dataGridView添加下拉框列

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 DataGridViewMX
{
    public partial class FrmMain : Form
    {
        bool _启动 = true;
        public FrmMain()
        {
            InitializeComponent();
        }

        private void FrmMain_Load(object sender, EventArgs e)
        {
            int 列数 = 5;
            int 行数 = 10;
            int 选项数 = 10;

            // 1 建立数据
            DataTable dt1 = new DataTable();
            for (int i = 0; i < 列数; i++)
            {
                dt1.Columns.Add("第 " + i.ToString() + " 列");
            }

            for (int i = 0; i < 行数; i++)
            {
                dt1.Rows.Add();
                for (int j = 0; j < 列数; j++)
                {
                    dt1.Rows[i][j] = "测试" + (i + j).ToString();
                }
            }
            dataGridView1.DataSource = dt1;

            // 2 搜建ComboBox
            DataGridViewComboBoxColumn dcon = new DataGridViewComboBoxColumn();
            dcon.Name = "选项";
            dataGridView1.Columns.Insert(0, dcon);

            // 3 赋值ComboBox
            DataTable dt2 = new DataTable();
            dt2.Columns.Add("选项");
            for (int i = 0; i < 选项数; i++)
            {
                dt2.Rows.Add();
                dt2.Rows[i][0] = "测试" + i.ToString();
            }
            dcon.DataSource = dt2;
            dcon.DisplayMember = "选项";
            dcon.ValueMember = "选项";

            // 4 选择ComboBox
            try
            {
                for (int i = 0; i < 行数; i++)
                {
                    ((DataGridViewComboBoxCell)dataGridView1.Rows[i].Cells[0]).Value = dt1.Rows[i][0].ToString();
                }
            }
            catch { }
            _启动 = false;
        }

        private void dataGridView1_CellBeginEdit(object sender, DataGridViewCellCancelEventArgs e)
        {
            //MessageBox.Show("第 " + e.RowIndex.ToString() + " 行，第 " + e.ColumnIndex.ToString() + " 列");
        }

        private void dataGridView1_CellEndEdit(object sender, DataGridViewCellEventArgs e)
        {
            //MessageBox.Show("第 " + e.RowIndex.ToString() + " 行，第 " + e.ColumnIndex.ToString() + " 列");
        }

        private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
        {
            //if (!_启动) MessageBox.Show("第 " + e.RowIndex.ToString() + " 行，第 " + e.ColumnIndex.ToString() + " 列");
        }
    }
}

运行效果截图