让DataGridView显示行号

DataGridView默认的属性中，不可设置显示行号。 效果如下： 为了表示行号，我们可以在DataGridView的RowPostPaint事件中进行绘制。 RowPostPaint事件，具体可以参照MSDN。 下面是实现代码： using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Drawing.Imaging;using System.Text;using System.Windows.Forms;namespace DrawRowIndex{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { dataGridView1.Dock = DockStyle.Fill; dataGridView1.DataSource = ImageCodecInfo.GetImageDecoders(); } private void dataGridView1_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e) { Rectangle rectangle = new Rectangle(e.RowBounds.Location.X, e.RowBounds.Location.Y, dataGridView1.RowHeadersWidth - 4, e.RowBounds.Height); TextRenderer.DrawText(e.Graphics, (e.RowIndex + 1).ToString(), dataGridView1.RowHeadersDefaultCellStyle.Font, rectangle, dataGridView1.RowHeadersDefaultCellStyle.ForeColor, TextFormatFlags.VerticalCenter | TextFormatFlags.Right); } }}