求高手帮我在DataGridViewButtonColumn中封一个enable属性

Question

在网上down了一个人家封装的 有点问题
 public class DataGridViewDisableButtonColumn : DataGridViewButtonColumn
    {
       public DataGridViewDisableButtonColumn()
       {
           this.CellTemplate = new DataGridViewDisableButtonCell();
       }
    }
 public class DataGridViewDisableButtonCell : DataGridViewButtonCell
    {
        private bool enabledValue;
        public bool Enabled
        {
            get
            {
                return enabledValue;
            }
            set
            {
                enabledValue = value;
            }
        }        public override object Clone()
        {
            DataGridViewDisableButtonCell cell =
                (DataGridViewDisableButtonCell)base.Clone();
            cell.Enabled = this.Enabled;
            return cell;
        }        public DataGridViewDisableButtonCell()
        {
            this.enabledValue = true;
        }        protected override void Paint(Graphics graphics,
            Rectangle clipBounds, Rectangle cellBounds, int rowIndex,
            DataGridViewElementStates elementState, object value,
            object formattedValue, string errorText,
            DataGridViewCellStyle cellStyle,
            DataGridViewAdvancedBorderStyle advancedBorderStyle,
            DataGridViewPaintParts paintParts)
        {
            if (!this.enabledValue)
            {
                if ((paintParts & DataGridViewPaintParts.Background) ==
                    DataGridViewPaintParts.Background)
                {
                    SolidBrush cellBackground =
                        new SolidBrush(cellStyle.BackColor);
                    graphics.FillRectangle(cellBackground, cellBounds);
                    cellBackground.Dispose();
                }                if ((paintParts & DataGridViewPaintParts.Border) ==
                    DataGridViewPaintParts.Border)
                {
                    PaintBorder(graphics, clipBounds, cellBounds, cellStyle,
                        advancedBorderStyle);
                }
                Rectangle buttonArea = cellBounds;
                Rectangle buttonAdjustment =
                    this.BorderWidths(advancedBorderStyle);
                buttonArea.X += buttonAdjustment.X;
                buttonArea.Y += buttonAdjustment.Y;
                buttonArea.Height -= buttonAdjustment.Height;
                buttonArea.Width -= buttonAdjustment.Width;
                ButtonRenderer.DrawButton(graphics, buttonArea,
                    System.Windows.Forms.VisualStyles.PushButtonState.Disabled);                if (this.FormattedValue is String)
                {
                    TextRenderer.DrawText(graphics,
                        (string)this.FormattedValue,
                        this.DataGridView.Font,
                        buttonArea, SystemColors.GrayText);
                }
            }
            else
            {
                base.Paint(graphics, clipBounds, cellBounds, rowIndex,
                    elementState, value, formattedValue, errorText,
                    cellStyle, advancedBorderStyle, paintParts);
            }
        }
    }这个封装调用的时候 很多时候反应很慢