DevExpress GridView 单元格进度条的绑定及拓展自定义进度条不同颜色显示

DevExpress提供进度条的控件ProgressBarControl，并且能在GridView的单元格中使用，效果图如图所示

关于单元格绑定progressBarControl，这里我简单介绍一下，列的ColumnEdit属性选择ProgressBarControl，然后设置选择的repositoryitemprogressBar1的ShowTitle属性来显示中间的百分数文本即可（其中，这里的数据源要求为整数型，如果你的字段值为小数类型的话，比如0.5，绑定字段的时候乘以100，改成50，这里的%是控件本身会显示的，不需要设置displayformat）。

ProgressBarControl使用起来简单快捷，但是如果想控制当小于某个值的时候用颜色预警，ProgressbarControl暂时还没有提供这个功能，所以只能自己利用GridView的CustomDrawCell的单元格绘制事件来实现此需求。

代码直接copy调用即可使用：

/// 

        /// 自定义进度条列
        /// 
        /// 
        /// 列的字段名
        /// 
        /// 
        /// 
        public static void CustomProgressBarColumn(DevExpress.XtraGrid.Views.Grid.GridView view, string fieldName, int warningValue=50, Brush lessColor = null, Brush greaterColor = null)
        {
            var col = view.Columns[fieldName];
            if (col == null) return;
            col.AppearanceCell.Options.UseTextOptions = true;
            col.AppearanceCell.TextOptions.HAlignment = HorzAlignment.Center;
            view.CustomDrawCell += (s, e) =>
            {
                if (e.Column.FieldName == fieldName)
                {
                    DrawProgressBar(e,warningValue,lessColor,greaterColor);
                    e.Handled = true;
                    DrawEditor(e);
                }
            };
        }
       static void DrawProgressBar(DevExpress.XtraGrid.Views.Base.RowCellCustomDrawEventArgs e, int warningValue = 50, Brush lessColor = null, Brush greaterColor = null)
        {
            decimal percent = e.CellValue == null ? 0m : (decimal)e.CellValue;
            int width = (int)(percent * e.Bounds.Width);
            Rectangle rect = new Rectangle(e.Bounds.X, e.Bounds.Y, width, e.Bounds.Height);

            Brush b = Brushes.Green;
            if (greaterColor != null)
            {
                b = greaterColor;
            }
            if (percent * 100 < warningValue)
            {
                if (lessColor == null)
                {
                    b = Brushes.Red;
                }
                else
                {
                    b = lessColor;
                }
            }
            e.Graphics.FillRectangle(b, rect);
        }
       static void DrawEditor(DevExpress.XtraGrid.Views.Base.RowCellCustomDrawEventArgs e)
        {
            GridCellInfo cell = e.Cell as GridCellInfo;
            Point offset = cell.CellValueRect.Location;
            BaseEditPainter pb = cell.ViewInfo.Painter as BaseEditPainter;
            AppearanceObject style = cell.ViewInfo.PaintAppearance;
            if (!offset.IsEmpty)
                cell.ViewInfo.Offset(offset.X, offset.Y);
            try
            {
                pb.Draw(new ControlGraphicsInfoArgs(cell.ViewInfo, e.Cache, cell.Bounds));
            }
            finally
            {
                if (!offset.IsEmpty)
                {
                    cell.ViewInfo.Offset(-offset.X, -offset.Y);
                }
            }
        }

调用代码示例如下（绑定的数据源字段值为小于1的小数值，如：0.33，设置列的DisplayFormat属性）：

gridView1.Columns["col11"].DisplayFormat.FormatType = FormatType.Numeric;
gridView1.Columns["col11"].DisplayFormat.FormatString = "p0";
CustomProgressBarColumn(gridView1, "col11", 50, Brushes.IndianRed, Brushes.DodgerBlue);