C# dataGridview comboColumn从sql数据库加载数据

我有一个列名为ITEM的表1，我想在datagridview1的ComboColumn上加载ITEM

请让我知道如何加载数据并选择所需的项目名称。 下面是我与数据库的连接字符串

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这会让你走上正确的方向

下面的C程序从数据库中检索值并将其存储在数据集中，然后绑定到组合框

using System;
using System.Data;
using System.Data.SqlClient;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            string connetionString = null;
            SqlConnection connection;
            SqlCommand command;
            SqlDataAdapter adapter = new SqlDataAdapter();
            DataSet ds = new DataSet();
            int i = 0;
            string sql = null;
            connetionString = "Data Source=.;Initial Catalog=DatabaseName;User ID=UserName;Password=Password";
            sql = "select au_id,au_lname from authors";
            connection = new SqlConnection(connetionString);
            try
            {
                connection.Open();
                command = new SqlCommand(sql, connection);
                adapter.SelectCommand = command;
                adapter.Fill(ds);
                adapter.Dispose();
                command.Dispose();
                connection.Close();
                comboBox1.DataSource = ds.Tables[0];
                comboBox1.ValueMember = "au_id";
                comboBox1.DisplayMember = "au_lname";
            }
            catch (Exception ex)
            {
                MessageBox.Show("Can not open connection ! ");
            }
        }
        private void button1_Click(object sender, EventArgs e)
        {
            MessageBox.Show(comboBox1.Text + " " + comboBox1.SelectedValue);
        }
    }
}

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请向我们展示代码和表定义。如果您希望有人为您编写代码或指导您，那么您访问了错误的站点。