如何在鼠标悬停任何单元格(c#)时突出显示datagridview的行和/或列标签？

Question

使用Windows窗体上的DataGridView控件,当您将鼠标移动到行标签(或列标签)上时,它(标签单元格)背景将变为蓝色阴影(或其他颜色,具体取决于您的Windows配色方案).

我想在将鼠标移动到网格中的任何单元格上时产生该效果 - 即突出显示鼠标当前悬停在其上的行的行标签.

使用mouseover事件更改当前行样式的逻辑非常简单.我可以更改该行的其他属性(比如说背景颜色),但我真的想要比这更微妙的东西,我认为突出显示行标签会非常有效.

可以这样做 - 如果是这样的话？(最好是C#)

Answer 1

您可以覆盖OnCellPainting事件以执行您想要的操作.根据DataGridView的大小,您可能会看到闪烁,但这应该是您想要的.

    class MyDataGridView : DataGridView
    {
        private int mMousedOverColumnIndex = int.MinValue;
        private int mMousedOverRowIndex = int.MinValue;

        protected override void OnCellMouseEnter(DataGridViewCellEventArgs e)
        {
            mMousedOverColumnIndex = e.ColumnIndex;
            mMousedOverRowIndex = e.RowIndex;
            base.OnCellMouseEnter(e);
            base.Refresh();
        }

        protected override void OnCellPainting(DataGridViewCellPaintingEventArgs e)
        {
            if (((e.ColumnIndex == mMousedOverColumnIndex) && (e.RowIndex == -1)) ||
                ((e.ColumnIndex == -1) && (e.RowIndex == mMousedOverRowIndex)))
            {
                PaintColumnHeader(e, System.Drawing.Color.Red);
            }
            base.OnCellPainting(e);
        }

        private void PaintColumnHeader(System.Windows.Forms.DataGridViewCellPaintingEventArgs e, System.Drawing.Color color)
        {
            LinearGradientBrush backBrush = new LinearGradientBrush(new System.Drawing.Point(0, 0), new System.Drawing.Point(100, 100), color, color);
            e.Graphics.FillRectangle(backBrush, e.CellBounds);
            DataGridViewPaintParts parts = (DataGridViewPaintParts.All & ~DataGridViewPaintParts.Background);
            e.AdvancedBorderStyle.Right = DataGridViewAdvancedCellBorderStyle.None;
            e.AdvancedBorderStyle.Left = DataGridViewAdvancedCellBorderStyle.None;
            e.Paint(e.ClipBounds, parts);
            e.Handled = true;
        }
    }