState(ViewState);
}