C#编程-76：DataGridView当前行显示不同颜色

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace DataGridViewColor
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            // TODO:  这行代码将数据加载到表“companyDataSet.clerk”中。您可以根据需要移动或删除它。
            this.clerkTableAdapter.Fill(this.companyDataSet.clerk);
        }
        private void dataGridView1_RowPrePaint(object sender, DataGridViewRowPrePaintEventArgs e)
        {
            //判断索引有效范围
            if(e.RowIndex>=dataGridView1.Rows.Count-1) return;
            //存储原来的颜色值
            Color oldForeColor = new Color();
            Color oldBackColor = new Color();
            //判断传入的行是否为当前选中行
            var row=dataGridView1.Rows[e.RowIndex];
            if (row == dataGridView1.CurrentRow)
            {
                //设置前景色
                if (row.DefaultCellStyle.ForeColor != Color.White)
                {
                    oldForeColor = row.DefaultCellStyle.ForeColor;
                    row.DefaultCellStyle.ForeColor = Color.White;
                }
                //设置背景色
                if (row.DefaultCellStyle.BackColor != Color.Blue)
                {
                    oldBackColor = row.DefaultCellStyle.BackColor;
                    row.DefaultCellStyle.BackColor = Color.Blue;
                }
            }
            //未选中则恢复原来的颜色
            else
            {
                row.DefaultCellStyle.ForeColor = oldForeColor;
                row.DefaultCellStyle.BackColor = oldBackColor;
            }
        }
    }
}