C#编程-77：DataGridView绘制行序号

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 DataGridViewLineNum
{
    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_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)
        {   
            //绘制矩形区域
            Rectangle rect = new Rectangle(e.RowBounds.Location.X,e.RowBounds.Location.Y,dataGridView1.RowHeadersWidth-10,e.RowBounds.Height);
            //绘制行号
            TextRenderer.DrawText(e.Graphics,(e.RowIndex+1).ToString(),dataGridView1.RowHeadersDefaultCellStyle.Font,rect,dataGridView1.RowHeadersDefaultCellStyle.ForeColor,TextFormatFlags.VerticalCenter|TextFormatFlags.Right);
        }
    }
}