protected override void CreateChildControls()
{
base.CreateChildControls();
_hfVisible = new HiddenField();
Controls.Add( _hfVisible );
_hfVisible.ID = "hfVisible";
_lbFilter = new LinkButton();
Controls.Add( _lbFilter );
_lbFilter.ID = "lbFilter";
_lbFilter.CssClass = "filter btn btn-action btn-xs";
_lbFilter.ToolTip = "Apply Filter";
_lbFilter.Text = "Apply Filter";
_lbFilter.CausesValidation = false;
_lbFilter.Click += lbFilter_Click;
_lbClearFilter = new LinkButton();
Controls.Add( _lbClearFilter );
_lbClearFilter.ID = "_lbClearFilter";
_lbClearFilter.CssClass = "filter-clear btn btn-default btn-xs";
_lbClearFilter.ToolTip = "Clear Filter";
_lbClearFilter.Text = "Clear Filter";
_lbClearFilter.CausesValidation = false;
_lbClearFilter.Click += lbClearFilter_Click;
}