C#将Excel数据表导入SQL数据库

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;
using System.Data.OleDb;
using System.Data.SqlClient;

namespace ExcelToSQL
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }

        DataTable dt = new DataTable();
        string connString = "server = (local); uid = sa; pwd = sa; database = db_test";
        SqlConnection conn;

        private void button1_Click(object sender, EventArgs e)
        {
            System.Windows.Forms.OpenFileDialog fd = new OpenFileDialog();
            if (fd.ShowDialog() == DialogResult.OK)
            {
                string fileName = fd.FileName;
                bind(fileName);
            }
        }
        private void bind(string fileName)
        {
            string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" +
                 "Data Source=" + fileName + ";" +
                 "Extended Properties='Excel 8.0; HDR=Yes; IMEX=1'";
            OleDbDataAdapter da = new OleDbDataAdapter("SELECT *  FROM [student$]", strConn);
            DataSet ds = new DataSet();
            try
            {
                da.Fill(ds);
                dt = ds.Tables[0];
                this.dataGridView1.DataSource = dt;
            }
            catch (Exception err)
            {
                MessageBox.Show("操作失败！" + err.ToString());
            }
        }

        //将Datagridview1的记录插入到数据库  
        private void button2_Click(object sender, EventArgs e)
        {
            conn = new SqlConnection(connString);
            conn.Open();
            if (dataGridView1.Rows.Count > 0)
            {
                DataRow dr = null;
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    dr = dt.Rows[i];
                    insertToSql(dr);
                }
                conn.Close();
                MessageBox.Show("导入成功！");
            }
            else
            {
                MessageBox.Show("没有数据！");
            }
        }
        private void insertToSql(DataRow dr)
        {
            //excel表中的列名和数据库中的列名一定要对应
            string name = dr["StudentName"].ToString();
            string sex = dr["Sex"].ToString();
            string no = dr["StudentIDNO"].ToString();
            string major = dr["Major"].ToString();
            string sql = "insert into student values('" + name + "','" + sex + "','" + no + "','" + major +"')";         
            SqlCommand cmd = new SqlCommand(sql, conn);           
            cmd.ExecuteNonQuery();
        }
    }
}