1、创建数据类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DataGridViewTest
{
    internal class UserData
    {
        public string Name { get; set; }
        public int Weight { get; set; }
        public int Height { get; set; }
    }
}

2、DataGridView数据操作

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace DataGridViewTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private List<UserData> dataList = new List<UserData>();
        private Random random = new Random();
        private bool dgv1 = false;

        /// <summary>
        /// 绑定数据
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btBind_Click(object sender, EventArgs e)
        {
            dataGridView1.DataSource = dataList;
            dataGridView1.Columns["Name"].HeaderText = "姓名";
            dataGridView1.Columns["Weight"].HeaderText = "体重";
            dataGridView1.Columns["Height"].HeaderText = "身高";
            Console.WriteLine("绑定数据");
        }
        /// <summary>
        /// 添加数据
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btAdd_Click(object sender, EventArgs e)
        {
            for(int i = 0; i < 10000; i++)
            {
                UserData userData = new UserData();
                userData.Name = "胡" + i.ToString();
                userData.Weight = random.Next(1, 100);
                userData.Height = random.Next(10, 250);
                dataList.Add(userData);
                //dataList.Insert(0, userData);
            }
            //倒序
            dataList.Reverse();
        }
        /// <summary>
        /// 刷新数据
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btRefresh_Click(object sender, EventArgs e)
        {
            if (dataList.Count == 0)
            {
                dataGridView1.DataSource = null;
                return;
            }
            if (dataGridView1.DataSource != null)
            {
                if (dataList.Count != dataGridView1.Rows.Count)
                {
                    dataGridView1.DataSource = null;
                    dataGridView1.DataSource = dataList;
                    dataGridView1.Columns["Name"].HeaderText = "姓名";
                    dataGridView1.Columns["Weight"].HeaderText = "体重";
                    dataGridView1.Columns["Height"].HeaderText = "身高";
                }
            }
            if (!dgv1)
            {
                dataGridView1.DataSource = dataList;
                dgv1 = true;
            }
            dataGridView1.Invalidate();
            //dataGridView1.Sort(dataGridView1.Columns[0], ListSortDirection.Descending);
            //dataGridView1.Rows[0].Selected = false;
            //dataGridView1.Rows[dataGridView1.Rows.Count-1].Selected = true;
        }
        /// <summary>
        /// 修改数据
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btUpdate_Click(object sender, EventArgs e)
        {
            if (dataList.Count > 0)
            {
                dataList[0].Name = "加" + dataList[0].Name;
                dataList[0].Weight = random.Next(1, 100);
                dataList[0].Height = random.Next(10, 250);
            }
        }
        /// <summary>
        /// 清除数据
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btClear_Click(object sender, EventArgs e)
        {
            dataList.Clear();
            dataGridView1.Rows.Clear();
        }
        //private int count = 0;
        /// <summary>
        /// 直接对DataGridView操作
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btRowTest_Click(object sender, EventArgs e)
        {
            if (this.dataGridView1 != null)
            {
                this.dataGridView1.Columns.Clear();
                this.dataGridView1.Rows.Clear();
            }
            //添加列名
            this.dataGridView1.Columns.Add("column0", "姓名");
            this.dataGridView1.Columns.Add("column1", "体重");
            this.dataGridView1.Columns.Add("column2", "身高");
            for (int i = 0; i < 10000; i++)
            {
                //if (this.dataGridView1 != null && this.dataGridView1.Rows.Count > 1000)
                //{
                //    this.dataGridView1.Rows.RemoveAt(this.dataGridView1.Rows.Count-2);
                //}

                //在头部添加
                DataGridViewRow row = new DataGridViewRow();
                DataGridViewTextBoxCell name = new DataGridViewTextBoxCell();
                name.Value = "胡" + (i).ToString();
                row.Cells.Add(name);
                DataGridViewTextBoxCell weight = new DataGridViewTextBoxCell();
                weight.Value = random.Next(1, 100);
                row.Cells.Add(weight);
                DataGridViewTextBoxCell height = new DataGridViewTextBoxCell();
                height.Value = random.Next(1, 100);
                row.Cells.Add(height);
                this.dataGridView1.Rows.Insert(0, row);

                //在底部添加
                //int index = this.dataGridView1.Rows.Add();
                //this.dataGridView1.Rows[index].Cells[0].Value = "胡" + i.ToString();
                //this.dataGridView1.Rows[index].Cells[1].Value = random.Next(1, 100);
                //this.dataGridView1.Rows[index].Cells[2].Value = random.Next(10, 250);
            }
            //count++;
        }
    }
}

3、运行