return null;
return _stateState;
}
void IStateManager.TrackViewState()
{
_marked = true;
if( _state != null )
((IStateManager)_state).TrackViewState();
void IStateManager.LoadViewState( object state )
if( state != null )
object _newState = (object)state;
((IStateManager)ViewState).LoadViewState( _newState );
bool IStateManager.IsTrackingViewState
get
return _marked;
internal new StateBag ViewState //注意,这里覆盖基类的ViewState属性
if( _state == null )
_state = new StateBag( true );
if( ((IStateManager)this).IsTrackingViewState )
return _state;
下面把控件的表现输出到页面,其实System.Web.UI.WebControls.TextBox也是重新包装了Input而已。
protected override void Render(HtmlTextWriter output)
string strOutput = "<Input name=\""+this.ClientID+"\" type=\"text\" value=\""+this.Text+"\">";
output.Write(strOutput);
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