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:
    单击显示全图,Ctrl+滚轮缩放图片


    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:
    复制  保存
    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);
        }
        }
        }
posted @ 2009-01-04 13:35  寒山潜龙  阅读(631)  评论(0编辑  收藏  举报