winform DataGridView根据光标位置设置所在行的背景颜色解决思路

private void gv_CellMouseEnter(object sender, DataGridViewCellEventArgs e)        {            if (e.RowIndex != -1)            {                object prevIndex = gv.Tag;                if (prevIndex == null || !prevIndex.Equals(e.RowIndex))                {                    gv.Tag = e.RowIndex;                    gv.Rows[e.RowIndex].DefaultCellStyle.BackColor = Color.Red;                    gv.Rows[e.RowIndex].DefaultCellStyle.ForeColor = Color.Blue;                }            }        }        private void gv_CellMouseLeave(object sender, DataGridViewCellEventArgs e)        {            if (e.RowIndex != -1)            {                gv.Rows[e.RowIndex].DefaultCellStyle.BackColor = Color.White;                gv.Rows[e.RowIndex].DefaultCellStyle.ForeColor = Color.FromArgb(0, 64, 64);            }        }