通過重寫控件事件對DataGridView寫入行號

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;

namespace Costaco.CTN.Controls
{
    public class DataGridView : System.Windows.Forms.DataGridVIEw
    {

        public DataGridVIEw()
        {
        }
        //這裡鍵入override，然後空格就會出來重寫的列表，你選一個回車就可以了寫出不同的override

        protected override void OnRowPostPaint(DataGridVIEwRowPostPaintEventArgs e)
        {
            System.Drawing.Rectangle rectangle = new System.Drawing.Rectangle(e.RowBounds.Location.X, e.RowBounds.Location.Y, this.RowHeadersWidth - 4, e.RowBounds.Height);
            TextRenderer.DrawText(e.Graphics, Convert.ToInt32(e.RowIndex + 1).ToString(), this.RowHeadersDefaultCellStyle.Font, rectangle, this.RowHeadersDefaultCellStyle.ForeColor, TextFormatFlags.VerticalCenter | TextFormatFlags.Right);

            base.OnRowPostPaint(e);
        }

    }
}