GridControl

[ToolboxItem(true)]
    public partial class UserGridControl : GridControl
    {
        public new BaseView MainView
        {
            get
            {
                return base.MainView;
            }
            set
            {
                var gridView = value as GridView;
                
 
if (gridView == null) return;
                gridView.TopRowChanged += OnTopRowChanged;
                gridView.CustomDrawRowIndicator += gridView_CustomDrawRowIndicator;
                base.MainView = gridView;
            }
        }

        public override BaseView CreateView(string name)
        {
            
 
var baseView = base.CreateView(name);
            if (!(baseView is GridView)) return baseView;
            var gridView = baseView as GridView;
            InitView(gridView);
            return gridView;
        }

        public void InitView(GridView gridView)
        {
            gridView.Appearance.FocusedRow.BackColor 
 
= System.Drawing.Color.FromArgb(((int)(((byte)(128)))), ((int)(((byte)(255)))), ((int)(((byte)(255)))));
            gridView.Appearance.FocusedRow.Options.UseBackColor = true;
            gridView.Appearance.HideSelectionRow.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(128)))), ((int)(((byte)(255)))), ((int)(((byte)(255)))));
            gridView.Appearance.HideSelectionRow.Options.UseBackColor = true;
            gridView.Appearance.SelectedRow.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(128)))), ((int)(((byte)(255)))), ((int)(((byte)(255)))));
            gridView.Appearance.SelectedRow.Options.UseBackColor = true;

            gridView.OptionsBehavior.ReadOnly = true;
            gridView.OptionsBehavior.EditorShowMode = DevExpress.Utils.EditorShowMode.MouseDownFocused;
            gridView.OptionsDetail.EnableMasterViewMode = false;
            gridView.OptionsSelection.MultiSelectMode = GridMultiSelectMode.RowSelect;
            gridView.OptionsSelection.EnableAppearanceFocusedCell = false;
            //gridView.OptionsSelection.MultiSelect = true;
            gridView.OptionsView.ShowAutoFilterRow = true;
            gridView.OptionsView.ShowGroupPanel = false;
            gridView.FocusRectStyle = DevExpress.XtraGrid.Views.Grid.DrawFocusRectStyle.RowFocus;
            gridView.OptionsPrint.AutoWidth = false;
            gridView.IndicatorWidth = 30;
            gridView.TopRowChanged += OnTopRowChanged;
            gridView.CustomDrawRowIndicator += gridView_CustomDrawRowIndicator;
        }

        public void BestColunm(GridView gridView, bool bestColumn)
        {
            gridView.OptionsView.ColumnAutoWidth = !bestColumn;
            gridView.BestFitColumns();
        }

        private void gridView_CustomDrawRowIndicator(object sender, RowIndicatorCustomDrawEventArgs e)
        {
            var gridView = (GridView)sender;
            if (!e.Info.IsRowIndicator || e.RowHandle < 0) return;
            e.Info.DisplayText = (e.RowHandle + 1).ToString();
            e.Info.Appearance.TextOptions.HAlignment = DevExpress.Utils.HorzAlignment.Far;
        }

        private void OnTopRowChanged(object sender, EventArgs e)
        {
            GridView view = sender as GridView;
            if (view == null)
                return;
            int width = CalcIndicatorBestWidth(view);
            if ((view.IndicatorWidth - 4 < width || view.IndicatorWidth + 4 > width) && view.IndicatorWidth != width)
            {
                if (width < 30)
                    width = 30;
                view.IndicatorWidth = width;
            }
        }

        /// <summary>
        /// 計算行頭寬度
        /// </summary>
        /// <param name="sender"></param>
        /// <returns></returns>
        private int CalcIndicatorBestWidth(DevExpress.XtraGrid.Views.Grid.GridView view)
        {
            Graphics graphics = new Control().CreateGraphics();
            SizeF sizeF = new SizeF();
            int count = view.TopRowIndex + ((DevExpress.XtraGrid.Views.Grid.ViewInfo.GridViewInfo)view.GetViewInfo()).RowsInfo.Count;
            if (count == 0)
            {
                count = 30;
            }
            sizeF = graphics.MeasureString(count.ToString(), view.Appearance.Row.Font);
            return Convert.ToInt32(sizeF.Width) + 20;
        }
    }